ALR121-S53 Yokogawa Communication Module

ALR121-S53 Yokogawa Communication Module | New & Original Stock

Availability: 99 left in stock

Yokogawa ALR121-S53 CENTUM Series Serial Communication Module The Yokogawa ALR121-S53, also cataloged as the ALR121 Serial Communication Module, operates as...

SKU: ALR121-S53

Manufacturer: Yokogawa
Product No.: ALR121-S53
Product Type: Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 340g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa ALR121-S53 CENTUM Series Serial Communication Module

The Yokogawa ALR121-S53, also cataloged as the ALR121 Serial Communication Module, operates as a dedicated hardware component for serial data translation between the Field Control Station (FCS) and subsystems within CENTUM VP, CS3000, and ProSafe-RS FIO platforms.

Hardware Specifications

Parameter	Specification
Model	ALR121-S53
Brand	Yokogawa
Origin	Japan
Weight	0.34 kg
Dimensions	Standard FIO slot form factor
Operating Temp	0 to +60 deg C (Standard environmental limits; alternative listings specify -40 to +70 deg C based on suffix options)
Power Consumption	Current Consumption: 0.5 A (Alternatively specified as 230 mA @ 5 VDC, 540 mA @ 24 VDC variant paths)
System Configuration	Serial Communication Module supporting RS-422/RS-485 physical layer interfaces
Communication Paths	Point-to-point or multipoint architecture topologies
Signal Input Adaptation	S53 version acts as standard serial handler (Pure analog conversion data maps 16 channels, 4-20 mA, voltage, TC, RTD inputs)
Channel Isolation	Channel-to-channel and channel-to-system galvanic isolation (1500 VAC for 1 minute)
Signal Precision	+-0.1% of span (at 25 deg C), +-0.2% over full temperature range
Suffix Protocol	-S Standard type, no explosion protection, non-HART native processing

Process Control & DCS Instrumentation Properties

The Yokogawa ALR121-S53 implements rigorous channel-to-channel isolation circuits to intercept common-mode voltage spikes and prevent ground loop cross-talk across its network layout. The hardware processes multi-drop RS-422/RS-485 data blocks or standard analog signal distributions without loading down central backplane processors. When handling raw sensor inputs, the internal logic utilizes built-in cold junction compensation (CJC) to balance raw thermocouple drifts, executing real-time open-circuit wire diagnostics while blocking signal distortion down to a typical 10 ms update rate.

Frequently Asked Questions

Q: Does the ALR121-S53 module provide direct HART loop protocol pass-through to the master DCS?

A: No, the S53 version is standard non-Explosion protected and does not process digital HART data overlay packets. For full HART device diagnostics and asset management communications, you must install the alternative H suffix variant module (ALR121-H53).

Q: What are the installation restrictions regarding unassigned input channels on the termination block?

A: Unused analog tracking channels must be physically short-circuited at the terminal block interface or explicitly set to disabled in the system builder workspace. Leaving unassigned loops open allows electrostatic fields to generate induction noise, causing false diagnostic faults.

Q: How is primary loop power distributed to passive two-wire field transmitters when utilizing this module?

A: The module functions as an isolated signal sink interface and lacks integrated power supply rails for external loop circuits. Transmitters operating on a two-wire structure require external power distribution blocks or a dedicated powered terminal board assembly to drive the current path.

Field Installation Guidelines

FIO Slot Interlocking: Align the module frame with the active slot paths of the CENTUM FIO backplane. Press firmly to achieve complete connector seat compliance, then lock the physical retention screws to secure a dependable chassis ground.
Serial Link Shield Grounding: Route all RS-422/RS-485 communication or analog field wiring using high-integrity twisted-pair, double-shielded copper cable. Connect the shield drain wire exclusively to the designated cabinet earth grounding bus to prevent ground loops.
Signal Track Separation: Ensure all serial data wires and low-voltage input loops (such as millivolt lines or RTD inputs) retain a physical separation of no less than 30 cm from high-amperage AC supply tracks, motor starters, or inductive switching arrays.
Termination Torque Constraints: Secure all field conductors at the pressure clamp terminal block using calibrated screwdrivers. Loose terminal seating raises local circuit resistance, degrading the conversion accuracy across the 10 ms signal evaluation span.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.