How to connect the CellMon modules to the WatchMon4

Connecting the CellMon and CMU cable to WatchMon4

Connect the CMU cable (grey cable with blue heat-shrink) to the blue indication painted on the WatchMon4 cover as per photos below:

Why do I need the CMU cable?

This allows the WatchMon4 hardware to be installed at a higher and unobstructed position outside the battery box. This also improves the Wifi signal significantly. The CMU cable makes connecting the CellMons much easier and more intuitive, using the existing connectors rather than having the risk of connecting something wrong and damaging the WatchMon or CellMon hardware.

It is recommended to start by connecting cell#1 (the most negative battery) to the 4 pin CMU cable connector (small black box highlighted on the photo below). Then, work up the chain to the most positive battery, finishing the chain back on the 2 pin CMU cable connector.

CAUTION: Whilst preparing the cables for insertion into the WatchMon terminals, ensure that both the 2 pin and 4 pin connectors are not connected to the CellMon until after you have prepared the cables.

CAUTION: Whilst initially setting up the cell monitors, make sure to only have the USB plugged in and then attempt to connect the CellMon wires. We recommend that you disconnect the WatchMon power supply (2 pin connector) and all other cabling until you have successfully connected the CellMon network. Ensure that the software network testing utility has confirmed that the communication link is working properly.

Closer look of the CellMon daisy chain:

Different types of CellMons:

Multiple Cell Monitors or "multi string" configuration:

If your system has multiple Cell Monitors or "multi string" configuration, please refer to this link for more information: Multiple Cell Monitors or "multi string" configuration: adding batteries in parallel to the same WatchMon supervisor

Do you require longer cables?

The CMU cable (grey cable with the blue heat-shrink) can be extended if required. Make sure you use a dual-twisted-pair cable keeping one twisted pair for "Green/White" and another twisted pair for "Red/Black". Use a shielded cable if possible and try to keep the cable no longer than 4 meters long.

*Note: the white wire isn't very obvious in this photo as it blends with the white background

CellMon cables can be extended up to 4 metres, and the cable needs to be a twisted pair.

How to connect the CellMon modules to the WatchMon4

Multiple Cell Monitors or "multi string" configuration:

Do you require longer cables?

Next Steps:

Troubleshooting:

CellMon documentation: