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Overview
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Specifications
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Downloads
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Overview
Moxa MGate MB3170-M-ST-G2 – Advanced 1-Port Modbus Gateway with Multi-Mode ST Fibre
The MB3170-M-ST-G2 connects Modbus RTU/ASCII serial devices to Modbus TCP systems over
multi-mode ST fibre, supporting 4 km transmission. It offers transparent or agent-mode
conversion for low-latency SCADA data access and robust EMI-immune networking.
- Networking 1 × multi-mode ST fibre + 1 × RJ45 Ethernet for long-distance, noise-resistant data exchange
- Modes Transparent or Agent (poll & cache) for flexible performance
- Security HTTPS (TLS 1.2), SNMPv3, AES/RSA/ECC encryption; IEC 62443-4-1 compliant
- Reliability Dual 12–48 V DC power, relay output, metal IP30 housing (−10 to 60 °C)
- Ease of Use Web console, DSU, MXconfig, one-click diagnostics for fast configuration
Built for industrial sites requiring fibre-backed Modbus integration with strong security and
long-distance reliability.
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Specifications
Technical Specifications
Networking
- 1 × 100BaseFX multi-mode ST fibre (up to 4 km, 1300 nm)
- 1 × 10/100BaseT(X) RJ45 (auto MDI/MDI-X, 1.5 kV magnetic isolation)
- Ethernet cascade or dual-subnet modes (software selectable)
Serial Interface
- Ports: 1 (DB9 male)
- RS-232/422/485 (software-selectable)
- Baud: 50 bps–921.6 kbps; Data bits 7/8; Parity None/Even/Odd/Space/Mark; Stop bits 1/2
- Flow control: RTS/CTS, DTR/DSR, RTS Toggle
- RS-485: ADDC auto direction; software-selectable 120 Ω termination and 1 kΩ/150 kΩ bias
- Isolation: None (“I” variants add 2 kV)
Protocol & Performance
- Modbus TCP Client/Server; Modbus RTU/ASCII Client/Server; Proprietary serial (agent mode)
- Modes: Transparent or Agent (poll & cache)
- Connections: 32 clients & 32 servers; 128 commands; 150 tags / 2048 B tag memory
Management & Security
- Web console (HTTP/HTTPS), Device Search Utility, MXconfig, MXview One
- SNTP client; MIB-II (RFC1213, RFC1317)
- HTTPS (TLS 1.2), SNMPv3; AES-128/256, RSA (1024–4096 bit), ECC-256/384/521, SHA-256/384, HMAC
Power & I/O
- 12–48 V DC dual redundant inputs; ≈ 452 mA @ 12 V DC
- Relay output: 1 A @ 30 V DC (resistive load)
Physical & Environmental
- Metal housing, IP30; DIN-rail or wall mount
- Dimensions: 25 × 89 × 132 mm (with ears) / 25 × 89 × 129 mm (without DIN kit)
- Weight: 338 g
- Operating temperature: −10 to 60 °C; Humidity: 5–95 % non-condensing
Certifications & Reliability
- EN 61000-6-2/-6-4, CISPR 32, IEC 61000-4-2/-3/-4/-5/-6/-8/-11
- EN/UL 62368-1; ATEX, IECEx, Class I Div 2, DNV (pending)
- MTBF: ≈ 2 889 487 hours (Telcordia SR-332); Warranty: 5 years
Ordering
- MB3170-M-ST-G2 – 1 × 100BaseFX multi-mode ST + 1 × RJ45 Ethernet, 1 × DB9 serial, −10 to 60 °C
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Downloads