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The GV-IO card with 12-point digital inputs provides an interface for your external devices such as sensors and detectors.
55-IO12O-300 Geovision GV-IO 12-Out Card
55-IOCRD-310 Geovision GV-NET I/O V3 - 4 Alarm Inputs & 4 Relay Outputs plus RS485 to RS232 Converter w/ USB Support-DISCONTINUED
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