Keithley 6485, User Manual, Page: 53 / 115

Model 6485 and 6487 User’s Manual Connections 2-13
Figure 2-13
Model 6487 interlock connections
120
LINE RATING
50, 60Hz
50 VA MAX
INPUT
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
IEEE-488
CAT I
TRIGGER LINK RS-232
MADE IN
U.S.A.
ANALOG OUT DIGITAL I/O
505V
MAX
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI INTERLOCK
Interlock
!
!
FUSE LINE
630mAT
(SB)
100 VAC
120 VAC
315mAT
(SB)
220 VAC
240 VAC
505V PK
505V PK
505V PK
Model 6487
Interlock
Connector
Interlock
Connector
Interlock
Cable
Pin 1
Pin 2
Test Fixture
Normally
Open
Switch
Interlock Asserted
(Output Inhibited)
with Open Switch
Test Fixture
How is the interlock different between a Model 487 and Model 6487?
The Model 487 uses a 3-pin DIN interlock connector, while the Model 6487 uses a 4-pin
DIN for the interlock
connection.
The Model 487 interlock prevents voltage source output only with the Model 236-ILC-3
cable connected. Without the cable connected, the Model 487 allows voltage source out-
put on the 50V or 500V ranges. The Model 6487 will prevent voltage source output for the
50V or 500V ranges unless pins 1 and 2 are connected through an external switch by the
customer. The Model 6487 will allow 10V range output by factory default without the
external interlock connection but can be configured to require the external interlock con-
nection.