Emerson FloBoss 107, Инструкция по эксплуатации

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FloBoss 107 Instruction Manual
Revised June-2017 Inputs and Outputs 4-15
Note: Select DI as the I/O Type for the selectable pulse inputs/discrete
inputs when you configure it for use as a discrete input. Refer to
Figure 4-5 .
4.9.1 Wiring the Discrete Inputs
The terminals provided on the CPU module for connecting the DI wiring
are shown in
Figure 4-12 .
The + terminal is the positive signal input and the GND terminal is the
signal common (

). The discrete input operates by providing a closed
contact across ter and GND. Refer to Figure 4-12 .
Caution
You can induce ground loops by tying commons from various modules
together.
The discrete input is designed to operate only with non-powered
discrete devices, such as “dry” relay contacts, open collector devices,
or isolated solid state switches. Use of the DI channel with powered
devices may cause improper operation or damage.
OR
OPEN DRAIN TYPE
OR
OPEN COLLECTOR DEVICE
EXTERNALLY POWERED
+
-
CONTACT-CLOSURE DEVICE
EXTERNALLY POWERED
+
-
Figure 4-12. Discrete Input Wiring (on CPU Module)
4.10 Discrete Outputs (DO)
The discrete output (DO) provides two-state outputs to energize solid-
state relays and power small electrical loads. You can set a discrete
output to send a pulse to a specified device. Discrete outputs are high and
low outputs used to turn equipment on and off.
The DO circuitry is optically coupled to help isolate the processor board
from the input signal. Refer to
Figures 4-13 and 4-14 .