ALR121-S51 Yokogawa Serial Module RS-422/485

Yokogawa ALR121-S51 Serial Communication Module

Technical Specifications

• Brand: Yokogawa
• Model: ALR121-S51
• Interface: RS-422 / RS-485 (4-wire system)
• Connection: Point-to-point (RS-422), Multipoint (RS-485)
• Transmission Distance: Maximum 1200 m (total extended length)
• I/O Cable: 3-pair shielded cable, AKB161, or AKB162
• Wiring: Clamped with M4 screws on a 5-pole terminal block (×2)
• Current Consumption: 0.5 A
• Weight: 0.3 kg

Frequently Asked Questions

• Is this module new and original? Yes, we supply 100% new, original Yokogawa ALR121-S51 modules.
• Do you have stock available? Yes, we maintain ample stock for prompt shipment.
• What is your shipping policy? We ship within 5 business days via FedEx, UPS, or DHL.
• Can I return the module? Yes, we accept returns within 30 days of delivery.
• What is the maximum transmission distance? The ALR121-S51 supports up to 1200 meters total cable length.
• Which communication protocols does it support? It handles ASCII and binary with half-duplex start-stop synchronization.
• Is the module compatible with RS-485 multipoint networks? Yes, it supports multipoint (RS-485) and point-to-point (RS-422).

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628

Partner NexAuto Technology Limited: https://www.nex-auto.com/