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Internal Wiring Small controller
230 VAC
1
2
3
1
2
3
L
N
POWER 230V
Power Input
Input 1 A Max
1
2
3
1
2
3
N
L
POWER 230V
NOTE:
The SHLD (terminal 44) on the BACnet™ MS/TP controller is a free-floating terminal and is not connected to
any signal common.
HONEYWELL UNITARY CONTROLLER - 230 VAC - INSTALLATION INSTRUCTIONS
4
5
6
7
8
9
10
11
12
4
5
6
7
8
9
1
11
12
NC1 NO1 IN1 NC2 NO2 IN2 NC3 NO3 IN3 NC4 NO4 IN4
DO RELAY
-28V
Isolated
+28V
+21V
Power
+5V
Supply
MS/TP 1
RS485 1
MS/TP
ON
ADDRESS
OFF
+
- SHLD
+
1 2 4 8 16 32 64
42
43
44
45
42
43
44
45
4
5
6
7
8
9
10
11
12
4
5
6
7
8
9
1
11
12
NC1 NO1 IN1 NC2 NO2 IN2 NC3 NO3 IN3 NC4 NO4 IN4
DO RELAY
-28V
-28V
+28V
Isolated
+21V
+5V
Power
+28V
Supply
MS/TP 1
RS485 1
MS/TP
ON
ADDRESS
OFF
+
- SHLD
+
1 2 4 8 16 32 64
42
43
44
45
45
42
43
44
Power Auxiliary
Fig. 15 Internal Wiring Small controller
13
14
15
18
19
2
13
14
15
18
19
2
CO1
C
CO2
DO CHP
POW24
SYLK
UIO
-
COM
V0
IO1
C
IO2 IO3
WM1 / 2
46
47
48
49
50
51
52
53
54
46
47
48
49
50
51
52
53
54
13
14
15
18
19
2
18
19
2
13
14
15
CO1
C
CO2
DO CHP
Chopper
circuit
LDO 24V
POW24
SYLK
UIO
-
V0
COM
WM1 / 2
IO1
C
IO2 IO3
46
47
48
49
50
51
52
53
54
46
47
48
49
50
51
52
53
54
75 mA
1.8 W
17
21
22
23
21 22 23
CO3
C
CO4
C
IO4 IO5
C
IO6 IO7
C
IO8 C
55
56
57
58
59
60
61
62
63
64
55
56
57
58
59
60
61
62
63
64
Voltage Auxiliary
Max 75 mA across all
auxiliary power outputs
1.8 W
21
22
23
21 22 23
CO3
C
CO4
IO8 C
C
IO4 IO5
C
IO6 IO7
C
55
56
57
58
59
60
61
62
63
64
55
56
57
58
59
60
61
62
63
64
Voltage Auxiliary
65
65
65
65
75 mA
1.8 W
31-00610-01
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