Installation 
42  UDC3500 Universal Digital Controller Product Manual  3/07 
 
1 
Electromechanical relays are rated at 5 Amps @ 120 Vac or 240 Vac or 30 Vdc.  Size fuses 
accordingly.  Use only Fast-Blo fuze types.
 
To terminal 
16 (N.C.) or 18 (N.O.)
 Relay #5 Load
 
1 
Load 
 
Supply 
 
Power
 
28 
29 
30 
31 
32 
33 
34 
35 
36 
N.C.
N.O.
11 
12
 13
 14
 16
 17
 18
 15
10 
To terminal 
13 (N.C.) or 15 (N.O.)
 Relay #4 Load
 
1 
Load 
 
Supply 
 
Power
 
N.C.
N.O.
To terminal 
10 (N.C.) or 12 (N.O.)
 Relay #3 Load
 
1 
Load 
 
Supply 
 
Power
 
N.C.
N.O.
Relay #3
Relay #4
Relay #5
 
Figure 2-24 Optional Electromechanical Relay Outputs 
See Table 2-6 and Table 2-7 for other information about output types. 
 
 
Configure:
4S1TY = NONE
 
4S2TY = NONE
 
2 Wire Transmitter
 
 
+
 
Input 1
 
larm 4
 
250 
35 +
36 -
8 + 
9 - 
If necessary, install a zener diode here to reduce voltage at the 
transmitter.  A 1N4733 will reduce the voltage at the transmitter to 
approximately 25 Vdc.
 
1
 
1
 
 
Figure 2-25 Transmitter Power for 4-20 mA — 2 wire Transmitter Using Open 
Collector Output 
 
 
Configure: 
A4S1TY = DEV 
A4S1VAL = 9999 
A4S1HL = HIGH 
A4S2TY = NONE 
OUTALG = CURRENT