Omega Vehicle Security PTC900 manual AC Power DC Power, Sinking Logic, Sourcing Logic

4.1 POWER WIRING

AC Power	DC Power
Terminal 1: VAC	Terminal 1: +VDC
Terminal 2: VAC	Terminal 2: -VDC

4.2 TIMER INPUT WIRING

Before connecting the wires, the Timer Input logic jumper should be verified for proper position.

Two Wire Proximity, Current Source Current Sinking Output Current Sourcing Output

Switch or Isolated Transistor; Current Sink Switch or Isolated Transistor; Current Source

Interfacing With TTL Emitter Follower; Current Source

CAUTION: Timer Input common is NOT isolated from User Input common. In order to preserve the safety of the meter application, the timer input common must be suitably isolated from hazardous live earth referenced voltage; or input common must be at protective earth ground potential. If not, hazardous voltage may be present at the User Inputs and User Input Common terminals. Appropriate considerations must then be given to the potential of the User Input Common with respect to earth ground; and the common of the isolated plug-in cards with respect to input common.

4.3 USER INPUT WIRING

Before connecting the wires, the Timer Input logic jumper should be verified for proper position. When the user input is configured for cycle count, in module 4, the count input should be wired between terminals 7 & 10.

Sinking Logic

Terminals 7-9 Connect external switching device between the
Terminal 10	}appropriate User Input terminal and User Comm.

The user inputs of the meter are internally pulled up to +12 V with 22 KΩ resistance. The input is active when it is pulled low (<0 .9 V).

Sourcing Logic

Terminals 7-9:

+VDC through external switching device

Terminal 10:

-VDC through external switching device

The user inputs of the meter are internally pulled down to 0 V with 22 KΩ resistance. The input is active when a voltage greater than 3.6 VDC is applied.

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