30
Elevator Restriction System Installation and Operation Manual
Installing the Elevator Restriction Unit
2.9
Power and Ground on TX3-ER-8 and TX3-ER-8-A
TX3-ER-8 and TX3-ER-8-A use the PS-4P power supply, which is a 16 VAC/
40 VA, CSA approved Class 2 Power Transformer, plug-in.
Attention: Connect all relay boards and elevator controller wires to the
ERU before connecting the power.
Connect the included 16 AWG wire to the earth ground.
Figure 15. Earth Ground
Connect the power to the 16VAC IN terminal, and then turn on the power.
Figure 16. Power
Earth Ground
(16 AWG)
16 VAC
IN
PS-4P Transformer
(located in electrical room)
18 AWG
TX3-ER-8(-A)
