PA4400B Search Results

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Text: Safety Monitoring Relays SR231A SR231A For full product information, visit www.sti.com. Use the SpeedSPEC Code for quick access to the specific web page. Dual-Channel Safety Monitoring Relay • Power requirements—the SR231A will accept 24 VDC • Inputs—The SR231A is designed to monitor two magnetically encoded noncontact switches with 1 N/C and 1 N/O contacts