Model 6220/6221 Reference Manual Limit Test and Digital I/O 9-5
Return to Section 9 topics
Digital I/O port
Digital I/O connector
The Model 622x Digital I/O port is a male DB-9 connector located on the rear panel.
The port location and pin designations are shown in Figure 9-2. The four active-low,
digital output lines and one input line are used to control external circuitry.
Figure 9-2
Digital I/O port
Typical applications for the digital I/O port include the following:
• External device control — Each digital output can be used as a control
switch for an external device (i.e., relay) circuit. Each output line can sink up
to 500mA. Drive voltage is provided by an external source (+5V to +33V to
pin 5 VEXT).
• Logic Control — The four digital outputs can be used as inputs to logic
devices.
+5V output
The digital I/O port provides a +5V output that can be used to drive external logic
or relays. Maximum current for this line is 500mA. This line is protected by a self-
resetting fuse (one hour recovery time).
!
!
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
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.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
MADE IN
U.S.A.
INTERNALLY
SWITCHED
1 AMP MAX.
HI
CABLE
GUARD
105Vpk
LO
105Vpk
250Vpk
OUTPUT
CAT I
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
ETHERNET
10/100 BaseT
10bT 100bT
DIGITAL I/O
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
1.6A, 250V
LINE RATING
100-240VAC
50, 60Hz
120VA MAX.
250Vpk
105Vpk
LO
GUARD
INTERLOCK
9876
54321
DIGITAL I/O
1 = Digital Output #1
2 = Digital Output #2
3 = Digital Output #3
4 = Digital Output #4
5 = VEXT
6 = SOT*
7 = +5V (Fused)
8 = Not Used
9 = Digital Ground
*Start of Test (SOT) provides Alternate
Method of Triggering (See Section 8).
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
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