Knowledge Base

Generac G Panel (Stand Alone) (V3)

This topic is the install guide for after-market Gateway (part# A0009887841) with the GL899-PARTIAL POWER HARNESS (part# A0009887769), GL899-PARTIAL COMM HARNESS (part# A0009887770) and the GL899-COMM ACCESSORIES( part# A0009887771) utilizing the Generac G Panel (stand alone single generator application).

GPanel.png
DTECH9000.png

The GL899 does not have an RS232 port, and requires a RS232 to RS485 converter (DTech DT9000 included in A0009887771 accessories kit). Connect the converter to G Panel service port.

Modbus Communication Settings and Notes

Settings should correspond to the values in the table provided.

Address:  100

Baud Rate: 9600

Mode: Modbus Slave

If different settings are required, please contact Support.

Equipment Connection Details

Generac Gateway Side Terminations
Description
Harness Wire Color
Equipment Side Terminations
DTECH
DT-9000 RS485 port

2

DC+

A0009887769 Red

TB1-1


1

DC-

A0009887769 Black

TB1-2

8

Data +

A0009887770 Orange / White


T/R+

9

Data -

A0009887770 White / Orange

T/R-

10

Data GND

A0009887770 Blue/ White

GND

Gateway Connection Ports

image-20251103-154231.png

Pin

Connector

Description

1

A

Plant Supply –ve

2

Plant Supply +ve

3

Digital Output A

4

Digital Output B

5

Flexible Sender Common

6

Flexible Sender A

7

Flexible Sender B

1

B

 

RS485 A

2

RS485 B

3

RS485 Screen

4

CAN H

5

CAN L

6

CAN Screen

Check out our knowledge base and support center for information on any technical questions.