Omega CN3440 SERIES User Manual page 13

Universal temperature & process controllers
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Terminal Number
AC Supply
1
L
24V, 115V or 230V a.c.
2
N
3
N/O
4
C
5
N/C
6
N/O
7
C
8
N/C
9
N/O
10
C
11
N/C
3rd lead/2-wire TX
12
Input 1+
13
Input 1–
14
3rd lead
15
Input 2+
16
Input 2–
17
18
Tx+
19
Tx–
20
Common
21
Rx+
22
Rx–
23
+
24
25
+
26
27
3rd lead
28
Input 3+
29
Input 3–
30
Logic Input 1 – see Figs. 4.20 and 4.21
31
Logic Input 2 – see Figs. 4.20 and 4.21
32
Common
Relay 1 Output
– see Fig. 4.17
Relay 2 Output
– see Fig. 4.17
Relay 3 Output
– see Fig. 4.17
Process Variable Input
– see Figs. 4.7 to 4.9,
4.12 and 4.14
Remote Set Point Input – see Figs. 4.7 to 4.12 and 4.14
RS 485 Modbus Serial Communications Option 1 only – see
Modbus (RTU) Communications Supplement
Retransmission Output/Cool Output – see Fig. 4.15
Current Proportioning Control Output/Heat Output Fig. 4.15
or 12V Logic Control Output Fig. 4.16
Position Feedback Input – see Figs. 4.18 , 4.19A and 4.19B
Table 4.1 Electrical Connections
4 ELECTRICAL INSTALLATION...
– see Fig. 4.22
Motorized Valve Control Relay (open)
– see Fig. 4.19A
Motorized Valve Control Relay (close)
– see Fig. 4.19A
Alarm Relays
or
2-wire Tx Power Supply
– see Fig. 4.13
11

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