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After-Market Kit Installation and Troubleshooting Guide (Version 3)

The latest Aftermarket Gateway kit (A0009887841) and one of the following harnesses

a) A0009887769 (GL899-PARTIAL POWER HARNESS; provides fuse protected DC power to gateway)

b) A0009887770 (GL899-PARTIAL COMM HARNESS; provides RS485 and CAN J1939 connections)

c) A0009887772 (GL899-PARTIAL RETROFIT HARNESS; provides fused power and GPIO connections)

Or A0009887771 (GL899-COMM ACCESSORIES)

These harnesses and accessories enable remote control and monitoring of backup power equipment leveraging Generac Link Manager, our cloud solution for industrial IoT connectivity. This topic offers wiring and hardware details as well as some troubleshooting steps for a complete setup that enables continuous communications and remote access.

Commissioning the Gateway

This topic details the hardware components and installation steps needed to commission an IoT-enabled generator and associated equipment.

Be sure to check out our FAQs for answers to common questions.

Tools Needed

Technicians should bring the following hardware and software to the installation.

 On Hand

 Hardware and Documentation

  •  

Access to Genlink software (specific to Generac controllers)

  •  

Modbus master simulator such as Modscan64

  •  

Windows Laptop

  •  

Equipment Install Guides

  •  

USB to serial connector

  •  

Mini flat head screw driver

Other checklist items for Site Deployment include verifying voltage and the condition of circuit fuses. Please follow the steps in this table.

 Pass/Fail

 Site Deployment Prerequisites

  •  
  1. At least one of the GPS or signal strength or LINK or RS485 LEDs should be on with solid color. Otherwise, check for any loose wires to 1 and 2 terminals.

  •  
  1. Measure the voltage across 1 and 2 (9–48 DC).

  •  
  1. If there is no voltage, check inline harness fuse for continuity.

  •  
  1. If no LED is on, the gateway may be faulty. Please refer to the gateway replacement section if necessary.

Installation Steps

The remaining steps needed for a complete installation are provided in this section, which details kit components.

  1. Identify components included in the kit as provided in the previous section.

In the event that any of these parts arrive damaged, please contact Support to open a ticket and request needed replacements.

  1. Identify existing din rail. Gateway should be mounted in interior of gen controller enclosure where possible to limit vibration and weather exposure.

  2. Connect included cell antennae to Main and Diversity ports on side of the gateway. Mount as close to outside of generator enclosure as possible. Antennae ends should be separated approximately 12”-18”. Installation of a drip loop is required to keep water from entering unit.

  3. Connect included GPS antenna to GPS port on side of gateway. Mount as close to outside of generator enclosure as possible. Installation of a drip loop is required to keep water from entering unit.

  4. Inspect wiring harness and make sure it meets the needs of the use case. Given below are few use cases for guidance. Once verified, identify customer and gateway ends on the harness. Note that there are four (4) distinct harness types available for connection.

DSE899 Connection Method

Harness needed

TCP connection with all monitoring and control capability available via Modbus

A0009887769

RS485 connection with all monitoring and control capability available via Modbus

A0009887769, A0009887770

TCP connection but needs either 1 or 2 inputs and/ or to drive 1 or 2 digital outputs

A0009887772

RS485 connection but needs either 1 or 2 inputs and/ or to drive 1 or 2 digital outputs

A0009887772, A0009887770

RS232 connection with all monitoring and control capability available via Modbus

A0009887769, A0009887770, A0009887771

RS232 connection but needs either 1 or 2 inputs and/ or to drive 1 or 2 digital outputs

A0009887772, A0009887770, A0009887771

Monitoring via CAN J1939 but needs either 1 or 2 inputs and/ or to drive 1 or 2 digital outputs

A0009887772, A0009887770

  1. Route customer end to be near generator termination points. See generator controller specific reference pages for recommended terminations.

  2. Make final connections on customer end per documentation.

image-20251107-163411.png

image-20251107-163434.png

  1. If included ethernet cable is being used for modbus communication to equipment, connect to the port labeled 1 on gateway.

  2. External device will need to be programmed with like IP address for communication to be established.

Default ETH1 Port Settings:

Recommended Equipment
IP Settings:

IP Address: 192.168.3.100
Subnet Mask: 255.255.255.0 

IP Address: 192.168.3.2  
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.3.100

If default or recommended settings can not be used contact Generac customer support (Option 4 <TBD>) or email at support@energyservices.generac.com

Wire Termination Setup Detail

The table below outlines each connection for the advanced aftermarket gateway and universal harness, detailing how they interface with the equipment to be monitored.

We recommend scheduling time with a Generac solutions engineer before attempting to connect multiple assets through one gateway. For example, if your site hosts multiple generators, ATSs, or fuel sensors, more advanced support may be required to communicate via one gateway.

Generac Gateway Side Termination 

Description 

Harness Wire Color 

Harness Model 

Customer Side Terminations 

1

DC- 

Red 

A0009887772, A0009887769

Battery(+)

2

DC+ 

Black 

A0009887772, A0009887769

Battery(-)

Harness Relay#1

COM

Blue

A0009887772

2-Wire Gen Start

NC

Blue/ White

A0009887772

NO

White/ Blue

A0009887772

Harness Relay#2

COM

Brown

A0009887772

Spare Output

NC

White/ Orange

A0009887772

NO

Green/ Yellow

A0009887772

Common

Black

A0009887772

N/A

6

Analog Input1 +

Purple

A0009887772

Analog Input1 + (0-10VDC)

7

Analog Input2 +

Green

A0009887772

Analog Input2 + (0-10VDC)

RS485 A 

Orange/White

A0009887770

RS485+

9

RS485 B

White/Orange

A0009887770

RS485- 

10 

RS485 Screen

Blue/White 

A0009887770

RS485 GND 

11

CAN H

Orange/White

A0009887770

CAN H

12

CAN L

White/Orange

A0009887770

CAN L

13

CAN Screen

Blue/White

A0009887770

CAN Screen

Troubleshooting

Check this section to resolve any issues experienced while setting up the Advanced Gateway.

Front Panel Indicators and Components

Front Panel Component

Description

GPS LED

Solid red when gateway device is powered on. Off when gateway device powered off

Cellular signal bar LEDs

Solid green depending on signal strength

LINK1 LED

Solid red when gateway device has not connected to internet provider or is in the process of connecting to internet provider

Solid green when gateway device has successfully connected to internet provider

LINK2 LED

Always off <Check with Bryan/ Drew>

RS485 LED

Blinking green when gateway device is trying to connect to Modbus slave device

Off when gateway device has not been configured to use RS485 communication

CAN LED

Blinking green when gateway device is configured to use CAN Bus and transmitting/ receiving on CAN network

1

Ethernet Connection via static IP

2

Ethernet Connection via DHCP

GPS antenna Terminal

GPS antenna connection

Main antenna Terminal

GSM cellular antenna connection

Diversity antenna Terminal

GSM cellular antenna connection

Verifying Proper SIM Installation

  1. Power off the gateway.

  2. To open the SIM card slot, check the image below and follow the procedure given here

    1. #1 - Insert a flat head screw driver and push the notch back

    2. #2 - At this time pull the top cover

    3. #3 - Next push the notch with flat head screw driver

    4. #4 - Pull up the cover

    5. #5 - Pull up the other end of cover

image-20251107-202605.png
  1. Verify that the SIM card on arrival is inserted in the slot, as depicted in the photo, with chip wiring facing down.

image-20251107-205450.png

  1. To replace the SIM or insert a new one, push the SIM cover back with thumb away from antenna terminals. Then insert the SIM in the slot, close the cover and push the cover back towards antenna terminals.

    image-20251111-182430.png

Using a LAN-Based Internet Connection

For LAN wired internet connectivity, ports 443, 5671, and 8883 must be opened for outbound traffic on the facility firewall, if applicable. The customer-provided Ethernet connection must be configured to assign the Generac Link gateway an IP address via DHCP.

  1. Run network cable from customer’s nearest network infrastructure to a laptop.

  2. Verify that the network cable has an active internet connection by opening a web browser and attempting to access http://www.google.com .

  3. If laptop test is successful, connect Ethernet cable to ETH2 port on the gateway. If test is not successful work with facility IT to resolve.

  4. Power off the gateway.

  5. Remove SIM card(s) from the gateway.

  6. Power on the gateway.

  7. Wait 10–15 minutes then check the Generac Link Manager for live data streaming. If it is not communicating, please reach out to Support.

A computer based call using Microsoft Teams may be needed to share your screen with on of our solutions engineers.

Changing Communication Option from Serial to Ethernet

  1. Enable the Modbus TCP port on the asset controller.

  2. Set the controller IP address in 192.168.3.x (any value, with the exception of 192.168.3.100).

  3. Set subnet mask to 255.255.255.0.

  4. Run ethernet cable and connect to asset controller Modbus TCP port as well as ETH1 port on Generac Link gateway.

  5. Contact Support to reconfigure site for Modbus TCP communications.

  • If controller IP address cannot be changed due to site restrictions, please reach out to a Solutions Engineer.

  • If the technician does not have password to change communication setup on controller, reach out to the IDC master tech or to the generator support team.

  • If the technician does not know where to change the communication setup, reach out to the IDC master tech or generator support team.

Data Values of N/A

A connectivity issue may exist between the gateway and the network.

msng-values.png

Possible Connectivity Issue

Steps to resolve

  1. Confirm that the device is on by checking at least one of GPS or Link1 or Link2 lights are on.

    DSE899_LEDs.JPG
  2. If all lights are Off, check voltage at 1 and 2 terminals.

  3. To verify the gateway's cellular connection, check the LINK1 light. A solid green light indicates an active connection. If the light is solid red, try the following steps to resolve the issue.

    1. Ensure both antennas are securely connected to the main and diversity ports on the gateway and positioned to maximize cellular signal strength. After confirmed, reboot gateway.

    2. Verify Verizon coverage using Verizon’s coverage checker.(https://www.verizon.com/coverage-map/). If needed, check whether alternative carriers (such as AT&T or T-Mobile) provide better reception. We recommend consulting local site contacts for assistance.

  4. If the above are verified OK and the application still indicates N/A in the data stream, please contact Support.

Values of -99 Populate Data Stream

A value of -99.0 indicates a Modbus communications issue.

To resolve this issue, take the following steps:

  1. Verify that the asset communication port settings align with the specifications in the controller-specific installation instructions.

  2. Confirm proper wiring connections between the gateway and controller.

  3. Power cycle the equipment controller.

One or Both Relays on Wire Harness Not Functioning

Command to trigger on/off from platform is failing

  1. Make sure there are no –99 values shown on the platform for the equipment under consideration.

  2. Listen for click sound when a particular output is triggered on/off from platform.

Sound may become overwhelmed/masked by the noise of other equipment.

  1. Connect a multi-meter in continuity measurement mode between Blue and White/Blue wires for checking relay #1 or Brown and Green/ Yellow wires for checking relay #2.

Be sure to disconnect wires from the controller, which must be absent any voltage before testing. When the output is initiated from the platform, relay contacts should close and when turned off, the contacts should open.

  1. If the above steps do not resolve the issue, the harness may need to be replaced. To do so, place an order using part number A0009887772 by submitting a Support ticket. Once the new harness arrives, follow these steps again.

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