Yokogawa ALR121 Serial Communication Module

FAQ

Q1: What communication interfaces does the ALR121 support?
A1: The ALR121 supports RS-422 and RS-485 interfaces, suitable for point-to-point and multipoint connections.

Q2: What is the maximum communication distance of the ALR121?
A2: When using RS-485, the communication distance can reach up to 1200 meters (total length).

Q3: Does the ALR121 support multiple communication protocols?
A3: Yes, it supports FA-M3, Modbus, MELSEC-A, YS, SLC500, and PLC-5 protocols.

Q4: What transmission speeds are available for the ALR121?
A4: It supports multiple speeds: 1200 / 2400 / 4800 / 9600 / 19200 / 38400 bps.

Q5: Can the ALR121 be configured for dual-redundant communication?
A5: Yes, dual-redundant communication is supported by configuring two identical modules in adjacent slots.

Q6: Are there any installation requirements for the ALR121?
A6: Yes, it must be installed in specified node units, such as ANB10, ANB11, ANR10, AFF50, or AFV series.

Q7: What are the dimensions and weight of the ALR121?
A7: The dimensions are 126.7 × 32.8 × 130 mm, and the weight is approximately 0.3 kg.

Q8: What parity options are available on the ALR121?
A8: The ALR121 offers None, Even, and Odd parity options.

ALR121 Serial Communication Module Yokogawa

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