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Card Connections and Installation
4-4
The voltage source jumper is located on the connector board
as shown in Figure 4-2. Figure 4-5 shows how the plug-in
jumper is installed on J201.
Figure 4-5
Voltage source jumper installation
Pull-up resistors
When interfacing outputs to high-impedance devices (i.e.,
logic devices), pull-up resistors are used to achieve the appro-
priate logic level. These resistors are installed at the factory.
Configuring digital I/O output logic
Referring to Figure 4-6 for the digital I/O output logic loca-
tion, perform the following steps to configure J101:
1. If mated together, separate the relay card from the con-
nector card by removing the mounting screw and then
pulling the two cards away from each other. Remember
to only handle the cards by the edges and shields to
avoid contamination.
2. Locate J101 on the relay board. Refer to Figure 4-6.
3. Determine if you require positive (high) or negative
(low) logic.
4. Install the plug-in jumper in the appropriate position as
shown in Figure 4-7.
Figure 4-6
Digital I/O output logic location
Figure 4-7
Digital I/O output logic selection
Jumper
+5V
VEXT
A. External Source Selected
Jumper
+5V
VEXT
B. 5V Source Selected
W
ARNING: USER SUPPLIED LETHAL
VOL
TAGES MA
Y
BE
PRESENT ON CONNECT
ORS OR P
.C. BOARD.
OUTPUT LOGIC
INPUT LOGIC
HIGH
LOW
DOWN
UP
J101
J100
Jumper
High
Low
A. High Selected
Jumper
High
Low
B. Low Selected
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