Discrete Output Relay (Dor) Modules; Discrete Output Module Field Wiring - Emerson DL8000 Instruction Manual

Caution
Caution

3.2.10 Discrete Output Relay (DOR) Modules

Revised February-2016
The Discrete Output module only operates with non-powered discrete
devices, such as relay coils or solid-state switch inputs. Using the
module with powered devices may cause improper operation or
damage.
The DO modules draw power for the active circuitry from the
backplane. The DO module is current-limited for protection against
excessive current.
: When using a DO module to drive an inductive load (such as a
Note
relay coil), place a suppression diode across the input terminals
to the load. This protects the module from the reverse Electro-
Motive Force (EMF) spike generated when the inductive load is
switched off.
Representative
DO
Internal Circuit
1+
COM
+V
s
+
2+
-
COM
CONTROL
3 +
COM
4 +
COM
5 +
COM
5 CHAN
Figure 3-13. Discrete Output Module Field Wiring
You can induce ground loops by tying commons from various modules
together.
The five-channel DO Relay (DOR) module provides LEDs that light
when each output is active. DOR modules use dual-state latching relays
to provide a set of normally open, dry contacts capable of switching 2 A
at 32 Volts dc across the complete operating temperature. Using
ROCLINK 800, you can configure the module as latched, toggled,
momentary, or Timed Duration Outputs (TDO). You can configure the
DOR either to retain the last value on reset or to use a user-specified
fail-safe value.
DL8000 Preset Instruction Manual
Field Wiring
DISCRETE DEVICE
- EXTERNALLY POWERED
DOC0508A
Modules
+
-
3-15