Omega CN3440 manual Terminal Number AC Supply

				4 ELECTRICAL INSTALLATION…
Terminal Number
	AC Supply
1	L	24V, 115V or 230V a.c.		– see Fig. 4.22
2	N
3	N/O		Relay 1 Output	Motorized Valve Control Relay (open)
4	C
			– see Fig. 4.17	– see Fig. 4.19A
5	N/C
6	N/O		Relay 2 Output	Motorized Valve Control Relay (close)
7	C
			– see Fig. 4.17	– see Fig. 4.19A
8	N/C
9	N/O		Relay 3 Output
10	C			Alarm Relays
			– see Fig. 4.17
11	N/C

123rd lead/2-wire TX

13Input 1+

14Input 1–

153rd lead

16Input 2+

17Input 2–

18Tx+

19Tx–

20Common

21Rx+

22Rx–

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

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

23+

24–

25+

26–

273rd lead

28Input 3+

29Input 3–

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

30Logic Input 1 – see Figs. 4.20 and 4.21

31Logic Input 2 – see Figs. 4.20 and 4.21

32Common

Table 4.1 Electrical Connections

11