CP332D Yokogawa CENTUM VP Datasheet & Technical Manual

ALR121-SE1-S1 RS-422/RS-485 Yokogawa Serial Communication Module

ALR121-SE1-S1 RS-422/RS-485 Yokogawa Serial Communication Module

Disponibilidad: 10 Quedan en stock

YOKOGAWA ALR121-SE1-S1 Serial Communication Module The YOKOGAWA ALR121-SE1-S1, also cataloged as the ALR121 RS-422/RS-485 module, operates as a dedicated hardware...

Código: ALR121-SE1

Manufacturer: Yokogawa
Product No.: ALR121-SE1
Product Type: Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Descripción Reseñas

YOKOGAWA ALR121-SE1-S1 Serial Communication Module

The YOKOGAWA ALR121-SE1-S1, also cataloged as the ALR121 RS-422/RS-485 module, operates as a dedicated hardware component for serial data exchange between Field Control Stations (FCS) or Safety Control Stations (SCS) and external subsystems within DCS networks.

Hardware Specifications

Parameter	Specification
Model	ALR121-SE1-S1
Brand	Yokogawa
Origin	Japan
Weight	0.30 kg
Dimensions	7.7 cm x 4.2 cm x 10.6 cm
Operating Temp	Standard DCS environment
Power Consumption	0.5 A
Interface	RS-422 / RS-485
Transmission Speed	1200 to 38400 bps
Max Distance	1200 m

Process Control and Communication Connectivity

The ALR121-SE1-S1 module executes data transmission via half-duplex, start-stop synchronization for seamless integration with third-party PLCs and intelligent field instruments. It provides critical channel-to-channel isolation to protect the internal DCS backplane from external electrical surges common in multi-point RS-485 serial networks. By supporting configurable parity, character length, and stop-bit settings, the module enables precise protocol matching for Modbus RTU or proprietary serial subsystems. Effective signal integrity is maintained through the use of shielded, multi-pair cabling, which minimizes latency and electromagnetic interference during long-distance transmission.

Frequently Asked Questions

Q: Can this module be hot-swapped while the FCS/SCS is operational?

A: Yes, the ALR121 series supports online module replacement, provided the specific system rack and firmware version allow for hardware hot-swapping. Ensure the associated port is software-disabled before physical removal to prevent bus communication errors.

Q: What is the maximum transmission distance for an RS-485 configuration?

A: The module supports a maximum transmission distance of up to 1200 meters. Performance is dependent on the baud rate, cable capacitance, and the proper termination of the RS-485 bus at both physical ends.

Field Installation Guidelines

Mounting: Install the module into the designated slot on the AFV30/40, A2FV50/70, or ANB10/11 rack. Ensure the locking tabs are fully engaged to guarantee a solid connection to the backplane bus.
Wiring: Use AKB161 or AKB162 shielded 3-pair cables. Connect field wires to the 5-pole terminal block using M4 screws. Tighten to industry-standard torque to prevent vibration-induced loosening.
Shielding: Ground the cable shield at the designated terminal point. Avoid routing serial communication cables in parallel with high-voltage AC power lines to mitigate noise interference.
Configuration: Verify communication parameters (baud rate, parity, data bits) in the system configuration software before initiating data exchange.

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