
2- 12 Agilent B1500 User’s Guide, Edition 7
Introduction
Rear View
8. GNDU terminal
0 V constant voltage source. Used for the reference of measurement ground.
Triaxial conn
ector.
9. LAN interface
RJ45 connector.
10. USB interfaces
USB, 2 ports. For keyboard, mouse, or peripherals. USB keyboard and USB
mo
use are availab
le as option.
11. Ext Trig terminals
Two BNC connectors, one for trigger input, and one for trigger output. For
details abo
ut the trigger function, see Programming Guide.
12. Digital I/O terminal
DSUB 25 pin connector. Can be used for the trigger input/output terminals or an
interface to control
an external relay circuit and so on. For details, see
Programming Guide. This connector is also used to connect Agilent 16445A
selector adapter.
13. Interlock terminal
Used in conjunction with the interlock function of the B1500A. If the Interlock
terminal is op
en, maximum SMU output is limited to ±42 V. Be sure to connect
this terminal to the 16442B test fixture or connector plate before performing
measurement. If you use a connector plate, you must install an interlock circuit.
For details on how to install the interlock circuit, see “To Make an Interlock
Circuit” on page 3-29.
WARNING Dangerous voltage of up to the maximum voltage of SMUs may be present at
force, guard, and sense terminals if the Interlock terminal is closed.
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