Omega CN3440 manual Logic Input Connections Figs .20, Programming Guide

4 ELECTRICAL INSTALLATION…

4.10Logic Input Connections – Figs. 4.20 and 4.21

Each logic input can be programmed to perform one of a number of functions – see Section

3.10of the Programming Guide.

			Auto/	Local/Remote				Dual Set Point		Alarm
			Manual		Set Point				Selection	Acknowledgement
			Selection		Selection					* Alarm
									Fixed Dual
										Acknowledge
			Automatic				Local		Set Point 2
	5V
Logic switching
	0V
			Manual			Remote			Fixed Dual	* Leading 'edge-triggered'
						or Dual			Set Point 1	(minimum duration 200ms)
30	31	32

Automatic	Local	Fixed Dual Set Point 2
Manual	Remote (Dual) Fixed Dual Set Point 1		Alarm Ack.

30	Logic Input 1	Note. Only one function may be
		performed by each input at any one time.
31	Logic Input 2

32Common

Fig. 4.20 Standard Logic Input Functions

				Hold	* Profile	* Skip
				(Soak)	Reset	Segment
		5V
		Logic switching
		0V			* Leading 'edge-triggered'
				Start
				Profile	(minimum duration 200ms)
	30	31	32
				P–Strt	P–rSEt	P–SKIP
				Hold/ (Soak)
				Start Profile	Profile Reset Skip Current Segment
30	Logic Input 1			Note. Only one function may be
31	Logic Input 2
				performed by each input at any one time.

32Common

Fig. 4.21 Additional Logic Input Functions for Profile Selection

15