INSTALLATION
SETUP
3 - 4
I-E96-308A
®
Setting Preamplifier Select Switches S2 and S3
Use switches S2 and S3 to route the channel 1 and channel 2
inputs through preamplifiers on the DSM. S2 and S3 route low
level input signals. With a preamplifier switched in, the respec-
tive input will register a logic 1 for a differential voltage of 25
millivolts peak, and allows inputs of up to 5 volts peak. Figure
shows the position of S2 and S3 on the DSM. To use a
preamplifier for an input, move its slide switch to the in posi-
tion, shown in Figure
. S2 switches the preamplifier in or
out of input channel 1 and S3 switches the preamplifier in or
out of input channel 2.
If you switch the preamplifiers into either input, select range 2
with the voltage selection jumper for that input channel. The 24
volts DC I/O power must be connected to the termination unit
as described in the appendix for the termination unit used.
Input Jumper Settings
Jumpers J-1 through J-8 set the input voltage levels and
jumpers J-9 through J-16 set the DC voltage response time
(speed). The DC inputs have two propagation (speed) choices to
allow for debounce time: a slow response setting (8.5 millisec-
ond debounce time) or fast response setting (no debounce
time). There are three terminals at each jumper location. Refer
to Tables
and
to select the jumper settings for your
application; place a jumper across the pins shown in the table.
Figure
shows the location of the jumpers on the DSM.
CAUTION
Damage to the DSM may result if you select voltage range 1 for
an input using a preamplifier.
ATTENTION
La selection de la gamme 1 de tension dans le cas d'une entree
utilisant un preamplificateur pourrait entrainer des dommages
au module DSM.
Table 3-2. Voltage Jumpers Selections
Input Channel
Jumper
Range 1
Connection
Range 2
Connection
1
J1
A
B
2
J2
A
B
3
J3
A
B
4
J4
A
B
5
J5
A
B
6
J6
A
B
7
J7
A
B
8
J8
A
B
Range 1: logic 0 = 0 to 1 VDC; logic 1 = 4 to 6 VDC
Range 2 : logic 0 = 0 to 2 VDC; logic 1 = 21.6 to 27 VDC
