Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 91
Configuration Note
Verify that each set of relay contacts meets the power requirements of the circuit with which it is being
used. Interposing relays are required when the interfaced circuit demands relay contacts with a higher
power rating. If interposing relays or other inductive loads are required, it is recommended that
interposing relays with surge (inductive kickback) protection be used. Improper connection could cause
serious equipment damage.
Configuration 2
Configuration 2 consist of two 24/12 Discrete FTMs (DIN rail mounted) connected to the MicroNet
Discrete I/O Smart-Plus module via two High Density Analog/Discrete cables. See Figure 8-7 for an
example of configuration.
Figure 8-7. Configuration 2, Two 24/12 Discrete FTMs
Both the 48 discrete inputs and 24 discrete outputs are wired to the 24/12 Discrete FTM. An external 24
Vdc source connection to the FTM is required for discrete input contact sensing and relay coil energizing.
For wiring information on the 24/12 Discrete FTM, see Chapter 13.
Discrete Inputs
Each 24/12 Discrete FTM accepts 24 contact inputs. The 24/12 Discrete FTM may supply contact wetting
voltage. Optionally, an external 18–32 Vdc power source can be used to source the circuit wetting
voltage. If the 24 Vdc internal power source is used for contact wetting, a jumper is required between
FTM terminals on TB9. If an external power source is used for contact wetting, the external source’s
common must be connected to the FTM’s discrete input common, terminal 49 (see Figure 8-8).
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