PLX31-PND-MBS4 Product Photo

PROFINET® Device to Modbus® Serial Gateway with four serial ports


The PROFINET device to Modbus Serial gateway offers bi-directional data transfers between a PROFINET Controller and Modbus serial (RTU and ASCII) devices. Each Modbus serial port can be configured as either a Modbus master or slave. The PROFINET interface operates as a PROFINET device (slave).

The PLX31-PND-MBS4 gateway is a stand-alone DIN-rail mounted unit that provides Ethernet connectivity for network communications, remote configuration, and diagnostics. The onboard SD Card slot (SD card optional) is used for storing configuration files that can be used for recovery, transferring the configuration to another gateway, or general configuration backup.


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Caractéristiques Avantages

  • PROFINET v2 certification with PROFINET class A compliance
  • Field-proven with thousands of Modbus serial devices, and multiple PROFINET controllers from multiple vendors
  • Remotely view and diagnose Modbus and PROFINET networks
  • Remote configuration via the free, intuitive, ProSoft Configuration Builder (PCB) software
  • Each Modbus serial port supports master or slave mode
  • Secure module configuration via module switch (v1.04 and greater)
  • Up to 10,000 16-bit registers can be used to exchange large amounts of data.


PROFINET Specifications



Driver Type

Class A Device


1440 bytes IN, 1440 bytes OUT

Exchange Types

Cyclic Real-time (RT) and Acyclic Data


Modbus Serial Specifications

Command List

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

Supported Modbus Function Codes

1: Read Coil Status

2: Read Input Status

3: Read Holding Registers

4: Read Input Registers

5: Force (Write) Single Coil

6: Preset (Write) Single Holding Register

15: Force (Write) Multiple Coils

16: Preset (Write) Multiple Holding Registers

22: Mask Write Holding Register (slave only)

23: Read/Write Holding Registers (slave only)

Software configurable communication


Baud rate: 110 baud to 115.2 kbps

Parity: None, Even, Odd
Data Size: 7 or 8 bits
Stop bits: 1 or 2

RTS on/off delay: 0 to 65535 milliseconds

Modbus Modes: RTU with CRC-16 or ASCII with LRC error checking

Floating Point Data supported, support for Enron and Daniel

Polling of Command List

Configurable polling of command list, including continuous and on change of data

Status Data

Error codes available on an individual command basis. In addition, a slave status list is maintained per serial port

Node Address

1 to 247 (software selectable)

RS Interface

RS232, RS422, and RS485






Hardware Specifications



Power Supply

24 VDC nominal
10 to 36 VDC allowed
Positive, Negative, GND Terminals

Current Load

24 VDC nominal @ 300 mA

10 to 36 VDC @ 610 mA maximum

Operating Temperature

-25°C to 70°C (-13°F to 158°F )

Storage Temperature

-40°C to 80°C (-40°F to 176°F )

Relative Humidity

5% to 95% RH with no condensation


IEC 60068-2-27; 15G @ 11ms, 3-Axis (Operational)

IEC 60068-2-27; 30G @ 18ms, 3-Axis (Non-Operational)


IEC 60068-2-6; 5G @ 10 to 150 Hz


5.38 x 1.99 x 4.38 in, 13.67 x 5.05  x 11.13 cm (H x W x D)

LED Indicators

For configuration and protocol status errors

Ethernet Port


*10/100Mbit RJ45 Connector Electrical Isolation 1500 Vrms at 50 to 60 Hz for 60 seconds, 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

Number of Serial Ports


Shipped With Each Unit

2.5 mm screwdriver, J180 Power Connector, DB9 to Screw Terminal Adapter


ATEX Letter of Conformity 107,32 kB Dernière Modification 12/05/2022
CB Safety 348,30 kB Dernière Modification 20/10/2022
Korean KC Registration 974,32 kB Dernière Modification 07/07/2020
Profibus/Profinet Certificate 325,89 kB Dernière Modification 22/05/2015
Declaration of Conformity (RoHS/CE) 114,24 kB Dernière Modification 01/06/2022
Country Approval - Eurasian Customs Union Conformity (EAC) (Wired) 1,92 MB Dernière Modification 10/07/2020
UL Certificate of Compliance 233,35 kB Dernière Modification 16/11/2022