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Wiring Diagrams
PLC/SCADA
(master)
A
B
GND
0V
PLC/SCADA
(master)
RECEIVE
TRANSMIT
RXA
RXB
GND
GND
TXA
0V
TXB
0V
Siemens Apogee P1 Communications Interface
1
B
Figure 3 2-Wire Wiring Diagram for the HVAC10 Size 2 & 3 Drive
TRANSMIT
1
TXB TXA
Figure 4 4-Wire Wiring Diagram for the HVAC10 Size 2 & 3 Drive
DRIVE
(slave)
OFF
ON
1
1
2
2
2
3
4
5
6
0V SCR
B
A
A
DRIVE
(slave)
OFF
ON
1
1
2
2
RECEIVE
2
3
4
5
6
0V SCR RXB RXA
DRIVE
(slave)
last inverter in chain
OFF
ON
1
1
2
2
2
3
1
4
5
0V SCR
B
B
A
DRIVE
(slave)
last inverter in chain
OFF
ON
1
1
2
2
TRANSMIT
RECEIVE
2
3
1
4
5
0V SCR RXB RXA
TXB TXA
5
6
A
6
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