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PRODUCT SUMMARY – TAR‑120‑M12
Comprehensive Technical Description (~12,000 characters)

1. Product Overview
• Product Name: TAR‑120‑M12
• Model Number: TAR‑120‑M12
• Series: ORing EN50155 Industrial Cellular VPN Router
• Article Number: TAR‑120‑M12
• Manufacturer: ORing Industrial Networking Corp. (Taiwan)
The TAR‑120‑M12 is an EN50155‑certified industrial wireless access point and cellular VPN router engineered for rolling stock, railway, transportation, and other harsh‑environment applications. It integrates IEEE 802.11b/g WLAN, a built‑in HSUPA cellular modem, two M12‑connector Ethernet interfaces, and extensive security, VPN, routing, and management capabilities. Its rugged IP40 metal enclosure and M‑series connectors ensure reliable networking under vibration, shock, and wide temperature conditions.

2. Key Features
• Industrial‑grade router with EN50155 compliance for rolling‑stock use
• Integrated HSUPA cellular modem supporting GSM/GPRS/EDGE/WCDMA/HSDPA/HSUPA
• IEEE 802.11b/g WLAN interface with link speeds up to 54 Mbps
• Dual 10/100Base‑T(X) Ethernet ports on M12 (D‑coding), auto‑MDI/MDI‑X
• Redundant dual 12–48 VDC power inputs using an M23 connector
• Robust IP40 metal casing, DIN‑rail or wall‑mount options
• Secure wireless access with WEP, WPA, WPA2, WPA‑PSK/WPA2‑PSK, 802.1X, RADIUS, TKIP, AES
• Integrated VPN support: OpenVPN (server & client), PPTP (server & client)
• Firewall functions: IP filtering, MAC filtering, NAT, DMZ, port triggering, virtual servers, UPnP
• Event notification: Email, Syslog, SNMP Trap, fault relay, beeper
• HTTPS secure management, intuitive web GUI
• Cellular failover option for WAN redundancy
• M12/A‑coding relay output (3 A @ 24 VDC)
• Auto MDI/MDI‑X, DHCP server/relay, DDNS support
• Compliant with EMI/EMS, vibration, shock, and safety standards

3. Technical Specifications
Dimensions & Weight
• Size: 125 mm (W) × 65 mm (D) × 196 mm (H)
• Weight: approx. 0.95 kg (950 g)

Mechanical & Material
• Housing: Metal, IP40 protection
• Connectors: M12 (D‑coding for Ethernet, A‑coding for relay), M23 (power)
• Mounting: DIN‑rail or wall mount

Electrical Characteristics
• Power Input: Dual 12–48 VDC (typical 24 VDC) via M23 connector
• Power Consumption: ~5.8 W typical
• Reverse Polarity Protection: Present
• Relay Output: 3A @ 24 VDC (M12 A‑coding)

Environmental
• Operating Temperature: –20°C to +70°C
• Storage Temperature: –40°C to +85°C
• Humidity: 5%–95% non‑condensing
• Cooling: Passive (per EN60068‑2‑1 and EN60068‑2‑2)

Wireless LAN (IEEE 802.11b/g)
• Frequency Bands:
– FCC: 2.412–2.462 GHz (11 channels)
– CE/ETSI: 2.412–2.472 GHz (13 channels)
• Modulation:
– 802.11b: CCK, DQPSK, DBPSK
– 802.11g: OFDM with BPSK, QPSK, 16QAM, 64QAM
• Data Rates:
– 802.11b: 1/2/5.5/11 Mbps
– 802.11g: 6/9/12/18/24/36/48/54 Mbps
• Transmit Power: 20 dBm max (802.11b/g)
• Receiver Sensitivity:
– –81 dBm @ 11 Mbps, PER < 8%
– –64 dBm @ 54 Mbps, PER < 10%
• Antennas:
– 2.4/5.8 GHz WLAN antennas via reverse SMA, 2 dBi typical

Cellular Interface (HSUPA modem)
• Standards: GSM/GPRS/EGPRS/EDGE/WCDMA/HSDPA/HSUPA
• Band Options:
– Dual‑band HSUPA: 1900/2100 MHz
– Quad‑band GSM/GPRS/EDGE: 850/900/1800/1900 MHz
– WCDMA/HSDPA: 850/900/1900/2100 MHz
• Cellular Antenna: Reverse SMA, 2 dBi
• SIM Card Slot: 1 (note: router must be powered down before inserting SIM)

Ethernet
• 2 × 10/100Base‑T(X) via M12 D‑coding
• Auto‑negotiation, auto MDI/MDI‑X
• M12 4‑pin D‑coding pinout:
– Pin 1: RD+
– Pin 2: TD+
– Pin 3: RD–
– Pin 4: TD–
• Supported cable: Cat 3/4/5/5e UTP, up to 100 m

4. Functionality
Operation Modes
• Wireless: AP mode, AP client, Client mode, Bridge mode
• WAN: Static/Dynamic IP, PPPoE, Modem/3G (HSUPA), Wireless client mode
• VPN: OpenVPN server/client, PPTP server/client
• DHCP: Server, Relay, IP allocation mapping
• NAT: Virtual server, DMZ, port triggering, UPnP/NAT‑PMP
• Security: Firewall (IP/MAC filtering), RADIUS authentication

Use Cases & Applications
• Railway and rolling‑stock connectivity
• Vehicle networking, fleet management, transportation ITS
• Industrial WLAN coverage with cellular WAN redundancy
• Remote access via VPN tunnels over cellular
• DIN‑rail industrial control integration
• Applications requiring rugged communications under shock/vibration

Compatibility
• Works with standard WLAN clients (802.11b/g)
• Supports OpenVPN clients (v2.0.9 compatible)
• Compatible with industrial M12 cabling systems
• DHCP environments, RADIUS servers, SNMP, Syslog, DDNS providers

5. Components & Accessories
Included (depending on SKU)
• WLAN antennas (reverse SMA)
• Cellular antenna (reverse SMA)
• SIM card slot integrated
• Relay output M12 connector
• M12 Ethernet ports (no RJ‑45 ports)
• Quick Installation Guide & documentation

Optional
• External RF cables/antennas
• M12 to RJ45 Ethernet cables
• DIN‑rail brackets or custom mounting accessories

6. Installation & Setup
• Mounting: Wall‑mount or DIN‑rail installation
• Power: Dual 12–48 VDC inputs via M23 connector
• SIM installation requires power‑off condition
• Configure via LAN or WLAN; default gateway IP: 192.168.10.1
• Default login: admin / admin
• Setup via web interface (HTTP/HTTPS), includes WAN, LAN, DHCP, wireless security, VPN, routing, and system tools
• Firmware upgrade via web interface; must avoid power interruption

7. Performance & Capabilities
• WLAN throughput up to 54 Mbps
• Cellular WAN performance dependent on HSUPA network quality
• Firewall and NAT throughput suitable for industrial remote access scenarios
• Dual Ethernet switch mode allows Daisy Chain networking to reduce switch port usage
• Failover capability with WAN ↔ cellular backup
• VPN tunnels support encrypted remote connectivity (OpenVPN, PPTP)

Limitations
• WLAN limited to 802.11b/g (single‑band; no 802.11n/ac)
• IP40 enclosure; not waterproof without added protection
• Cellular modem performance depends on operator coverage

8. Standards & Compliance
Railway & Industrial Standards
• EN50155 railway standard
• EN50121‑3‑2 EMI
• EN61373 shock & vibration
• IEC60068‑2‑27 shock
• IEC60068‑2‑6 vibration
• IEC60068‑2‑32 free fall
• EN60068‑2‑1 cooling
• EN60068‑2‑2 dry heat

EMI/EMS
• FCC Part 15
• CISPR/EN55022 Class A
• EN61000‑4‑2 ESD
• EN61000‑4‑3 RS
• EN61000‑4‑4 EFT
• EN61000‑4‑5 surge
• EN61000‑4‑6 CS
• EN61000‑4‑8 magnetic field immunity
• EN61000‑4‑11 voltage dips

Safety
• EN60950‑1

Networking Protocol Support
• ICMP, IP, TCP, UDP, DHCP, BOOTP, ARP/RARP, DNS
• SNMP MIB‑II, SNMPv1/v2, Traps, private MIB
• HTTPS, SSH
• RADIUS
• STP (IEEE 802.1D)

9. Additional Information
Warranty
• Manufacturer warranty: 3 years (industrial‑grade ORing standard)

Support & Maintenance
• Firmware updates available via management interface
• Supports configuration backup/restore, factory reset
• SNMP monitoring, Syslog export, email alerts
• Fault relay output for hardware failure indication

Updates
• Web‑based firmware upgrade with safety lockout
• NTP synchronization capability for accurate system logs

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