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9-2
Digital I/O Port, Interlocks, and Pulse Sync Output
Digital I/O port
The Model 2520 has a digital input/output port that can be used to control external digital
circuitry.
Port configuration
The Digital I/O Port is located on the rear panel and is shown in
standard male DB-9 connector is used for the Digital I/O port.
Figure 9-1
Digital I/O port
1 = Digital Output #1
2 = Digital Output #2
3 = Digital Output #3
4 = Digital Output #4
5 = Ground
6 = SOT (Start-of-Test) Input
7 = +5V
8 = Not Connected
9 = Ground
Digital output lines
The port provides four output lines and one input line. Each open-collector output can be
set high (+5V) or low (0V). Each output line can source up to 2mA or sink up to 500mA.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
MADE IN
U.S.A.
PULSE
SYNC
!
OUT
TRIGGER LINK
TESTHEAD
CONN 1
!
!
TESTHEAD
CONN 2
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING.
1
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
DIGITAL I/O
RS-232
LINE FUSE
SLOWBLOW
1.6A, 250V
LINE RATING
100-240VAC
50, 60Hz
140VA MAX.
Model 2520
Model 2520 User's Manual
Figure
9-1. Note that a
5
9
6
IEEE-488
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