GENISYS II System Hardware Installation UNION SWITCH & SIGNAL
SM-6900B Rev. 0.0 August 1999 2-21
2.4.3 Non-vital 32-Bit Output PCBs
The 32-bit output PCB (N17062701) provides 32 isolated, current-sourcing outputs which supply
0.50 AMP to an external load with a supply voltage of 8.0 to 35.0 volts DC. Outputs are fully
isolated from GENISYS II internal circuitry and the GENISYS II input power when a separate
output power supply is provided. Outputs are grouped in three isolated output groups. Each
output group can be connected to the same output power supply or to different output power
supplies. Outputs supply positive energy to the external load at supply voltage less 2.5 volts or
more. All 32 outputs are polyswitch-protected. Figure 2-10 shows a basic interface-wiring
diagram for this board.
2.4.4 Local Control Panel Driver / External Input PCBs
The local control panel driver / external input PCB (N17002801) provides 16 isolated, external
inputs and 16 internal inputs and 16 internal outputs used to drive an internal local control panel.
The inputs and outputs used for the local control panel connect directly to the connector on the
back of the local control panel section. The 16 external inputs each have separate (+) and (-)
connections. External inputs are considered asserted when the applied voltage is 8.0 to 35.0 volts
DC. Inputs are not asserted when the input voltage is less than 5 volts DC. Figure 2-11 shows a
basic interface wiring diagram for this board.
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