Product Description
Product Overview
The Yokogawa ALR121-S53 S1 is a Serial Communication Module designed for RS-422/RS-485 communication with 2 ports. This interference-free module ensures no disruption to the safety loop, making it suitable for critical industrial applications.
Hardware Specifications
The hardware specifications for the ALR121 module are as follows:
| Item | ALR121 |
|---|---|
| Interface | RS-422/RS-485 (4-wire system) |
| Connection Method | Point-to-point (RS-422) Multipoint (RS-485) |
| Communication Function | Half-duplex |
| Synchronization Method | Start-stop synchronization |
| Transmission Speed | 1200/2400/4800/9600/19200/38400 bps |
| Transmission Code | Binary |
| Character Length | 8 bits (Fixed to 8 bits on the Modbus slave communication function and the subsystem communication function) |
| Stop Bit Length | 1/2 bits (Fixed to 1 bit on the subsystem communication function) |
| Parity Check | None/even/odd |
| Lag Time After Data Transmission | 1 ms |
| Transmission Distance | Maximum 1200 m (total extended length) |
| Installation Method | Mounted on SSC60◻, SSC50◻, SSC57◻, SSC10◻, or SNB10D (*1) |
| I/O Wiring | Cable with 3-pair shield, AKB161, or AKB162 |
| Wiring Connection | Clamped with terminal block’s M4 screws (5 poles × 2 ports) |
| Communication Function (*2) | Modbus slave communication function, subsystem communication function |
| Current Consumption | 0.5 A |
| Weight | Approx. 0.34 kg |
Model and Suffix Codes
The ALR121-S53 S1 Serial Communication Module is specified as follows:
| Category | Details |
|---|---|
| Model | ALR121 Serial Communication Module (RS-422/RS-485, 2 port) |
| Suffix Codes |
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