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2.6.4 EIO4 Card (KX-TDA0164)
External Sensor
Power to the external sensor is provided from the EIO4 card and must be grounded through the EIO4 card as
indicated in the diagram below. A pair of "sensor" and "common" lines are connected to the EIO4 card for each
external sensor. The PBX detects input from the sensor when the signal is under 100 W.
Connection Diagram
PBX
OPB3
EIO4
+5V
10K
I/O
4.7K
4.7K
External Relay
Current Limit: 24 V DC/30 V AC, 1 A maximum
132
Installation Manual
+5V
33
sensor
33
common
External Sensor

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