Sequoia / Tahoe Series User Manual California Instruments
86 M447352-01 REV-A
4.2 External I/O Control Signal Connector
The Sequoia/Tahoe power supply is provided with an External I/O Control Signal 15-pin connector on the
rear panel. This section contains the setup and operating configuration of Output ON/OFF Status, External
Synchronization, Fault status, Remote inhibit, External Analog Modulation of Output Voltage, and Trigger
Functions. Refer to Figure 4-4 for the connector pin-out diagram and Table 4-1 for connector pin-out
details.
Figure 4-4: External Input/Output Control Connector
Pin # Name Type Range Function
AWG ISO_COM Return Return
Isolated signal return / Common ground terminal for
Pins 4, 5, 11, 12, 13, and 14.
2 SYNC_HIGH
Digital
Input
0-5V
Isolated signal for synchronization of the output to a
logic-high signal transition; paired with Pin-3.
3 SYNC_LOW Return Return
Isolated signal return for synchronization of the output;
paired with Pin-2.
AWG /INHIBIT
Digital
Input
0 VDC
or 5VDC
Isolated inhibit signal to turn the output off/on and
open/close the output relay; signal return on Pin-1.
5 TRIGGER IN
Digital
Input
0-5VDC Isolated trigger signal; signal return on Pin-1.
6
SUMMARY
FAULT
Digital
Output
±12VDC Isolated Summary Fault signal; paired with Pin-7;
AWG
SUMMARY
FAULT RETURN
Return Return Signal return for Summary Fault; paired with Pin-6.
8 N/C N/C N/C N/C
9 N/C N/C N/C N/C
AWG ISO_COM Return Return
Isolated signal return / Common ground terminal for
Pins 4, 5, 11, 12, 13, and 14.
11
OUTPUT
STATUS
Digital
Output
0VDC or
5 VDC
Isolated TTL output; High if the output relay is closed,
low if the output relay is open.
12
MODULATION
REFERENCE - A
Analog
Input
±7.07V External modulation signal input terminal for Phase-A.
AWG
MODULATION
REFERENCE - B
Analog
Input
±7.07V External modulation signal input terminal for Phase-B.
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