Control Terminal Signals - Honeywell NXL User Manual

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6.2.5 Control terminal signals

Terminal
+10 Vref
1
AI1+
2
AI1–
3
AI2+
4
AI2–
5
24 Vout
6
GND
7
DIN1
8
DIN2
9
DIN3
10
GND
11
AO1+
18
AO1–/GND
19
RS 485
A
RS 485
B
+24V
30
RO1/1
21
RO1/2
22
RO1/3
23
Table 6-9. Control I/O terminal signals
NOTE! NXL HVAC additional inputs terminal signals defined in section 11 NXLOPTAI
6
Cabling and connections
Signal
Reference voltage
Analogue input,
voltage
(MF4 and bigger: voltage or current)
Analogue input common
Analogue input, voltage or
current
Analogue input common
24V auxiliary output voltage
I/O ground
Digital input 1
Digital input 2
Digital input 3
I/O ground
Analogue signal (+output)
Analogue output common
Serial bus
Serial bus
24V auxiliary input voltage
Relay output 1
Technical information
Maximum current 10 mA
MF2-MF3: Voltage input
MF4-MF6 Selection V or mA with jumper block X8 (see
page 39):
Default: 0– +10V (Ri = 200 k Ω )
0– 20mA (Ri = 250 Ω )
Differential input if not connected to ground;
Allows ± 20V differential mode voltage to GND
Selection V or mA with jumper block X4(MF2-MF3) and
X13 (MF4-MF6)
Default: 0– 20mA (Ri = 250 Ω )
0– +10V (Ri = 200 k Ω )
Differential input;
Allows ± 20V differential mode voltage to GND
± 10%, maximum current 100 mA
Ground for reference and controls
R = min. 5k Ω
i
Ground for reference and controls
Output signal range:
Current 0(4)–20mA, R max 500 Ω or
L
Differential receiver/transmitter, bus impedance 120 Ω
Differential receiver/transmitter, bus impedance 120 Ω
Control power supply backup
Switching capacity:
Relay output terminals are galvanically isolated from the
I/O ground
Honeywell Honeywell
Honeywell Honeywell
24VDC/8A
250VAC/8A
125VDC/0,4A