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12/03 DR4300 Circular Chart Recorder Product Manual
39
7
TB2
TB1
7
TB2
TB1
Main PCA
Pen 2
Main PCA
Pen 1
24823
TB3
Load
Supply
Power
Relay #1
Load
Relay #2
Load
Load
Supply
Power
TB4
321
321
To terminal
1 or 3
To terminal
1 or 3
OR
If the load current is less than the minimum rated value of 20 mA, there may be a residual voltage
across both ends of the load even if the relay is turned off. Use a dummy resistor as shown to
counteract this. The total current through the resistor and the load current must exceed 20 mA.
Solid State relays are rated at 0.5 Amps. Size fuses accordingly.
1
2
Power
Power
TB3
Relay #1
Load
Relay #2
Load
TB4
321
321
1
1
2
Load Supply
Load Supply
Electromechanical
Relay Output Wiring
Solid State Relay
Output Wiring
Figure 2-14 Relay Output Wiring