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Honeywell
• 21
HVAC A
PPLICATION
3.2
Example of control connections
Table 10. Connection example, basic I/O board
Basic I/O board
Terminal
Signal
Default
1
+10 Vref
Reference output
2
AI1+
Analog input,
voltage or current
*
*
Selectable with DIP switches, see Installation Manual
Voltage
3
AI1-
Analog input common (cur-
rent)
4
AI2+
Analog input,
voltage or current
Current
5
AI2-
Analog input common (cur-
rent)
6
24Vout
24V aux. voltage
7
GND
I/O ground
8
DI1
Digital input 1
Start FWD
9
DI2
Digital input 2
Start REV
10
DI3
Digital input 3
Fault
11
CM
Common A for DIN1-DIN6
**
**
Digital inputs can be disconnected from ground. See
Installation Manual.
12
24Vout
24V aux. voltage
13
GND
I/O ground
14
DI4
Digital input 4
Preset
freq select
1
15
DI5
Digital input 5
Preset
freq select
2
16
DI6
Digital input 6
Fault reset
17
CM
Common A for DIN1-DIN6**
18
AO1+
Analog signal (+output)
OP freq
19
AO-/GND
Analog output common
30
+24 Vin
24V auxiliary input voltage
A
RS485
Differential receiver/transmit-
ter
B
RS485
Differential receiver/transmit-
ter
Reference potentiometer
1...10 k
Ω
Remote reference
4...20mA/0...10V
(programmable)
mA
To Relay board
1 or 2
Remote control
ground
Содержание SmartVFD HVAC MR4
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