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5102-Serial

Modbus Serial Port Expander

5102-MBS3-MBM

The ProLinx Modbus Serial Port Expander module allows you to attach up to three separate Modbus master devices to a single Modbus slave.

The module is designed to act as a multiplexer, allowing simultaneous connections from multiple Modbus masters to a single Modbus slave. A common use for the module is to have an HMI panel and a SCADA application all communicating to the same Modbus slave port of a Modicon processor.

This stand-alone DIN-rail mounted protocol gateway provides a single Modbus Master port and three Modbus Slave ports.

All Modbus serial ports are individually configurable, providing a very powerful and flexible host or device interface solution.

Features and Benefits

Applications

The Serial Port Expander adds three additional slave ports for a Modbus based device. This allows users to connect SCADA software, HMI, and modems to processors simultaneously. Commands from the host devices are passed through the module and routed directly to the front port of the processor. This allows a port on the processor to be expanded to allow communication with a variety of devices at the same time. Typical applications include SCADA software, local operator interface, and wireless concentrator for remote data collection.

The serial port(s) on the gateway can be individually configured to support the Modbus protocol (RTU or ASCII, Baud rate, etc.).

Applications

The Serial Port Expander adds three additional slave ports for a Modbus based device. This allows users to connect SCADA software, HMI, and modems to processors simultaneously. Commands from the host devices are passed through the module and routed directly to the front port of the processor. This allows a processor’s port to be expanded to allow communication with a variety of devices at the same time. Typical applications include SCADA software, local operator interface, and wireless concentrator for remote data collection.

Specifications

The ProLinx Communication Modules provide connectivity for two or more dissimilar network types. The modules, encased in sturdy extruded aluminum, are stand-alone DIN-rail mounted protocol gateways, providing communication between many of the most widely used protocols in industrial automation today.

Hardware

Specification

Description

Power Supply

24 VDC nominal
18 to 32 VDC allowed
Positive, Negative, GND Terminals
2.5 mm screwdriver blade

Current Load

500 mA max @ 32 VDC max

Operating Temperature

-4° F to 122° F (-20° C to 50° C)

Storage Temperature

-40° F to 185° F (-40° C to 85° C)

Relative Humidity

5% to 95% (with no condensation )

Dimensions

Standard:
 5.20 in H x 2.07 in W x 4.52 in D (13.2 cm x 5.25 cm x 11.48 cm)
Extended:
 5.20 in H x 2.73 in W x 4.52 in D
(13.2 cm x 6.934 cm x 11.48 cm)

LED Indicators

Power and Module Status
Application Status
Serial Port Activity
Serial Port Error Status

Configuration Serial Port

DB-9M RS-232 only
No hardware handshaking

Ethernet Port (Ethernet modules only)

10Base-T half duplex RJ45 Connector
Link and Activity LED indicators
Electrical Isolation 1500 V RMS at 50 Hz to 60 Hz for 60 s, applied as specified in section 5.3.2 of IEC 60950: 1991
Ethernet Broadcast Storm Resiliency = less than or equal to 5000 [ARP] frames-per-second and less than or equal to 5 minutes duration

Application Ports

Modbus Plus Connector
Two DB9 Female Standard Modbus Plus connectors

Serial Port Isolation

2500 V RMS port signal isolation per UL 1577
3000 VDC min. port to ground and port to logic power isolation

Shipped with Each Unit

Mini-DIN to DB-9M serial cables
4 ft RS-232 configuration cable
2.5mm screwdriver
CD (docs and Configuration utility)
RS-422/485 DB-9 to Screw Terminal Adaptor (1 or 4, depending on ports)

Downloads

ProSoft Configuration Builder (PCB)
MBS3 MBM Datasheet 67.43 kB Last Modified 04/26/2010
MCM Driver Manual 835.78 kB Last Modified 12/10/2009

Protocols

MCM Protocol Specification


The Modbus protocol driver supports Master and Slave implementations of the protocol. All Modbus serial ports are individually configurable, providing a very powerful and flexible host or device interface solution.


Protocol Specifications

The Modbus driver provides extensive support for both the Master and the Slave implementations of the protocol. The serial port(s) on the gateway can be individually configured to support the Modbus protocol (Master or Slave, RTU or ASCII, Baud rate, etc.).

General Parameters - Modbus Protocol

Communication parameters

Baud Rate: 110 to 115K baud
Stop Bits: 1 or 2
Data Size: 7 or 8 bits
Parity: None, Even, Odd
RTS Timing delays: 0 to 65535 milliseconds

Error Checking

RTU mode (binary) with CRC-16
ASCII mode with LRC error checking

Floating Point

Floating point data movement supported, including configurable support for Enron implementation

Function Codes

1: Read Output Status
2: Read Input Status
3: Read Multiple Data Registers
4: Read Input Registers
5: Write Single Bit
6: Write Single Data Register
15: Write Multiple Bits
16: Write Multiple Data Register

Modbus Master

Command List

Up to 100 command per master port, each fully configurable for function, slave address, register to/from addressing and word/bit count.

Polling of command list

Configurable polling of command list, including continuous and on change of data, and dynamically user or automatic enabled.

Modbus Slave

Node address

1 to 247 (software selectable)


Certifications

CB Safety 35.78 kB Last Modified 08/27/2012
CE Mark 92.34 kB Last Modified 02/28/2013
Russian GOST-R 7.07 MB Last Modified 02/22/2013
GOST-R Declaration of Conformity 6.68 MB Last Modified 02/22/2013
UL/cUL; Class 1, Div 2 1.08 MB Last Modified 07/02/2013
UL/cUL; Class 1, Div 2 (Canada) 1.10 MB Last Modified 07/02/2013