ALR111-S01 Yokogawa ALR111 Datasheet & Technical Manual

ALR121-S00 Yokogawa ALR121 RS-422/RS-485 Communication Modules

ALR121-S00 Yokogawa ALR121 RS-422/RS-485 Communication Modules

Disponibilidad: 99 Quedan en stock

YOKOGAWA ALR121-S00 Serial Communication Module Configured for Specific Technical Task in System/Network Name, the YOKOGAWA ALR121-S00 (ALR121 Serial Communication Module)...

Código: ALR121-S00

Manufacturer: Yokogawa
Product No.: ALR121-S00
Product Type: Serial Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 340g
Shipping port: Xiamen
Warranty: 12 months

Descripción Reseñas

YOKOGAWA ALR121-S00 Serial Communication Module

Configured for Specific Technical Task in System/Network Name, the YOKOGAWA ALR121-S00 (ALR121 Serial Communication Module) provides direct physical/electrical execution. This hardware component establishes point-to-point or multi-drop serial networks to link host CENTUM VP, CENTUM CS 3000, and ProSafe-RS control processors with external programmable logic controllers, sequencers, or FA-M3 subsystems. The module drives industrial data transactions through dual onboard RS-422A/RS-485 interfaces, executing half-duplex start-stop synchronization routines to convert electrical bus signaling into structured software variables.

Hardware Specifications

Parameter	Specification
Model	ALR121-S00
Brand	Yokogawa
Origin	Japan
Weight	0.34 kg
Dimensions	127 x 51 x 127 mm
Operating Temp	-20 deg C to +70 deg C
Power Consumption	12.0 W max (Calculated at 24 VDC backplane level, 0.5 A current draw)
Interface Type	RS-422A / RS-485 (2 ports)
Topology	Point-to-point or multi-drop networks
Transmission Speed	1200 / 2400 / 4800 / 9600 / 19200 / 38400 bps
Maximum Distance	1200 m per segment
Physical Connectors	2 x D-sub 9-pin female ports
Environmental Profile	ISA Standard G3 corrosion protection resistance

Process Control & DCS Instrumentation Attributes

The internal communication processor of the ALR121-S00 regulates long-distance Modbus slave protocol execution across differential electrical fields. Designers embedded complete channel-to-channel isolation architecture within the module circuitry to restrict ground loop currents and external voltage imbalances from penetrating the centralized DCS backplane system. This physical layer separation maintains structural data integrity over the maximum 1200 m wire limits while operating in parallel with delicate analog field instrumentation. The hardware enforces a strict post-transmission lag time of exactly 1 ms, managing stable line turnaround periods during ASCII or binary multi-drop sequences without interrupting concurrent 4-20 mA HART loop protocol parameters or cold junction compensation processes active on host field control units.

Frequently Asked Questions

Q: What are the functional limitations when utilizing both communication ports on the ALR121-S00 concurrently?

A: The firmware mandates that both D-sub 9-pin ports execute identical communication functions and baud configurations. The system does not support independent protocol mixing, such as running a Modbus slave link on one port and an asynchronous sequencer link on the other.

Q: How do environmental conditions impact the physical field deployment parameters of this module?

A: This specific suffix configuration contains an ISA Standard G3 conformal coating. The treatment blocks gaseous atmospheric contaminants from attacking the internal copper circuits, allowing deployment in aggressive process environments without premature thermal or electrical breakdown.

Field Installation Guidelines

Ensure the node slot power is completely de-energized prior to inserting the ALR121-S00 assembly into the AFV30, AFV40, A2FV50, A2FV70, ANB10, ANB11, or ANR10 base plates. Slide the hardware smoothly down the guide rails until the backplane contacts engage firmly, then verify the module lock clicks into position. Field technicians must complete multi-drop wiring using compliant AKB131, AKB132, AKB133, or AKB134 shielded cable series. Termination resistors must engage exclusively at the two physical ends of the differential network segments to minimize signal reflections. Route all data cables separate from high-amp AC motor lines or variable frequency drive loops to avoid corrupting half-duplex serial data packets.

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