Wiring The Discrete Input; Discrete Output - Emerson FloBoss 103 Instruction Manual

FloBoss 103/104 Instruction Manual

4.5.1 Wiring the Discrete Input

Caution
Discrete device

4.6 Discrete Output

4-6
: The selectable analog inputs/discrete input channels should have
Note
the 250-ohm resistor disabled when configured for use as
discrete inputs.
Figure 4-6 shows the terminals for connecting the DI wiring. The "+"
terminal is the positive signal input and the "–" terminal is the signal
common. The Discrete Input operates by providing a closed contact
across terminals "+" and "-". Refer to Figure 4-6.
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.
+
-
Figure 4-6. Discrete Input Wiring
The Discrete Output (DO) provides a solid-state switch to control relays
and to power small electrical loads. The DO circuitry is optically
coupled to help isolate the processor board from the input signal.
DO functions include:
▪ Sustained discrete outputs.
▪ Momentary discrete outputs.
▪ Slow pulse-train outputs.
The Discrete Output channel is a normally-open, FET switch. The
Discrete Output is a solid-state switch enabled by individual signals
from the processor I/O lines and capable of handling 50 V dc at 0.2 A
maximum.
The Discrete Output on the I/O termination board can be used in:
Input/Output
DI
V
s
+
-
Revised August-2017