Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 97
Table 8-4. Module Specification
Number of Channels: 48
Input Type: Optically isolated discrete input
Input Thresholds: < 8 Vdc = "OFF"
> 16 Vdc = "ON"
Input Current: 3 mA @ 24 Vdc
Contact Power: Module provides isolated 24 Vdc, 0.3 A
8.4.2—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 48Ch DI Module is connected through two low density discrete cables to two 24 Vdc Discrete
Input/Output FTMs or Discrete Input (With LEDs) FTMs. All I/Os on the module are accessible on the
FTMs, and the channels are labeled sequentially to correspond to their software locations (for example,
discrete input 1 on the FTM will be discrete input 1 in the application software). The FTM plugged into J1
handles channels 1–24, and the FTM plugged into J2 handles channels 25–48. See Figure 8-22 for
system installation configuration.
Power Supply
#1
Power Supply
#2
CPU
48
DI
Low Density Cable
Low Density Cable
24VDC Discrete Input/Output FTM
or
Discrete Input (With LEDS) FTM
J1
P2
J1
P2
J1
P1
J2
P1
24VDC Discrete Input/Output FTM
or
Discrete Input (With LEDS) FTM
Figure 8-12. 48Ch DI Module with two FTMs
Each 48Ch DI Module accepts 48 contact inputs. Contact wetting voltage may be supplied by the 48Ch
DI Module internal power supply. The supply can only supply 300 mA and therefore should not be used
with the Discrete Input (with LEDs) FTM. If an external power source (18–32 Vdc) is supplied, the
Discrete Input (with LEDs) FTM may be used. Figures 8-23 and 8-24 illustrate different discrete input
wiring configurations based on internal or external power source.
To Next Page
Loading...
