Communication Module Hardware Specifications - ALR121
- Interface: RS-422/RS-485
- 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: ASCII/binary
- Character length: 7/8 bits
- Stop bit length: 1/2 bits
- Parity check: None/even/odd
- Lag time after data transmission: 1 ms
- Transmission distance: Maximum 1200 m (total extended length)
- I/O wiring: Cable with 3-pair shield, AKB161, or AKB162
- Wiring connection: Clamped with terminal block’s M4 screws (5 poles x 2)
- Current consumption: 0.5A
- Weight: 0.3 kg
Here are the suffix codes for different variants:
- -S: Standard type
- -5: No explosion protection
- -E: With explosion protection
- -0: Basic type
- -1: With ISA Standard G3 option
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