Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 112
9.28.2—Installation
The modules slide into card guides in the control's chassis and plug into the motherboard. The modules
are held in place by two screws, one at the top and one at the bottom of the front panel. Also at the top
and bottom of the module are two handles which, when toggled (pushed outward), move the modules out
just far enough for the boards to disengage the motherboard connectors.
Each 24/8 Analog Module is connected through two High Density Analog/Discrete cables to two 24/8
Analog FTMs. All I/Os on the module are accessible on the FTM, and the channels are labeled to
correspond to their software locations (e.g., analog input 1 on the FTM will be analog input 1 in the
application software). See Figure 9-69 for an example.
Figure 9-7. Simplex System Configuration Example
Analog Inputs
For a 4–20 mA input signal, the 24/8 Analog Module uses a 200 ohm resistor across the input located on
the 24/8 Analog Module. Each analog input channel may power its own 4–20 mA transducer. See Figure
9-3 for analog input connection. This power is protected with a 100 mA fuse on each channel located at
the FTM to prevent an inadvertent short from damaging the module. The 24 Vdc outputs are capable of
providing 24 Vdc with ±10% regulation. Power connections can be made through terminals located on the
24/8 Analog FTMs. See Chapter 13 for complete field wiring information for the 24/8 Analog FTM.
Maximum loop power current is 0.32A per 12 inputs located on the
same FTM.
When configuring the AI Combo block in GAP, set Conf. input field to
0 for all inputs working in 1-5V voltage mode. This will disconnect
input 200ohms sense resistor and allow the block to use the module
factory voltage calibration values.
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