Generac Nexus Controller Advanced (V3)
This topic is the install guide for the 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 Nexus Controller.
Generac Nexus Controller Front Display
The GL899 does not have an RS232 port, and requires a RS232 to RS485 converter (DTech DT9000 included in A0009887771 accessories kit). An additional breakout board is required to jump Nexus controller comm wires to RS232 link side of converter.
Generac Link-Site Deployment Controller Selection:
Generac Nexus-RS485
Modbus Communication Settings and Notes
Settings should correspond to the values provided in this table.
Unit Address: 157 |
Baud Rate: 9600 |
Parity: None |
Stop Bits: 1 |
Equipment Connection Details
Generac Gateway Side Terminations | Description | Harness Wire Color | Equipment Side Terminations | RS232 DB9 breakout* | DTECH |
|---|---|---|---|---|---|
2 | DC+ | A0009887772 Red | B+ | ||
1 | DC- | A0009887772 Black | B- | ||
8 | Data + | A0009887770 Orange / White | 388 | 3-TXD | T/R+ |
9 | Data - | A0009887770 White / Orange | 387 | 2-RXD | T/R- |
10 | Data GND | A0009887770 Blue/ White | 389 (GND) | 5-GND | GND |
Harness Relay #1 | COM | A0009887772 Blue | 2-Wire Start | ||
N/O | A0009887772 White / Blue |
* DB9 breakout board needs to be procured separately by installer.
The DSE899 does not have an RS232 port, hence we need to use a DTECH DT-9000 RS232 to RS485 converter.
Gateway Connection Ports
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.