
Agilent B1500A/B1505A Programming Guide, Edition 11 2-65
Remote Mode Functions
Module Selector
External Relay Control Output
The External Relay Control Output connector is designed for controlling an external
relay switching. Use the ERHPE and ERHPR commands to use the external relay
control.
The ERHPE command enables the external relay control function.
The ERHPR command controls the logical state of the Relay control output pin.
Figure 2-37 External Relay Control Output Connector
Connector type D-sub 15 pin connector
Relay control signal output pins Relay control 1 to 6
Relay control signal level Normally 0 V (circuit common, in logical OFF
state) or 12 V (in logical ON state)
Relay control input current Typical 100 mA/pin, maximum 500 mA/pin
Figure 2-38 External Relay Control Output Internal Circuit
12 V
Circut common (0 V)
Circut common (0 V)
Circut common (0 V)
Relay control
1
6
54 3
2
Control signal
External Relay Control Output connector
12 V
Relay control 1, 2, 3, 4, 5, or 6
Circuit common (0 V)
Part of module selector
Digital I/O connector
External relay
100 mA/pin (typical)
500 mA/pin (maximum)
Allowable input current:
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