DL8000 Preset Instruction Manual
3-16
Modules
Revised February-2016
Figure 3-14
displays the field wiring connections to the output circuit of
the DO Relay module.
Note
:
The Discrete Output Relay module operates only with discrete
devices having their own power source.
When a request is made to change the state of a DOR, the request is
immediately sent to the DOR module. There is no scan time associated
with a DOR. Under normal operating conditions, the DOR channel
registers the change within 12 milliseconds. If the DOR is in momentary
or toggle mode, DOR channels register the change within 48
milliseconds.
The DOR modules draw power for the active circuitry from the
backplane.
Note
:
On power up or reset, the DO Relay module’s LEDs enter
indeterminate state for a few seconds as the module self-
identifies. The LEDs may flash, stay on, or stay off for a few
seconds.
CONTROL
Vs
CONTROL
Vs
EXTERNALLY POWERED
DISCRETE DEVICE
+
-
-
+
SELF- POWERED
DISCRETE DEVICE
-
+
+
-
-
-
-
+
+
+
-
C
H
1
C
H
2
C
H
3
C
H
4
C
H
5
-
Y
DO
RELA
5 CHAN
DOC0509A
R
S
R
S
LATCHING RELAY
NOTE: S = SET
R = RESET
Figure 3-14. Discrete Output Relay Module Field Wiring
Caution
You can induce ground loops by tying commons from various modules
together.
