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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

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
 (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
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.
Battery: Lithium-metal battery (model: CR14250SE-P1-1); Non-replaceable

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

RS-485
Protocol: Modbus RTU
Response timeout: 10 – 10000 msec. (configured by PC)
Configuration: Bus type multi-drop
Standard: Conforms to TIA/EIA-485-A
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

CONNECTION DIAGRAM

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

MOUNTING REQUIREMENTS unit: mm (inch)

SYSTEM CONFIGURATION EXAMPLES

M-System Co., Ltd.