Chapter 5 – Standard Application Macro Programs
5-10
ACH 500 Programming Manual
HVAC-PI External
Connections
Process Control = Auto
Direct Speed Control = Manual
Connection Example
Figure 5-6
Connection Example
RUN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
REF
GND 2
AI 1+
AI 1-
AI 2+
AI 2-
SPL
GND 2
N.C.
SPL
DI 1
DI 2
DI 3
DI 4
DI 5
DI 6
AO 1+
AO 1-
AO 2+
AO 2-
RO 11
RO 12
RO 13
RO 21
RO 22
RO 23
RO 31
RO 32
RO 33
Function
Reference v 10 VDC 10 mA
Actual 1
Hand Reference* and
Auxiliary voltage 24 V DC @ 200mA
+24 V max. 10 mA
START HAND
AUTO SELECT
PRESET SPEED SELECT**
RUN ENABLE
START AUTO
Output Frequency
Output Current
READY
FAULT
A
f
Ready
Run
* Select voltage or current reference with plugs
Fault
120V AC
S1 and S2 on the customer interface board (beside
the screw terminals 1-6 of X50.
** Operation:
D15
D16
Output
0
1
0
1
0
0
1
1
set freq. through AI1
Preset Speed 1
Preset Speed 2
Preset Speed 3
0 = Open
1 = Closed
PRESET SPEED SELECT**
Terminal X50
1
2
3
4
5
6
+8V
Power to remote panel
RS-485 Serial Link Connections
GND2
Shield1
GND3
SGNA
SGNB
7
Shield2
Hand
Reference
Auto
Feedback
Terminal X51
Hand
Off
Auto
Auto Setpoint
