Honeywell NXL user manual Cabling and connections 4596, Control I/O

     Cabling and connections 45(96)

6.2.4Control I/O

Reference

Potentiometer 1-10 kΩ

mA

		Terminal			Signal	Description
1			+10Vref	Reference output		Voltage for potentiometer, etc.
2			AI1+	Analogue input, voltage range		Voltage input frequency reference
				0—10V DC.
3			AI1-	I/O Ground		Ground for reference and controls
4			AI2+	Analogue input, current range		Current input frequency reference
5			AI2-	0—20mA
			/GND
6			+24V	Control voltage output		Voltage for switches, etc. max 0.1 A
7			GND	I/O ground		Ground for reference and controls
8			DIN1	Start forward (programmable)		Contact closed = start forward
9			DIN2	Start reverse (programmable)		Contact closed = start reverse
10			DIN3	Preset speed selection 1		Contact closed = Preset speed 1
				(programmable)
11			GND	I/O ground		Ground for reference and controls
18			AO1+	Output frequency		Programmable
19			AO1-	Analogue output		Range 0—20 mA/RL, max. 500Ω
	A		RS 485	Serial bus		Differential receiver/transmitter
	B		RS 485	Serial bus		Differential receiver/transmitter
30			+24V	24V aux. input voltage		Control power supply backup
21			RO1		Relay output 1	Programmable
22			RO1		FAULT
	23		RO1

Table 6-7. Default I/O configuration.

	Terminal		Signal	Description
12		+24V	+24 V DC	Control voltage output; voltage for
				switches etc.
13		GND	I/O ground	Ground for reference and controls
14		Exp DIN1	Preset speed selection 2	Contact closed = Preset speed 2
			(programmable)
15		Exp DIN2	Fault Reset	Contact closed = Fault reset
			(programmable)
16		Exp DIN3	Disable PID (PID control	Contact closed = Disable PID
			selection)
			(Programmable)
25		Exp RO1	Expander Relay output 1 (NO)	Programmable
26		Exp RO1	RUN
28		TI+	Motor Thermistor input	Active = Fault, stop according to defined
29		TI-		method

Table 6-8. Additional inputs in NXL HVAC (available as option for NXL Compact)

	Terminal		Signal	Description
1		+10Vref	Reference output	Voltage for potentiometer, etc.
2		AI1+	Analogue input, voltage range	Voltage input frequency reference (MF2-3)
		or	0—10V DC	Voltage/current input frequency reference
		DIN 4		(MF4-MF6)
				Can be programmed as DIN4
3		AI1-	I/O Ground	Ground for reference and controls
4		AI2+	Analogue input, voltage range	Voltage or current input frequency

5AI2- 0—10V DC or current range reference

/GND 0—20mA

6+ 24 V Control voltage output

7 GND I/O ground Ground for reference and controls

Table 6-9. AI1 configuration, when programmed as DIN4

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