Manual

WindO/I-NV2 User’s Manual 34-19

2 HG2G-5F, HG3G/4G

MICRO/I Specifications

2.4

External Interfaces

● Serial Interface (COM1)

CAUTION

• Make sure to turn off the power to the HG2G-5F, HG3G/4G before wiring each interface or

switching the terminating resistor selector Switch.

• Note that only one of the RS232C or RS485(422) interfaces can be used at one time. Wiring both

interfaces will result in failure of the HG2G-5F, HG3G/4G. Wire only the interface used.

Interface Specification RS232C/485(422)

Connector D-sub 9 pin (Plug)

Screw lock bracket Inch Screw Thread #4-40 UNC

No. Name I/O Function

Communication type

1 4W-RDA/2W-A IN/INOUT Receive Data (+) [4W]/ Send and Receive Data (+) [2W] RS485(422)

2 RD IN Receive Data RS232C

3 SD OUT Send Data RS232C

4 4W-SDA OUT Send Data (+) [4W] RS485(422)

5 SG - Signal Ground -

6 4W-RDB/2W-B IN/INOUT Receive Data (-) [4W]/ Send and Receive Data (-) [2W] RS485(422)

7 RS OUT Request to Send RS232C

8 CS IN Clear to Send RS232C

9 4W-SDB OUT Send Data (-) [4W] RS485(422)