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- Dual 32‑bit Counter/Frequency Inputs:
Two independent channels capable of counting up to 4,294,967,295 pulses each, supporting both counter and frequency measurement modes.
- High‑Speed Input Capability:
Maximum input frequency of 20 kHz (typical) with minimum pulse width of > 5 µs, ensuring accurate detection of fast pulse trains.
- Frequency Measurement Range:
Programmable from 1 Hz to 20 kHz, with built‑in gate times of 0.1 s or 1 s for flexible resolution and response trade‑offs.
- Programmable Digital Filter:
Adjustable high‑ and low‑level minimum signal width (4 µs – 1.02 ms) for noise suppression and signal conditioning.
- Selectable Input Modes:
Supports photo‑isolated or TTL (non‑isolated) input operation.
- Isolated mode: 5000 Vrms isolation, logic 0 ≤ 1 V, logic 1 = 3.5 – 30 V.
- Non‑isolated mode: programmable thresholds (default = 0.8 V low, 2.4 V high).
- External Gate Control:
Each counter channel includes an external gate input for enabling/disabling counting or synchronizing with external events.
- Alarm and Comparator Functions:
Independent programmable alarm limits for each counter. When enabled, alarms can drive the digital outputs to activate external indicators or relays.
- Dual Digital Outputs:
Two open‑collector outputs (30 V max, 30 mA sink) configurable as alarm outputs or general‑purpose digital outputs.
- High Isolation and Noise Immunity:
5000 Vrms isolation between field inputs and communication circuitry, with internal watchdog and EMI‑shielded ABS enclosure.
- RS‑485 Communication Interface:
Two‑wire, half‑duplex, multi‑drop network supporting up to 256 addressable modules at baud rates from 1200 bps to 115.2 kbps.
- Programmable Watchdog Timers:
- Module internal watchdog: 150 ms automatic reset on internal fault.
- Host watchdog: 100 ms – 25.5 s programmable timeout with safe‑state output.
- Software‑Configurable Parameters:
Input mode, gate mode, filter enable, threshold levels, alarm limits, and output states are all programmable via ASCII command set.
- Industrial‑Grade Design:
Compact, DIN‑rail or panel‑mountable ABS housing with screw‑terminal connectors for secure field wiring.
Two independent channels capable of counting up to 4,294,967,295 pulses each, supporting both counter and frequency measurement modes.
- High‑Speed Input Capability:
Maximum input frequency of 20 kHz (typical) with minimum pulse width of > 5 µs, ensuring accurate detection of fast pulse trains.
- Frequency Measurement Range:
Programmable from 1 Hz to 20 kHz, with built‑in gate times of 0.1 s or 1 s for flexible resolution and response trade‑offs.
- Programmable Digital Filter:
Adjustable high‑ and low‑level minimum signal width (4 µs – 1.02 ms) for noise suppression and signal conditioning.
- Selectable Input Modes:
Supports photo‑isolated or TTL (non‑isolated) input operation.
- Isolated mode: 5000 Vrms isolation, logic 0 ≤ 1 V, logic 1 = 3.5 – 30 V.
- Non‑isolated mode: programmable thresholds (default = 0.8 V low, 2.4 V high).
- External Gate Control:
Each counter channel includes an external gate input for enabling/disabling counting or synchronizing with external events.
- Alarm and Comparator Functions:
Independent programmable alarm limits for each counter. When enabled, alarms can drive the digital outputs to activate external indicators or relays.
- Dual Digital Outputs:
Two open‑collector outputs (30 V max, 30 mA sink) configurable as alarm outputs or general‑purpose digital outputs.
- High Isolation and Noise Immunity:
5000 Vrms isolation between field inputs and communication circuitry, with internal watchdog and EMI‑shielded ABS enclosure.
- RS‑485 Communication Interface:
Two‑wire, half‑duplex, multi‑drop network supporting up to 256 addressable modules at baud rates from 1200 bps to 115.2 kbps.
- Programmable Watchdog Timers:
- Module internal watchdog: 150 ms automatic reset on internal fault.
- Host watchdog: 100 ms – 25.5 s programmable timeout with safe‑state output.
- Software‑Configurable Parameters:
Input mode, gate mode, filter enable, threshold levels, alarm limits, and output states are all programmable via ASCII command set.
- Industrial‑Grade Design:
Compact, DIN‑rail or panel‑mountable ABS housing with screw‑terminal connectors for secure field wiring.
Comprehensive Product Summary – NuDAM ND‑6080 Counter / Frequency Input Module
### 1. Product Overview
Product Name: NuDAM 2‑Channel Counter / Frequency Input Module
Model: ND‑6080
Series: NuDAM‑6000 Series Distributed Data Acquisition Modules
Article Number: ND‑6080
Manufacturer: ADLINK Technology Inc. (Taipei, Taiwan)
The ND‑6080 is a member of ADLINK’s NuDAM‑6000 family of modular, network‑addressable data acquisition and control devices. It is designed for industrial and laboratory automation systems requiring precise event counting, frequency measurement, and digital control over RS‑485 networks. The module integrates two independent 32‑bit counter/frequency input channels, programmable digital filtering, alarm comparators, and two open‑collector digital outputs. It supports both isolated and non‑isolated input modes and provides high‑voltage isolation for robust operation in electrically noisy environments.
### 2. Key Features
- Dual 32‑bit Counter/Frequency Inputs:
Two independent channels capable of counting up to 4,294,967,295 pulses each, supporting both counter and frequency measurement modes.
- High‑Speed Input Capability:
Maximum input frequency of 20 kHz (typical) with minimum pulse width of > 5 µs, ensuring accurate detection of fast pulse trains.
- Frequency Measurement Range:
Programmable from 1 Hz to 20 kHz, with built‑in gate times of 0.1 s or 1 s for flexible resolution and response trade‑offs.
- Programmable Digital Filter:
Adjustable high‑ and low‑level minimum signal width (4 µs – 1.02 ms) for noise suppression and signal conditioning.
- Selectable Input Modes:
Supports photo‑isolated or TTL (non‑isolated) input operation.
- Isolated mode: 5000 Vrms isolation, logic 0 ≤ 1 V, logic 1 = 3.5 – 30 V.
- Non‑isolated mode: programmable thresholds (default = 0.8 V low, 2.4 V high).
- External Gate Control:
Each counter channel includes an external gate input for enabling/disabling counting or synchronizing with external events.
- Alarm and Comparator Functions:
Independent programmable alarm limits for each counter. When enabled, alarms can drive the digital outputs to activate external indicators or relays.
- Dual Digital Outputs:
Two open‑collector outputs (30 V max, 30 mA sink) configurable as alarm outputs or general‑purpose digital outputs.
- High Isolation and Noise Immunity:
5000 Vrms isolation between field inputs and communication circuitry, with internal watchdog and EMI‑shielded ABS enclosure.
- RS‑485 Communication Interface:
Two‑wire, half‑duplex, multi‑drop network supporting up to 256 addressable modules at baud rates from 1200 bps to 115.2 kbps.
- Programmable Watchdog Timers:
- Module internal watchdog: 150 ms automatic reset on internal fault.
- Host watchdog: 100 ms – 25.5 s programmable timeout with safe‑state output.
- Software‑Configurable Parameters:
Input mode, gate mode, filter enable, threshold levels, alarm limits, and output states are all programmable via ASCII command set.
- Industrial‑Grade Design:
Compact, DIN‑rail or panel‑mountable ABS housing with screw‑terminal connectors for secure field wiring.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|------------------|
| Interface | RS‑485, 2‑wire, half‑duplex |
| Communication Speed | 1200 – 115,200 bps |
| Address Range | 00 – FF (hex), up to 256 modules per network |
| Counter Inputs | 2 × independent 32‑bit counters |
| Maximum Count Value | 4,294,967,295 (0xFFFFFFFF) |
| Input Frequency Range | 1 Hz – 20 kHz |
| Maximum Input Frequency | 20 kHz |
| Minimum Pulse Width | > 5 µs |
| Input Modes | Isolated / Non‑isolated (TTL) |
| Isolated Input Levels | Logic 0 ≤ 1 V; Logic 1 = 3.5 – 30 V |
| Isolation Voltage | 5000 Vrms |
| Non‑Isolated Input Levels | Programmable; default Low = 0.8 V, High = 2.4 V |
| Programmable Digital Filter | 4 µs – 1.02 ms (high/low width) |
| Frequency Measurement Gate | 0.1 s / 1.0 s selectable |
| Digital Outputs | 2 × open‑collector, 30 V max, 30 mA sink |
| Alarm Comparator | Independent per counter channel |
| Power Supply | +10 V – +30 V DC (unregulated) |
| Power Consumption | 2.0 W (typical) |
| Isolation Protection | 5000 Vrms between I/O and logic |
| Watchdog Timers | Internal 150 ms; Host 100 ms – 25.5 s |
| Operating Temperature | −10 °C – +70 °C |
| Storage Temperature | −25 °C – +80 °C |
| Case Material | ABS plastic with EMI shielding |
| Mounting | DIN‑rail or panel mount |
| Dimensions / Weight | Compact NuDAM form factor (~72 × 122 × 35 mm, approx. 200 g) |
### 4. Functionality
Operating Principle:
Each ND‑6080 channel can operate as a pulse counter or frequency meter. In counter mode, the module increments a 32‑bit register on each valid input transition, optionally gated by an external signal. In frequency mode, the module counts pulses within a fixed gate period (0.1 s or 1 s) to compute frequency in Hz. The microcontroller processes the input, applies digital filtering, and communicates results to the host via ASCII commands over RS‑485.
Use Cases and Applications:
- Industrial process monitoring (flow meters, turbine sensors, encoders)
- Machine cycle counting and production line event logging
- Rotational speed or RPM measurement
- Pulse‑based energy or utility metering
- Laboratory instrumentation requiring frequency analysis
- Integration with PLCs, SCADA, or PC‑based control systems
Compatibility:
Fully compatible with other NuDAM‑6000 modules (analog I/O, digital I/O, communication converters). Controlled via ADLINK’s NuDAM Administration Utility or any host supporting ASCII serial communication.
### 5. Components & Accessories
Included Components:
- ND‑6080 module with integrated screw‑terminal block
- User documentation (NuDAM‑6000 User’s Guide)
- Mounting hardware for DIN‑rail or panel installation
Connectors and Pin Assignments:
| Pin | Signal | Description |
|----------|-------------|----------------|
| 1 | IN0 | Non‑isolated input, Counter 0 |
| 2 | GATE0 | External gate control, Counter 0 |
| 3 | GND | Ground for non‑isolated input |
| 4 | IN1 | Non‑isolated input, Counter 1 |
| 5 | GATE1 | External gate control, Counter 1 |
| 6 | DEFAULT* | Initialization pin (connect to GND for default state) |
| 7 | (Y) DATA+ | RS‑485 data line (+) |
| 8 | (G) DATA‑ | RS‑485 data line (–) |
| 9 | (R) +Vs | Power input +10 – +30 V DC |
| 10 | (B) GND | Power ground |
| 11–18 | Differential IN± and GATE± pairs for isolated mode |
| 19 | DO0 | Digital Output 0 / Counter 0 Alarm |
| 20 | DO1 | Digital Output 1 / Counter 1 Alarm |
Optional Accessories:
- RS‑232 ↔ RS‑485 converter (ND‑6520)
- USB ↔ RS‑485 converter (ND‑6530)
- RS‑485 repeater (ND‑6510)
- Termination resistors (120 Ω ± 2 %)
- Shielded twisted‑pair communication cable
### 6. Installation & Setup
Requirements:
- Host computer or controller with RS‑232/USB port and NuDAM converter
- 10 – 30 V DC regulated power supply
- Shielded twisted‑pair cable for RS‑485 bus
- Proper network termination (120 Ω at both ends)
Mounting Options:
- DIN‑rail clip or panel screw mounting
- Ensure adequate ventilation and isolation from high‑voltage sources
Configuration Procedure:
1. Initialization:
Connect the DEFAULT* pin to GND and power ON to enter default state (Address 00, 9600 bps, checksum disabled).
2. Assign Address and Baud Rate:
Use the “Set Configuration” command `%(OldAddr)(NewAddr)(TypeCode)(BaudRate)(ChecksumFlag)` to assign unique ID and communication parameters.
3. Network Integration:
Connect DATA+ and DATA– lines in parallel with other NuDAM modules; observe polarity.
4. Termination:
Install 120 Ω resistors at both ends of the RS‑485 bus.
5. Software Setup:
Use NuDAM Administration Utility to verify communication, read configuration, and test inputs/outputs.
Wiring Notes:
- For isolated mode, use differential pairs (IN±, GATE±).
- For TTL mode, use single‑ended IN0/IN1 and GND.
- DO0/DO1 open‑collector outputs require external pull‑up or load to +Vs (max 30 V).
### 7. Performance & Capabilities
Counting Performance:
- 32‑bit resolution ensures long‑duration counting without overflow.
- Overflow flag and maximum count value programmable via commands.
- External gate allows synchronized counting or time‑window control.
Frequency Measurement:
- Gate‑time selectable (0.1 s / 1 s) balances speed and accuracy.
- Frequency range 1 Hz – 20 kHz with 1 Hz resolution at 1 s gate.
Digital Filtering:
- Programmable high/low pulse‑width thresholds (4 µs – 1.02 ms).
- Eliminates spurious transitions and contact bounce.
Alarm Functionality:
- Independent alarm limit per counter.
- When enabled, DO0/DO1 assert on threshold crossing.
- Alarms can be read, enabled/disabled, or cleared via commands.
Output Control:
- DO0/DO1 can be manually set/reset for general digital control.
- Open‑collector design supports external relays, LEDs, or logic inputs.
Limitations:
- Maximum input frequency 20 kHz; minimum pulse width > 5 µs.
- Non‑isolated TTL inputs limited to 0–5 V range.
- DO outputs limited to 30 V / 30 mA sink.
### 8. Standards & Compliance
- Electrical Isolation: 5000 Vrms tested isolation between field and logic circuits.
- Communication Standard: EIA RS‑485 compliant, 2‑wire half‑duplex multi‑drop.
- EMI/ESD Protection: Transient voltage suppressors (TVS) and PTC resettable fuses.
- Environmental Protection: Conformal‑coated PCB for humidity and chemical resistance.
- CE Class A Conformity: Meets EMC requirements for industrial environments.
- Safety: Designed for 24 V DC industrial control systems.
- RoHS Compliance: Lead‑free manufacturing (per ADLINK policy).
### 9. Additional Information
Warranty:
One‑year limited warranty against defects in materials and workmanship from date of purchase. Warranty excludes damage from misuse, modification, or operation beyond specifications.
Technical Support:
ADLINK provides comprehensive documentation, NuDAM Administration Utility software, and firmware updates. Support is available via ADLINK’s global service network.
Maintenance:
- Periodically inspect wiring and terminal tightness.
- Keep module free from dust and moisture.
- Avoid exposure to strong magnetic fields or high‑voltage transients.
- Firmware updates and configuration backups recommended during system maintenance.
Firmware & Command Interface:
The ND‑6080 uses a simple ASCII command/response protocol over RS‑485. Key command categories include:
- Configuration: Set/read address, baud rate, checksum.
- Counter Control: Start/stop, clear, read value (HEX/DEC), set initial/max count.
- Frequency Mode: Select gate time, read frequency.
- Filter & Threshold: Enable/disable filter, set min pulse width, set TTL trigger levels.
- Alarm Management: Enable/disable alarms, set/read alarm limits, read alarm status.
- Digital Output: Set/read DO values.
- Watchdog & Safety: Configure host watchdog timeout and safe output states.
Example Commands:
- Read counter 0 value (HEX): `#30 0<CR>` → `>0000FFFF<CR>`
- Set TTL input high trigger to 3 V: `$30 1H30<CR>`
- Enable alarm on counter 1: `@30 EA1<CR>`
- Clear counter 0: `$30 60<CR>`
Software Tools:
NuDAM Administration Utility (Windows) provides graphical configuration, monitoring, and calibration functions. It supports automatic module discovery, parameter editing, and command testing.
Maintenance Calibration:
No periodic calibration required for digital counting; verify input thresholds and filter settings during system commissioning.
### Summary
The ADLINK NuDAM ND‑6080 is a robust, high‑precision counter and frequency input module engineered for distributed data acquisition networks. With dual 32‑bit counters, programmable filtering, alarm outputs, and full RS‑485 connectivity, it provides a flexible solution for pulse‑based measurement and control tasks in industrial automation, process monitoring, and laboratory instrumentation. Its combination of high isolation, configurable logic thresholds, and comprehensive command set ensures reliable operation in demanding environments while maintaining seamless integration with other NuDAM‑6000 modules and host systems.
### 1. Product Overview
Product Name: NuDAM 2‑Channel Counter / Frequency Input Module
Model: ND‑6080
Series: NuDAM‑6000 Series Distributed Data Acquisition Modules
Article Number: ND‑6080
Manufacturer: ADLINK Technology Inc. (Taipei, Taiwan)
The ND‑6080 is a member of ADLINK’s NuDAM‑6000 family of modular, network‑addressable data acquisition and control devices. It is designed for industrial and laboratory automation systems requiring precise event counting, frequency measurement, and digital control over RS‑485 networks. The module integrates two independent 32‑bit counter/frequency input channels, programmable digital filtering, alarm comparators, and two open‑collector digital outputs. It supports both isolated and non‑isolated input modes and provides high‑voltage isolation for robust operation in electrically noisy environments.
### 2. Key Features
- Dual 32‑bit Counter/Frequency Inputs:
Two independent channels capable of counting up to 4,294,967,295 pulses each, supporting both counter and frequency measurement modes.
- High‑Speed Input Capability:
Maximum input frequency of 20 kHz (typical) with minimum pulse width of > 5 µs, ensuring accurate detection of fast pulse trains.
- Frequency Measurement Range:
Programmable from 1 Hz to 20 kHz, with built‑in gate times of 0.1 s or 1 s for flexible resolution and response trade‑offs.
- Programmable Digital Filter:
Adjustable high‑ and low‑level minimum signal width (4 µs – 1.02 ms) for noise suppression and signal conditioning.
- Selectable Input Modes:
Supports photo‑isolated or TTL (non‑isolated) input operation.
- Isolated mode: 5000 Vrms isolation, logic 0 ≤ 1 V, logic 1 = 3.5 – 30 V.
- Non‑isolated mode: programmable thresholds (default = 0.8 V low, 2.4 V high).
- External Gate Control:
Each counter channel includes an external gate input for enabling/disabling counting or synchronizing with external events.
- Alarm and Comparator Functions:
Independent programmable alarm limits for each counter. When enabled, alarms can drive the digital outputs to activate external indicators or relays.
- Dual Digital Outputs:
Two open‑collector outputs (30 V max, 30 mA sink) configurable as alarm outputs or general‑purpose digital outputs.
- High Isolation and Noise Immunity:
5000 Vrms isolation between field inputs and communication circuitry, with internal watchdog and EMI‑shielded ABS enclosure.
- RS‑485 Communication Interface:
Two‑wire, half‑duplex, multi‑drop network supporting up to 256 addressable modules at baud rates from 1200 bps to 115.2 kbps.
- Programmable Watchdog Timers:
- Module internal watchdog: 150 ms automatic reset on internal fault.
- Host watchdog: 100 ms – 25.5 s programmable timeout with safe‑state output.
- Software‑Configurable Parameters:
Input mode, gate mode, filter enable, threshold levels, alarm limits, and output states are all programmable via ASCII command set.
- Industrial‑Grade Design:
Compact, DIN‑rail or panel‑mountable ABS housing with screw‑terminal connectors for secure field wiring.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|------------------|
| Interface | RS‑485, 2‑wire, half‑duplex |
| Communication Speed | 1200 – 115,200 bps |
| Address Range | 00 – FF (hex), up to 256 modules per network |
| Counter Inputs | 2 × independent 32‑bit counters |
| Maximum Count Value | 4,294,967,295 (0xFFFFFFFF) |
| Input Frequency Range | 1 Hz – 20 kHz |
| Maximum Input Frequency | 20 kHz |
| Minimum Pulse Width | > 5 µs |
| Input Modes | Isolated / Non‑isolated (TTL) |
| Isolated Input Levels | Logic 0 ≤ 1 V; Logic 1 = 3.5 – 30 V |
| Isolation Voltage | 5000 Vrms |
| Non‑Isolated Input Levels | Programmable; default Low = 0.8 V, High = 2.4 V |
| Programmable Digital Filter | 4 µs – 1.02 ms (high/low width) |
| Frequency Measurement Gate | 0.1 s / 1.0 s selectable |
| Digital Outputs | 2 × open‑collector, 30 V max, 30 mA sink |
| Alarm Comparator | Independent per counter channel |
| Power Supply | +10 V – +30 V DC (unregulated) |
| Power Consumption | 2.0 W (typical) |
| Isolation Protection | 5000 Vrms between I/O and logic |
| Watchdog Timers | Internal 150 ms; Host 100 ms – 25.5 s |
| Operating Temperature | −10 °C – +70 °C |
| Storage Temperature | −25 °C – +80 °C |
| Case Material | ABS plastic with EMI shielding |
| Mounting | DIN‑rail or panel mount |
| Dimensions / Weight | Compact NuDAM form factor (~72 × 122 × 35 mm, approx. 200 g) |
### 4. Functionality
Operating Principle:
Each ND‑6080 channel can operate as a pulse counter or frequency meter. In counter mode, the module increments a 32‑bit register on each valid input transition, optionally gated by an external signal. In frequency mode, the module counts pulses within a fixed gate period (0.1 s or 1 s) to compute frequency in Hz. The microcontroller processes the input, applies digital filtering, and communicates results to the host via ASCII commands over RS‑485.
Use Cases and Applications:
- Industrial process monitoring (flow meters, turbine sensors, encoders)
- Machine cycle counting and production line event logging
- Rotational speed or RPM measurement
- Pulse‑based energy or utility metering
- Laboratory instrumentation requiring frequency analysis
- Integration with PLCs, SCADA, or PC‑based control systems
Compatibility:
Fully compatible with other NuDAM‑6000 modules (analog I/O, digital I/O, communication converters). Controlled via ADLINK’s NuDAM Administration Utility or any host supporting ASCII serial communication.
### 5. Components & Accessories
Included Components:
- ND‑6080 module with integrated screw‑terminal block
- User documentation (NuDAM‑6000 User’s Guide)
- Mounting hardware for DIN‑rail or panel installation
Connectors and Pin Assignments:
| Pin | Signal | Description |
|----------|-------------|----------------|
| 1 | IN0 | Non‑isolated input, Counter 0 |
| 2 | GATE0 | External gate control, Counter 0 |
| 3 | GND | Ground for non‑isolated input |
| 4 | IN1 | Non‑isolated input, Counter 1 |
| 5 | GATE1 | External gate control, Counter 1 |
| 6 | DEFAULT* | Initialization pin (connect to GND for default state) |
| 7 | (Y) DATA+ | RS‑485 data line (+) |
| 8 | (G) DATA‑ | RS‑485 data line (–) |
| 9 | (R) +Vs | Power input +10 – +30 V DC |
| 10 | (B) GND | Power ground |
| 11–18 | Differential IN± and GATE± pairs for isolated mode |
| 19 | DO0 | Digital Output 0 / Counter 0 Alarm |
| 20 | DO1 | Digital Output 1 / Counter 1 Alarm |
Optional Accessories:
- RS‑232 ↔ RS‑485 converter (ND‑6520)
- USB ↔ RS‑485 converter (ND‑6530)
- RS‑485 repeater (ND‑6510)
- Termination resistors (120 Ω ± 2 %)
- Shielded twisted‑pair communication cable
### 6. Installation & Setup
Requirements:
- Host computer or controller with RS‑232/USB port and NuDAM converter
- 10 – 30 V DC regulated power supply
- Shielded twisted‑pair cable for RS‑485 bus
- Proper network termination (120 Ω at both ends)
Mounting Options:
- DIN‑rail clip or panel screw mounting
- Ensure adequate ventilation and isolation from high‑voltage sources
Configuration Procedure:
1. Initialization:
Connect the DEFAULT* pin to GND and power ON to enter default state (Address 00, 9600 bps, checksum disabled).
2. Assign Address and Baud Rate:
Use the “Set Configuration” command `%(OldAddr)(NewAddr)(TypeCode)(BaudRate)(ChecksumFlag)` to assign unique ID and communication parameters.
3. Network Integration:
Connect DATA+ and DATA– lines in parallel with other NuDAM modules; observe polarity.
4. Termination:
Install 120 Ω resistors at both ends of the RS‑485 bus.
5. Software Setup:
Use NuDAM Administration Utility to verify communication, read configuration, and test inputs/outputs.
Wiring Notes:
- For isolated mode, use differential pairs (IN±, GATE±).
- For TTL mode, use single‑ended IN0/IN1 and GND.
- DO0/DO1 open‑collector outputs require external pull‑up or load to +Vs (max 30 V).
### 7. Performance & Capabilities
Counting Performance:
- 32‑bit resolution ensures long‑duration counting without overflow.
- Overflow flag and maximum count value programmable via commands.
- External gate allows synchronized counting or time‑window control.
Frequency Measurement:
- Gate‑time selectable (0.1 s / 1 s) balances speed and accuracy.
- Frequency range 1 Hz – 20 kHz with 1 Hz resolution at 1 s gate.
Digital Filtering:
- Programmable high/low pulse‑width thresholds (4 µs – 1.02 ms).
- Eliminates spurious transitions and contact bounce.
Alarm Functionality:
- Independent alarm limit per counter.
- When enabled, DO0/DO1 assert on threshold crossing.
- Alarms can be read, enabled/disabled, or cleared via commands.
Output Control:
- DO0/DO1 can be manually set/reset for general digital control.
- Open‑collector design supports external relays, LEDs, or logic inputs.
Limitations:
- Maximum input frequency 20 kHz; minimum pulse width > 5 µs.
- Non‑isolated TTL inputs limited to 0–5 V range.
- DO outputs limited to 30 V / 30 mA sink.
### 8. Standards & Compliance
- Electrical Isolation: 5000 Vrms tested isolation between field and logic circuits.
- Communication Standard: EIA RS‑485 compliant, 2‑wire half‑duplex multi‑drop.
- EMI/ESD Protection: Transient voltage suppressors (TVS) and PTC resettable fuses.
- Environmental Protection: Conformal‑coated PCB for humidity and chemical resistance.
- CE Class A Conformity: Meets EMC requirements for industrial environments.
- Safety: Designed for 24 V DC industrial control systems.
- RoHS Compliance: Lead‑free manufacturing (per ADLINK policy).
### 9. Additional Information
Warranty:
One‑year limited warranty against defects in materials and workmanship from date of purchase. Warranty excludes damage from misuse, modification, or operation beyond specifications.
Technical Support:
ADLINK provides comprehensive documentation, NuDAM Administration Utility software, and firmware updates. Support is available via ADLINK’s global service network.
Maintenance:
- Periodically inspect wiring and terminal tightness.
- Keep module free from dust and moisture.
- Avoid exposure to strong magnetic fields or high‑voltage transients.
- Firmware updates and configuration backups recommended during system maintenance.
Firmware & Command Interface:
The ND‑6080 uses a simple ASCII command/response protocol over RS‑485. Key command categories include:
- Configuration: Set/read address, baud rate, checksum.
- Counter Control: Start/stop, clear, read value (HEX/DEC), set initial/max count.
- Frequency Mode: Select gate time, read frequency.
- Filter & Threshold: Enable/disable filter, set min pulse width, set TTL trigger levels.
- Alarm Management: Enable/disable alarms, set/read alarm limits, read alarm status.
- Digital Output: Set/read DO values.
- Watchdog & Safety: Configure host watchdog timeout and safe output states.
Example Commands:
- Read counter 0 value (HEX): `#30 0<CR>` → `>0000FFFF<CR>`
- Set TTL input high trigger to 3 V: `$30 1H30<CR>`
- Enable alarm on counter 1: `@30 EA1<CR>`
- Clear counter 0: `$30 60<CR>`
Software Tools:
NuDAM Administration Utility (Windows) provides graphical configuration, monitoring, and calibration functions. It supports automatic module discovery, parameter editing, and command testing.
Maintenance Calibration:
No periodic calibration required for digital counting; verify input thresholds and filter settings during system commissioning.
### Summary
The ADLINK NuDAM ND‑6080 is a robust, high‑precision counter and frequency input module engineered for distributed data acquisition networks. With dual 32‑bit counters, programmable filtering, alarm outputs, and full RS‑485 connectivity, it provides a flexible solution for pulse‑based measurement and control tasks in industrial automation, process monitoring, and laboratory instrumentation. Its combination of high isolation, configurable logic thresholds, and comprehensive command set ensures reliable operation in demanding environments while maintaining seamless integration with other NuDAM‑6000 modules and host systems.
