MR-Multi I/O Modbus RTU

Description

The Modbus module MR-Multi I/0 is a compact and rapidly to install solution to connect digital and analog signals from the actor and sensor level directly to a control unit in building automation via Modbus RTU protocol. 29 I/Os, some of them are configurable, are available for different tasks. With strong inductive loads, we recommend protecting the relay contacts with an RC element. The inputs and outputs can be switched and scanned by means of standard registers via a Modbus master. Module address, bit rate and parity are set with two rotary switches on the front or by software. Suitable for decentralized mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.

Technical Data

General Data

Protocol

Modbus RTU

Address range

00 to 99

Bus interface

RS485 (two-wire bus)

Transmission rate

1200 to 115200 bit/s

Operating voltage

24 V AC/DC / +/- 10% (SELV)

Current consumption

220 mA (AC) / 110 mA (DC)

Relative duty cycle

100 %

Inputs / digital

11 x Optocoupler,galvanically isolated

Input / S0

1 x per DIN EN 62053-31, Class A

Inputs analog

configurable

for resistance or

6 x 40 Ohm to 4 MOhm

for voltage

6 x 0 to 10 V DC

Input / current

1 x analog 0 to 20 mA DC

Outputs / Relay

4 x changeover (4PDT) / 250 V AC / 6 A

Outputs / PhotoMOS

4 x 24 V DC / 100 mAgalvanically isolated

Outputs / voltage

2 x analog 0 to 10 V DC / 5 mA,galvanically isolated

Dimensions (WxHxD)

125 x 93 x 60.81 mm, 7 TE, TH35

Weight

385 g

Operating temperature

-5° to +55°C

Storage temperature

-25° to +70° C

Protection class

IP20

Check US distributor inventory

Accessory of

MR-GW
Modbus RTU / Modbus TCP Gateway

MR-F-GW
Modbus RTU / Modbus TCP Gateway

Part number

Part number:

11084313

EAN:

4251122198786

Downloads

Brochure (Data logger)
Brochure (Modbus Gateway - Network connection of Modbus RTU fieldbus components)
Brochure (Modbus RTU components)
3D-Data - Registration required -
Mounting note (11084313 MR-Multi I/O)
Mounting note (Safety Instructions multilingual )
Data sheet
ePLAN data - Registration required -

FAQ's

What can I do if the red ERROR LED on the module lights up or there is no communication?

There are several possible causes, please check the following:

- Operating voltage (A1 / A2) connected and sufficient for the device.
- BUS (A- / B+) connected and not reversed. Pay attention to (- / +), not to A/B.
- Address (rotary switches) set correctly, must not occur twice or be 0.
- Bit rate and parity (rotary switches) set correctly, only possible in programming mode (see mounting note).
- Shielded and twisted pair cable used.
- Termination resistor (120 Ω) set on both sides.
- Bias resistors available on the BUS.
- Timeout high enough for all participants to respond (approx. 10 ms).

What can I do if the red ERROR LED on the module lights up or there is no communication?

There are several possible causes, please check the following:

- Operating voltage (A1 / A2) connected and sufficient for the device.
- BUS (A- / B+) connected and not reversed. Pay attention to (- / +), not to A/B.
- Address (rotary switches) set correctly, must not occur twice or be 0.
- Bit rate (rotary switches) set correctly, only possible in programming mode (see mounting note).
- Shielded and twisted pair cable used.
- Termination resistor (120 Ω) set on both sides.
- Bias resistors available on the BUS.
- Max Master as high as the number of physical master I/Os on the BUS.
- Max Frame high enough for all answers from participants to get through (BMT-RTR setting).

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Additional Information