MODEL: 72EM2-M4

72EM2-M4 SPECIFICATIONS

ES-6731 Rev.7 Page 1/4

http://www.m-system.co.jp/

Gateway 72-UNIT Series

ETHERNET COMMUNICATION ADAPTOR

(Modbus use)

Functions & Features

• Bidirectional protocol converter for Modbus/TCP (Ethernet)

and Modbus RTU (RS-485)

• Fast response time thanks to the Cache functions

• Expansion over 31 nodes is possible using additional

72EM2 units

ETHERNET

RUN

SEND

FIELD

CNFG

RS-485

72

(2.83)

149

(5.87)

80

(3.15)

mm (inch)

MODEL: 72EM2–M4–M2

ORDERING INFORMATION

Code number: 72EM2-M4-M2

POWER INPUT

AC Power

M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,

47 – 66 Hz)

GENERAL SPECIFICATIONS

Construction: Plug-in

Connection

•Ethernet: RJ-45 modular jack

•RS-485: Euro type connector terminal

Uint sid connector: MSTB2,5/4-GF-5,08AU

Cable side connector: MSTB2,5/4-STF-5,08AU

Recommended solderless terminal

•Power input: M3.5 screw terminal

Screw terminal: Chromated steel

Housing material: Flame-resistant resin (black)

Isolation: Ethernet to RS-485 to FG to power

DIP SW Setting: Selection of IP Address and

Maintenance/Normal operation

PC configuration: IP address and transmission speed are

configured via a web browser software (provided by the

user).

Internet Explorer 6.0 or higher

Status indicator

RUN: Green LED light flashes in normal operating

conditions in 1-sec. cycles; 2-sec. cycles when configurating

the unit.

SEND: Green LED light turns on when sending data to

Ethernet.

FIELD: Green LED light turns on when sending data to RS-

485.

■ Modbus RTU

•Nodes: Max. 31

•Supported Commands

Read Coil Status (01)

Read Input Status (02)

Read Holding Registers (03)

Read Input Registers (04)

Force Single Coil (05)

Preset Single Register (06)

Diagnostics (08)

Fetch Comm. Event Counter (11)

Fetch Comm. Event Log (12)

Force Multiple Coils (15)

Preset Multiple Registers (16)

Report Slave ID (17)

■ Cache Commands

Following commands are valid for Cache function.

Read Coil Status (01)

Read Input Status (02)

Read Holding Registers (03)

Read Input Registers (04)

(Up to 100 queries)

ETHERNET COMMUNICATION

Standard: IEEE 802.3u

Transmission type: 10BASE-T, 100BASE-TX

Transmission speed: 10M or 100M bps

(Auto Negotiation)

Protocol: TCP/IP (compatible to Modbus/TCP Standard by

Schneider Automation)

Number of connections: 8

Transmission media:

10BASE-T (STP cable; Category 5)

100BASE-TX (STP cable; Category 5e)

Maximum segment length: 100 meters