HVAC400X – APPLICATION MANUAL
11
EN2B-0417GE51 R0719
Fig. 4. The control connection example for the relay board 1
* You can use the DIP switches to select these. See Installation Manual (which can be downloaded from
the e-catalog).
** You can electrically isolate the digital inputs from the ground using a DIP switch.
digital input 1
DI1
8
7
6
5
AI2-
AI2+
AI1-
AI1+
4
3
2
1
9
10
11
12
13
14
15
16
17
18
B
A
30
19
DI2
DI3
CM
24 V
out
24 V
out
+10 V
ref
Terminal
Description
Signal
voltage
current
GND
GND
DI4
DI5
DI6
CM
AO1+
+24 V
in
RS485
RS485
AO1+ / GND
digital input 2
digital input 3
24V auxiliary voltage
24V aux. input voltage
serial bus, negative
serial bus, positive
I/O ground
I/O ground
24V auxiliary voltage
digital input 5
digital input 6
common A for DI1...6 **
analog signal (+output)
reference output, 10V
Standard I/O board
analog output
common
analog input
common (output)
analog input
common (current)
analog input,
voltage, or current *
analog input,
voltage, or current *
digital input 4
common A for DI1...6 **
2-wire
transmitter
reference
potentiometer
1...10kOhm
external
reference
4-20mA / 2-10V
(programmable)
to relay board 1 or 2
mA
start FWD
start REV
fault
preset freq sel 1
preset freq sel 2
fault reset
output
frequency