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MR-DI10 Modbus RTU

906165
909358
913882
913884
913886
913888
870635
909360
Description

The Modbus module with 10 digital inputs was developed for decentralized switching tasks. It is suitable for detecting potential-free switch states, for example electrical limit switches on vent valves or auxiliary contacts of power contactors. The inputs can be used as contact or voltage inputs. The inputs can be scanned by means of standard registers via a Modbus master. Module address, bit rate and parity are set with 2 rotary switches on the front or by software. Suitable for decentralized mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.

  • Connection with screw type terminal blocks
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Technical Data
General Data
Modbus RTU
00 to 99
RS485 (two-wire bus)
1200 to 115200 bit/s
24 V AC/DC +/- 10 % (SELV)
85 mA (AC) / 75 mA (DC)
100 %
10 x digital
30 V AC/DC
more than 7 V AC/DC
Green, red and yellow LED
35 x 69.3 x 60 mm
83 g
-5 °C to 55 °C
-20 °C to 70 °C
IP40 / IP20
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Accessories
873544
Terminal block Type 259
777960
HUB DC
906226
Power supply NG4 24 V DC
905881
Typ 135 RIACON 135_3.5
Accessory of
952520
MR-GW
Modbus RTU / Modbus TCP Gateway
952521
MR-F-GW
Modbus RTU / Modbus TCP Gateway
Part number
1108311319
4250184135609
Downloads
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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