---
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title: "MR-SI4 Modbus module with 4 S0 inputs"
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MR-SI4 MODBUS RTU - Modbus module with 4 S0 inputs

## MR-SI4 MODBUS RTU

The Modbus module with 4 S0 inputs according to DIN EN 62053-31 class A has been developed for decentralized switching tasks. It is suitable for counting S0 meter pulses. This allows optimal integration of the module into an energy control system.
In case of power failure, the last meter readings are saved. 
The inputs can be scanned via standard registers using a Modbus master. 
The module address, bit rate, and parity are set with two rotary switches on the front side or via software. 
Suitable for decentralized mounting on DIN rail TH35 according to IEC 60715 in electrical distribution cabinets.

## Technical Characteristics

| Protocol | Modbus RTU |
|---|---|
| Address range | 00 to 99 |
| Bus interface | RS485 (2-wire bus) |
| Transmission speed | 1200 to 115200 bit/s |
| Operating voltage | 24 VAC/DC ± 10% |
| Current consumption | 170 mA (AC) / 65 mA (DC) |
| Relative duty cycle | 100 % |
| Inputs | 4 x S0, class A |
| Display | Green, red and yellow LED |
| Dimensions (W x H x D) | 35 x 69.3 x 60 mm |
| Weight | 83 g |
| Operating temperature range | -5 °C to +55 °C |
| Storage temperature range | -20 °C to +70 °C |
| Ingress protection for housing / terminal block     | IP40 / IP20 |

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Source: https://shop.marcomweb.it/en/modbus/mr-si4-modbus-module-with-4-s0-inputs

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.