OC-004B1 Four Channel Optical Coupler
CH1+ D3 D3
10ma CH2+ D1 G
CH3+ D2 D4 Crossover
CH3- D2 Phone Cord
Isolated Switch Closure Input Ch4- D4
To Timer RSSR input
When Switch is Closed, input
is active. When Open, input is
Note: Channel 1 = IN1
Channel 2 = IN2
Channel 3 = IN3
Channel 4 = IN4
See Timer documentation for assigned functions.
Non-Isolated Switch Closure Inputs
The OC-004 optical coupler may be used with any Timer that has remote ground closure (RSSR) inputs.
The input channels are isolated from each other and require their own power input. Or the negative
inputs can be tied together so a common supply can be used, if isolation is not required.
This unit is normally powered by the timer it is connected to. However, if extra power is needed, a 12V AC/DC power supply
can be connected directly to this unit. This extra supply should remain isolated from the inputs to protect the equipment.
Alzatex, Inc. www.alzatex.com oc004_wiring1.pdf