4 Channel Relay Module DMB 96800

4 independent power relays, Modbus RTU

  • 4 independent power relays
  • Programmable switch-ON and switch-OFF behavior
  • Extensive programmable operating functions
  • Protective 5-way separation up to 300 V AC/DC, test voltage 3 kV
  • Status indication for each relay
  • In-Rail-Bus Connector for Modbus and power supply
  • Extremly slim, only 6.2 mm installation width
  • Made in Germany, 5 Years Warranty

The Modbus 4-channel relay module can be used to switch four electrically isolated relays via a Modbus interface. Various time functions can be used to influence the switching behaviour. All parameters can be set via Modbus RTU Interface. A subset of the most common settings is available via DIP switches.

The 5-way isolation guarantees reliable decoupling of the outputs from the processing circuit and the auxiliary power circuit. Auxiliary power and Modbus RTU must be connected via the In-Rail-Bus connector (see accessories).

Technical Data


Relay 1, 2, 3, 4 250 V AC / 30 V DC / 2 A
Indication Yellow LED for each channel on front panel


Protocol Modbus RTU (RS485)
Module addressing 1 to 247
Response delay 1 to 1000 ms
Baudrate 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
Configuration Parity: Even, Odd, None with 2 Stop bits, None with 1 Stop bit
Connectivity Up to 247 DRAGO Modbus devices without additional repeater (1/8 Load)
Indication Yellow LED on front panel

General Data

Test voltage 3 kV AC, 50 Hz, 1 min., All Relays against each other and against Modbus/power supply
Protection against dangerous body currents1) Protective Separation by reinforced insulation acc. to DIN EN 61010-1 up to 300 V AC/DC for overvoltage category II and contamination class 2 between input and Modbus/power supply
Ambient temperature Operation: -25 °C to +70 °C (-13 to +158 °F)
Transport and storage: -40 °C to +85 °C (-40 to +185 °F)
Power supply 24 V DC, voltage range 16.8 V to 31.2 V DC, approx. 0.7 W
EMC2) EN 61326-1
Construction 6.2 mm (0.244") housing, protection type: IP 20, mounting on 35 mm DIN rail acc. to EN 60715
(captive plus-minus clamp screws)
Solid: 0.5 mm2 - 4 mm2 / AWG 20-12
Fine-stranded: 0.5 mm2 - 2.5 mm2 / AWG 20-14
Stripped length: 6-8 mm / 0.28 in
Screw terminal torque 0.8 Nm / 7 lbf in
Weight Approx. 70 g
  1. As far as relevant the standards and rules mentioned above are considered by development and production of our devices. In addition relevant assembly rules are to be considered by installation of our devices in other equipment. For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance or insulation between adjacent situated devices.
  2. Minor deviations possible during interference

Block diagram

<p>Modbus 4-Kanal Relais Modul DMB 96800<br>Modbus 4 Channel Relay Module DMB 96800</p>



Terminal assignments

1   Relay 1
2   Relay 1
3   Relay 2
4   Relay 2
5   Relay 3
6   Relay 3
7   Relay 4
8   Relay 4
A   Modbus A
B   Modbus B
C Power supply
D + Power supply


Product line

Product Order No.
Modbus 4 Channel Relay Module,
In-Rail-Bus for power supply and Modbus connection
DMB 96800 B
In-Rail-Bus see accessories  
Subject to change!
Webinfo 4 Easy

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