Discrete Output (Do) Modules - Emerson ROC809 Instruction Manual

12KHz PI FILTER &
LEVEL DETECTION
125KHz PI FILTER &
LEVEL DETECTION
Figure 4-11. Externally Powered Pulse Input Module Field Wiring
Representative
Internal Circuit
12KHz PI FILTER &
LEVEL DETECTION
Figure 4-12. ROC800-Powered Pulse Input Module Field Wiring
Caution
4.7

Discrete Output (DO) Modules

Revised July-2017
Representative
Internal Circuit
PI
L
H
L
H
2 CHAN
You can induce ground loops by tying commons from various modules
together.
The five-channel Discrete Output (DO) module provides two-state
outputs to energize solid-state relays and power small electrical loads.
These are solid-state relays. A Discrete Output may be set to send a
pulse to a specified device. Discrete Outputs are high and low outputs
used to turn equipment on and off.
DO modules can be software-configured as latched, toggled,
momentary, or Timed Duration Outputs (TDO). The DO can be
ROC800-Series Instruction Manual
Field Wiring
OPEN DRAIN TYPE
+
OPEN COLLECTOR DEVICE
-
EXTERNALLY POWERED
+
CONTACT-CLOSURE DEVICE
- EXTERNALLY POWERED
DOC0510B
Field Wiring
+
OPEN COLLECTOR
-
OPEN DRAIN TYPE DEVICE
+T
ROC800 POWERED
DOC0511A
Input/Output Modules
OR
OR
- +
METER COIL
4-13