General description
The M7IX is a Modbus RTU slave module with 7 opto-coupled digital inputs and RS-485 communication. Available in two versions depending on the input type:
- M7IX-L: 12–48 V AC/DC inputs.
- M7IX-H: 230 VAC inputs.
Key features
- Communication: Modbus RTU over RS-485.
- 7 opto-coupled digital inputs with galvanic isolation.
- ESD protection on all inputs, power supply and communication bus.
- 32-bit counters for each input.
- Time counters since last state change for each input.
- Independent digital filter per input (0–5000, 0.128 ms resolution).
- Communication loss detection (configurable TimeOut).
- 480 free EEPROM registers for user data.
- 134 free RAM registers for user data.
- DIN rail mounting.
Communication
| Parameter | Value |
|---|---|
| Standard | RS-485 |
| Protocol | Modbus RTU |
| Modules per network | Up to 128 |
| Baud rates | 300 – 153,600 |
| Parity | None, even, odd, mark, space |
| Addresses | 1 – 254 |
Configuration is done via 10 DIP switches accessible under the cover (address, baud rate and parity) or through internal registers via Modbus for advanced settings.
Electrical ratings
| Description | Min | Normal | Max | Unit |
|---|---|---|---|---|
| Power supply | 10 | 12–24 | 26 | VDC |
| Module consumption | — | 25 | 30 | mA |
| Input voltage (M7IX-L) | 10 | 12-24-48 | 50 | VAC/VDC |
| Input voltage (M7IX-H) | 100 | 230 | 300 | VAC |
| Input current (M7IX-L) | 3 | 3.6-7.6-15.6 | 16.2 | mA |
| Input current (M7IX-H) | 3 | 6.5 | 9 | mA |
Connections
Two module versions are available depending on the input type:
- M7IX-L: Inputs can be AC or DC, from 12 V to 48 V.
- M7IX-H: Inputs are AC only, from 100 VAC to 300 VAC.
All inputs share a common terminal. Being opto-coupled, galvanic isolation of over 1 KV is guaranteed between the communication bus and the input power supply. The power supply and communication bus are ESD protected up to 5 KV.