Carrier PIC 5+ User Manual page 6

3.1.3 - IO Board
IO Board is Input/output Board, and it is supplied from a 24VAC supply referred to earth.
For the IOB input / output description, please refer to section 3.4.
3.1.4 - LEN -> MODBUS Protocol Converter
RS-232
RS-485
LEN -> MODBUS Protocol converter is connected between IOBs and VFD. Please refer the decription in the above picture.
6
+
PIC5 Port
-
GND
+
-
Unused
VFD Port
Unused
GND
2 Wire
4 Wire
LED1
SEND
LED2
RECEIVE
LED6
SEND
LED7
RECEIVE
24V AC
GND
24V
LED3
POWER
8
7
6
5
4
LED4
RUNNING
3
2
1
LED5
ON
ERROR
OFF