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Load
Supply
Power
3
Load
Supply
Power
3
Dummy Resistor
Load
Supply
Power
2
Load
Supply
Power
3
If the load current is less than the minimum rated value of 20 mA, then there may be residual voltage across both
1
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 the load must exceed 20 mA. Solid State Relays are zero-crossing type.
Solid State relays are rated at 1 Amp at 25°C and derated linearly to 0.5 Amp at 55°C. Customer should size
2
fuse accordingly. Use Fast Blo fuses only.
Electromechanical relays are rated at 5 Amps @ 120 Vac or 240 Vac or 30 Vdc.
3
Customer should size fuses accordingly. Use Fast Blo fuses only.
04/08
Relay Load
To terminal
4 or 6
Relay Load
To terminal
7 or 9
Relay Load
Relay Load
To terminal
7 or 9
Figure 2-9 Solid State Relay Output
UDC3200 Universal Digital Controller Operator Manual
Time Simplex
19
Output
20
L1
Relay#1
N.O.
21
L2/N
22
4
N.C.
Alarm
Relay#2
23
5
N.O.
6
24
25
7
N.C.
Alarm
Relay#1
26
8
N.O.
9
27
Time Duplex
19
Output
20
L1
Relay#1
N.O.
21
L2/N
22
4
Output
Relay#2
23
5
N.O.
6
24
25
7
N.C.
Alarm
Relay#1
26
8
N.O.
9
27
Dummy Resistor
Load
Relay Load
Supply
Power
2
Dummy Resistor
Load
Relay Load
Supply
Power
2
17
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