Model 2700 Multimeter/Switch System User’s Manual Limits and Digital I/O 9-5
Digital I/O
Model 2700’s Digital I/O port is accessed at a male DB-9 connector located on the rear
panel. The connector location and pin designations are shown in
Figure 9-2.
Figure 9-2
Digital I/O port
Digital input (trigger link input)
When enabled, the Trigger In (pin 6) and Digital Ground (pin 9) can be used as the trigger
link input for external triggering. Pin 6 is physically connected to the input line (pin 2) of
the TRIG LINK connector.
Pin 8 of the digital I/O is used to enable or disable Trigger In. Trigger In is enabled by
leaving pin 8 open, or pulling it high (+5V). Trigger In is disabled by setting pin 8 low
(0V).
NOTE External triggering is covered in Section 8.
1 = Digital Output # 1 (low limit 1)
2 = Digital Output # 2 (high limit 1)
3 = Digital Output # 3 (low limit 2)
4 = Digital Output # 4 (high limit 2)
5 = Digital Output # 5 (master limit)
6 = Ext Trig (input)
7 = Diode Clamp
8 = Hardware Interlock (input)
9 = Digital (chassis) Ground
DIGITAL I/O
54321
9876
Model 2700
KEITHLEY
SLOT COVER
DIGITAL I/O TRIG. LINK
RS232
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
MADE IN
U.S.A.
!
!
IEEE-488
SLT
2
SLT
1
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