model: 72em2-m4 - M
MODEL: 72EM2-M4
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
72
(2.83)
80
(3.15)
ETHERNET
RUN
SEND
FIELD
RS-485
CNFG
149
(5.87)
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
PWB connector: MSTB2.5/4-GF-5.08AU
Cable connector: MSTB2.5/4-STF-5.08AU
(Applicable wire size: 0.2 - 2.5 mm2, stripped length 7 mm)
Recommended solderless terminal
AI0.25-6BU 0.25 mm2 (Phoenix Contact)
AI0.34-6TQ 0.34 mm2 (Phoenix Contact)
AI0.5-6WH 0.5 mm2 (Phoenix Contact)
AI0.75-6GY 0.75 mm2 (Phoenix Contact)
AI1-6RD 1.0 mm2 (Phoenix Contact)
AI1,5-6BK 1.5 mm2 (Phoenix Contact)
Power input: M3.5 screw terminal
Screw terminal: Chromated steel (standard) or stainless
http://www.m-system.co.jp/
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 RS485.
■ 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
72EM2-M4 SPECIFICATIONS
ES-6731 Rev.5 Page 1/4
MODEL: 72EM2-M4
RS-485
Protocol: Modbus RTU
Response timeout: 10 – 10000 msec. (configured by PC)
Configuration: Bus type multi-drop
Standard: Conforms to RS-485, EIA
Communication: Half-duplex, asynchronous, no procedure
Baud rate: 4.8 k or 9.6 k or 19.2 k or 38.4 kbps; default =
38.4 kbps (Start/Stop bit: 1 bit; Data bit: 8 bits; Parity: Odd)
Transmission distance: 500 meters max.
Transmission media: Shielded twisted-pair cable (CPEV-S
0.9 dia.)
INSTALLATION
Power consumption
•AC: Approx. 10 VA
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 20 to 70 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 450 g (0.99 lb)
PERFORMANCE
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute
(Ethernet or FG to RS-485 to power)
500 V AC @ 1 minute (Ethernet to FG)
EXTERNAL VIEW
RJ-45 Modular Jack
RS-485
Connector
ETHERNET
RS-485
RUN
SEND
T1
FIELD
Operation Indicator LED
T2
T3
T4
CNFG
Configurator Jack
DIP SW (behind the cover)
CONNECTION DIAGRAM
Ethernet Hub / Transceiver **
RJ-45 MODULAR JACK
10BASE-5
Cable
THIS DEVICE
STP Cable
RJ-45 MODULAR JACK
Term.
Resist.
T1
T2
T3
T4
+
–
Shielded Twisted-pair Cable
To Other
I/O Modules
Jumper*
7 U
POWER
14 V
8
FG ***
*
When the 72EM2 unit is located at an end of transmission line via twisted-pair cable (= when there is no cross wiring),
close across the terminal 2 – 11 with the jumper attached to the product.
Remove the jumper for all other units.
** Install the 72EM2 and the Ethernet Hub/Transceiver inside the same panel.
In order to extend outside the panel, use a 10BASE-5 cable.
*** Ground inside the same panel where the 72EM2 is installed.
http://www.m-system.co.jp/
72EM2-M4 SPECIFICATIONS
ES-6731 Rev.5 Page 2/4
MODEL: 72EM2-M4
■ CONNECTION EXAMPLE
HOW TO CONNECT R3 AND R5 SERIES
R3-NM1
R5-NM1
THIS DEVICE
T1
T2
T3
T4
+
–
DA
DB
DG
SLD
FG
Jumper*
FG
*Refer to * in CONNECTION DIAGRAM
*1. For other models, refer to each specification sheet and manual.
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)
CLAMP
(top & bottom)
20
(.79)
7.8 (.31)
ETHERNET
DIN RAIL
35mm wide
RS-485
RUN
SEND
FIELD
7 14 6
5 12 4
T1
3
80 (3.15)
T3
T4
2–4.5 (.18) dia.
MTG HOLE
25 (.98) deep
14–M3.5
SCREW
10(.39)
72 (2.83)
109 (4.29)
139 (5.47)
80 (3.15)
35.4 (1.39)
T2
CNFG
8
9 15 10
1 11 2
60 (2.36)
[3.3 (.13)]
72 (2.83)
MOUNTING REQUIREMENTS unit: mm (inch)
92 (3.62)
60 ± .2
(2.36 ± .01)
60 ± .2
(2.36 ± .01)
http://www.m-system.co.jp/
2–M4 SCREW
72EM2-M4 SPECIFICATIONS
ES-6731 Rev.5 Page 3/4
MODEL: 72EM2-M4
SYSTEM CONFIGURATION EXAMPLES
PC Recorder Software
STP Cable
Switch / Hub
STP Cable
(10BASE-T, 100BASE-TX)
Communication
Adaptor
72EM2-M4
ETHERNET
ETHERNET
RUN
SEND
FIELD
RS-485
RUN
SEND
FIELD
CNFG
CNFG
RS-485
Communication
Adaptor
72EM2-M4
R3 / R5 / R6 /
R7 Series etc.
RS-485
RS-485
Network module
R3-NM1, R5-NM1
R6-NM1, R6-NM2
Remote I/O modules (R7M etc.)
Max. 31 nodes*
* The number of nodes actually connected is limited by setting range of the module.
Specifications are subject to change without notice.
http://www.m-system.co.jp/
72EM2-M4 SPECIFICATIONS
ES-6731 Rev.5 Page 4/4
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