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4/07 UDC2500 Universal Digital Controller Product Manual 27
A
larm
Relay#1
Out Relay#1
L1
L2/N
4
5
7
8
9
N.O.
N.C.
N.O.
Cool Relay Load
Load
Supply
Power
Time Duplex with a Dual Relay Board
1
1
Dual Electromechanical relays are rated at 2 Amps @120 Vac or 240 Vac or 30 Vdc. Customer should size
fuses accordingly. Use Fast Blo fuses only.
N.O.
19
20
21
22
23
24
25
26
27
To terminal
4 or 6
A
larm
Relay#2
N.C.
N.O.
6
Relay Load
To terminal
7 or 9
Relay Load
2
2
Load
Supply
Power
Load
Supply
Power
Heat Relay Load
Out Rela
y
#2
2
Electromechanical relays are rated at 5 Amps @ 120 Vac or 240 Vac or 30 Vdc.
Customer should size fuses accordingly. Use Fast Blo fuses only.
Figure 2-11 Dual Electromechanical Relay Option Output
See Table 2-6 for relay terminal connections for other Output Algorithm Types.
A
larm
Relay#1
L1
L2/N
4
5
7
8
9
N.C.
N.O.
2
When the instrument has the Current Output as shown, no Alarms are available when using the Time Proportional Duplex or
Three Position Step Control Output Algorithms, as these outputs require both available relays.
Electromechanical relays are rated at 5 Amps @ 120 Vac or 240 Vac or 30 Vdc.
Customer should size fuses accordingly. Use Fast Blo fuses only.
19
20
21
22
23
24
25
26
27
6
To terminal
7 or 9
Relay Load
2
Load
Supply
Power
+
Controller Load
0-1000 ohms
–
Current Output
4–20 mA
1
1
To terminal
4 or 6
A
larm
Relay#2
N.C.
N.O.
Relay Load
2
Load
Supply
Power
Figure 2-12 Current Output
See Table 2-6 for relay terminal connections for other Output Algorithm Types.