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8 outputs (24 V DC positive)
Connections: RS232 port
8 yellow LEDs (output status
20-position
621-9939 | Honeywell - Serial Link Module 16mm Eddy Current Sensor 8 outputs (24 V DCOverview 621 9939 is a Honeywell Serial Link Module (SLM) for controlling serial I O data transfer to and from remote I O, operating asynchronously with its own processor and data table. Installation Slots: L M (12 modules) Channels Serial I O channels: 2 Termination resistors: Required at both ends of each channel
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