Introduction
The MGate MB3170 and MB3270 are Modbus gateways with 1 and 2 connections respectively, which convert between the Modbus TCP, ASCII and RTU communication protocols. The gateways enable serial-to-Ethernet communication as well as serial (master) to serial (slave) communication. In addition, the gateways support the simultaneous connection of serial and Ethernet masters with serial Modbus devices. The MGate gateways of the MB3170 and MB3270 series can access up to 32 TCP masters/clients or establish a connection to up to 32 TCP slaves/servers. Routing via the serial ports can be controlled via IP address, TCP port number or ID assignment. Routing the serial ports by TCP port and IP address allows access by up to 4 TCP clients/masters (MB3270 models), while routing by ID mapping allows access by up to 32 TCP clients/masters (MB3170/MB3270). A priority control function enables immediate response to urgent commands. All models are robust, DIN rail mountable and offer optional built-in optical isolation for serial signals.

Integration of TCP masters without changing the Modbus RTU/ASCII network or software
The MB3270 can integrate Modbus TCP with Modbus RTU/ASCII without changing the existing Modbus RTU/ASCII architecture or software. With the serial redirector function, a serial master can gain direct access to serial slave devices via a specially assigned serial port. This allows serial and TCP masters to access serial slaves simultaneously.

Fibre optics for Ethernet communication
The MGate MB3170 series includes 100BaseFX fibre optic models that support transmission distances of up to 4 km for multimode models and up to 40 km for singlemode models. Fibre optic cables are well suited to industrial applications as they are immune to electromagnetic interference. In environments where high ground loop voltages occur, fibre offers the best insulation protection, and because there is no risk of sparking, fibre is safer than copper wire in hazardous environments.

Auto-device routing for easy configuration
Moxa’s auto-device routing feature helps eliminate many of the problems and inconveniences faced by engineers who need to configure a large number of Modbus devices. A single mouse click is all it takes to set up a slave ID routing table and configure Modbus gateways to automatically recognise Modbus requests from a Supervisory Control and Data Acquisition (SCADA) system. Since the slave ID routing table no longer needs to be created manually, the auto device routing function saves engineers a lot of time and money.

Priority control for urgent commands
As Modbus networks grow in size and complexity, the delay time between commands and responses becomes a major problem. Advanced models of the MB3000 series offer a priority control function for urgent commands, allowing the user to force certain commands to receive an immediate response. Depending on the requirements of your system, different methods are available to determine which commands are prioritised.

MGate MB3170-M-SC
MGate MB3170/MB3270 series
Advanced Modbus gateway with 1 port and 1 100BaseF(X) multimode fibre port (SC connectors), 0 to 60°C operating temperature

Ethernet interface
-10/100BaseT(X) ports (RJ45 connector):2 (1 IP, Ethernet cascade), Auto MDI/MDI-X connector
-Magnetic isolation protection: 1.5 kV (built-in)
-Optical Fibre

Ethernet Software Features
-Industrial Protocols:
Modbus TCP Client (Master)
Modbus TCP Server (Slave)

-Configuration Options:
Web Console (HTTP/HTTPS)
Device Search Utility (DSU)
MGate Manager
MCC Tool
Telnet Console

-Management:
ARP
DHCP Client
DNS
HTTP
HTTPS
SMTP
SNMP Trap
SNMPv1/v2c/v3
TCP/IP
Telnet
UDP
NTP Client

-MIB: RFC1213, RFC1317
-Time management:NTP Client

Security functions
-Authentication: Local database
-Encryption:
HTTPS
AES-128
AES-256
SHA-256
-Security protocols: SNMPv3,HTTPS (TLS 1.2)

Serial interface
-Number of ports: 1
-Connection: DB9 connector for RS-232 and terminal block for RS-422/485
-Serial standards: RS-232/422/485 (software selectable)
-Baud rate: 50 bps to 921.6 kbps
-Data bits: 7, 8
-Parity:
None
Even
Odd
Space
Mark
-Stop bits: 1, 2
-Flow Control: DTR/DSR, RTS Toggle (RS-232 only), RTS/CTS
-Pull High/Low Resistor for RS-485:1 kilo-ohm, 150 kilo-ohm
-Terminator for RS-485: 120 ohm
-RS-485 data direction control: ADDC (automatic data direction control)

Serial signals
-RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
-RS-422: Tx+, Tx-, Rx+, Rx-, GND
-RS-485-2w: Data+, Data-, GND
-RS-485-4w: Tx+, Tx-, Rx+, Rx-, GND

Serial software functions
-Industrial protocols:
Modbus RTU/ASCII Master
Modbus RTU/ASCII Slave

Modbus (Transparent)
-Max. Max. number of client connections: 32
– Max. number of server connections: 32 Max. number of server connections: 32

Power supply parameters
-Input voltage: 12 to 48 VDC
-Input current: 510 mA @ 12 VDC
-Power connection: 7-pin terminal strip

-Relay
-Current carrying capacity of the contacts: Resistance load: 1 A @ 30 VDC

Physical properties
-Housing: Plastic
-IP protection class: IP30
-Dimensions (with ears): 29 x 89.2 x 124.5 mm (1.14 x 3.51 x 4.90 in)
-Dimensions (without ears): 29 x 89.2 x 118.5 mm (1.14 x 3.51 x 4.67 in)
-Weight: 360 g (0.79 lb)

Environmental conditions
-Operating temperature: 0 to 60°C (32 to 140°F)
-Storage temperature (including packaging): -40 to 85°C (-40 to 185°F)
-relative humidity: 5 to 95% (non-condensing)

Standards and certifications
-EMC: EN 55032/35
-EMI: CISPR 32, FCC Part 15B Class A
-EMS:
IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 2 kV
IEC 61000-4-5 Surge: Power: 2 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
IEC 61000-4-11
-Hazardous areas:
ATEX
Class I Division 2
IECEx
-Maritime: DNV
-Free-fall: IEC 60068-2-32
-Shock: IEC 60068-2-27
-Vibration: IEC 60068-2-6, IEC 60068-2-64
-Safety: UL 60950-1, IEC 60950-1, EN 62368-1, UL 508

MTBF
Time: 1.580,051 hours
Standards: Telcordia SR332