Omega CN3440 User Manual

Page 13

ELECTRICAL INSTALLATION…

Table 4.1 Electrical Connections

Terminal Number

1
2

3 N/O
4 C
5 N/C

6 N/O
7 C
8 N/C

9 N/O
10 C
11 N/C

12
13
14

15
16
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
31
32

3rd lead/2-wire TX
Input 1+
Input 1–

3rd lead
Input 2+
Input 2–

Retransmission Output/Cool Output – see Fig. 4.15

Process Variable Input or 2-wire Tx Power Supply
– see Figs. 4.7 to 4.9, – see Fig. 4.13
4.12 and 4.14

Remote Set Point Input – see Figs. 4.7 to 4.12 and 4.14

Relay 1 Output Motorized Valve Control Relay (open)
– see Fig. 4.17 – see Fig. 4.19A

Relay 2 Output Motorized Valve Control Relay (close)
– see Fig. 4.17 – see Fig. 4.19A

Relay 3 Output
– see Fig. 4.17

AC Supply
L
N

– see Fig. 4.22

Alarm Relays

Position Feedback Input – see Figs. 4.18 , 4.19A and 4.19B

Logic Input 1 – see Figs. 4.20 and 4.21
Logic Input 2 – see Figs. 4.20 and 4.21
Common

RS 485 Modbus Serial Communications Option 1 only – see
Modbus (RTU) Communications Supplement

Current Proportioning Control Output/Heat Output Fig. 4.15
or 12V Logic Control Output Fig. 4.16

24V, 115V or 230V a.c.