Wiring The Analog Output (4-Point I/O Board); Discrete Input; Ma Analog Output Current Control; Volts Analog Output Voltage Control - Emerson FloBoss 103 Instruction Manual

4.4.2 Wiring the Analog Output (4-point I/O Board)

External power
Externally powered
device

4.5 Discrete Input

Revised August-2017
Figure 4-4 shows the analog output wired as a current source, where
AO+ Positive
IC Current control
AO- Common
4-20mA current device
+
+
–
Figure 4-4. 4–20 mA Analog Output Current Control
Figure 4-5 shows the analog output wired as a voltage source:
Voltage Signal In
+
Common
–
Figure 4-5. 1–5 Volts Analog Output Voltage Control
The Discrete Input (DI) monitors the status of relays, solid-state
switches, or open collector devices. DI functions support discrete
latched inputs and discrete status inputs.
When a field device, such as a relay contact or open collector, is
connected across "+" and "–," the closing of the contacts completes the
circuit which causes a flow of current between Vs and ground at
terminal "–." This current flow activates and is sensed in the DI
circuitry that, in turn, signals the FB100 electronics indicating that the
relay contacts have closed. When the contacts open, current flow is
interrupted and the DI circuit signals to the FB100 electronics that the
relay contacts have opened.
You configure the selectable Pulse Inputs/Discrete Inputs as pulse
inputs using ROCLINK 800 software. Refer to Section 4.1.1.
FloBoss 103/104 Instruction Manual
AO
1-5V output
+
–
IC
-
AO
1-5V output
+
IC
-
Input/Output
Control
Control
4-5