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Yokogawa ALR121-S00 Serial Communication Module


  • ALR111: RS-232C
  • ALR121: RS-422/RS-485

Connection Method:

  • ALR111: Point-to-point
  • ALR121: Point-to-point (RS-422) or multipoint (RS-485)

Communication Function:

  • Half-duplex

Synchronization Method:

  • Start-stop synchronization

Transmission Speed (bps):

  • 1200/2400/4800/9600/19200/38400 (Note: Speed depends on communication function, subsystems, and connection method.)

Transmission Code:

  • ASCII/binary

Character Length:

  • 7/8 bits

Stop Bit Length:

  • 1/2 bits

Parity Check:

  • None/even/odd

Lag Time After Data Transmission:

  • 1 ms (Time to start receiving data again after transmission.)

Transmission Distance:

  • Maximum 15 m (for RS-232C)
  • Maximum 1200 m (total extended length, for RS-422/RS-485)

Installation Method:

  • Mounted on ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, or AFV40

I/O Wiring:

  • Use AKB131, AKB132, AKB133, AKB134 cables or cable with 3-pair shield (AKB161 or AKB162)
  • Wiring connection via D-sub-9-pin (female x 2) or clamped with terminal block’s M4 screws (5 poles x 2)

Current Consumption:

  • 0.5A


  • 0.3 kg
Related Tags:
Is our price competitive?
Topbrands collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
What is the warranty period?
We offer a standard one-year warranty for all new and original items.
What payment methods do we accept?
We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
What is the warranty period?
We offer a standard one-year warranty for all new and original items.
What shipping methods do we use?
We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
What is our delivery time?
Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
How do we package the goods?
Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
How can customers contact us and request a quote?
Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.

Topbrands PLC Limited is a top supplier of genuine new PLC and DCS parts, serving over 50 countries globally. We offer high-quality products from renowned brands like Bently Nevada, Honeywell, ABB, and more. With our warehouse in China stocking up to 30,000 pieces, we ensure rapid delivery to meet urgent order needs while maintaining competitive pricing to save our customers' budgets. Learn more...

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