HONEYWELL UNITARY INSTALLATION INSTRUCTIONS-24 VAC/VDC
21 31-00614-01
Auxiliary Wiring Examples
Fig. 18 Auxiliary Wiring Examples
NOTE:
The auxiliary power output (terminals 48, 49) is supplied from the controller input power supply (terminals 3, 2
respectively). The polarity of the external devices must be checked with the controller input power supply. If the
polarity is reversed, external devices may be damaged.
DO Relay Wiring Examples
Fig. 19 DO Relay Wiring Examples
48
49
1 x 24 VAC/VDC at 300 mA
1 x 24 VAC/VDC at 75 mA
3 x 24 VAC/VDC at 75 mA
48
49
52
53
IO1
C
50
51
2
WM1
RS485
1
+
-
WM1 / 2
IO1 C IO2 IO3 C IO4 IO5 C IO6 IO7 C IO8
C IO9 C IO11 C IO12
COM
RS485 1 SYLK UIO
24VDC
OUT
24VDC
OUT
IO1
POWER 24V
NC1 NO1 IN1 NC2 NO2 IN2
NC3 NO3 IN3 NC4 NO4 IN4
DO RELAY
644645 47 48 49 50 51 52 53 55 56 57 58 59 61 62 63 65 66 67 68 69 71 7254 6 7
4321 56789 11121314151
24VDC
OUT
UIO
IO13 C IO14IO15 C IO16
32 33 34 35 36 37 38
V
PORT1 PORT2
10/100 SWITCHED
DO SSR
AUX
OUT
SRIN SR3 SR4CSR1 SR2C
16 17 18 19 21 22 232
644645 47 48 49 50 51 52 53 55 56 57 58 59 61 62 63 65 66 67 68 69 71 7254 6 7
4321 56789 11121314151 32 33 34 35 36 37 38
16 17 18 19 21 22 232
Ensure
Correct
Polarity
Auxiliary Power Output
V
POW24
V
V
Earth
Ground
External
Valve
AC or DC Motor
Resistive Heater
NC
NO
+
-
V
IN
4
5
6
NC
NO
IN
DO Relay
7
8
9
NC
NO
IN
10
11
12
NC
NO
IN
13
14
15
NC
NO
IN
RS485
1
+
-
WM1 / 2
IO1 C IO2 IO3 C IO4 IO5 C IO6 IO7 C IO8
C IO9 C IO11 C IO12
COM
RS485 1 SYLK UIO
24VDC
OUT
24VDC
OUT
IO1
POWER 24V
NC1NO1 IN1 NC2 NO2 IN2
NC3NO3 IN3 NC4 NO4 IN4
DO RELAY
644645 47 48 49 50 51 52 53 55 56 57 58 59 61 62 63 65 66 67 68 69 71 7254 6 7
4321 56789 11121314151
24VDC
OUT
UIO
IO13 C IO14IO15 C IO16
32 33 34 35 36 37 38
V
PORT1 PORT2
10/100 SWITCHED
DO SSR
AUX
OUT
SRIN SR3 SR4CSR1 SR2C
16 17 18 19 21 22 232
644645 47 48 49 50 51 52 53 55 56 57 58 59 61 62 63 65 66 67 68 69 71 7254 6 7
4321 56789 11121314151 32 33 34 35 36 37 38
16 17 18 19 21 22 232
Field
Devices
Jumper Bar
M
3 Speed Fan
L
N
External
Power
Supply
DO Relay wiring examples
M
AC or DC
External
Power Supply
NC
NO
+
-
V
IN
Electrical
Resistive
Heater
External
Power
Supply
V
POW24
Fuse
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