¶ WatchMonCORE and Expansion Board 3 Hardware Guide and Pin Assignment
The purpose of the Expansion board is to connect and add extra relays and inputs to trigger external devices such as a fan, heater, contactor, circuit breaker, etc.
The WatchMon has one onboard relay, if you want more outputs the expansion board is ideal. If not communicating with an inverter via CANbus, this helps turn on chargers or loads.
WatchMonCORE is the latest supervisor and is now the core building block.
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¶ Hardware Guide and Pin Assignment
¶ Connecting LongMons to CMU Serial Port
- Best to number the first cells from Negative in increasing order
- Hi-speed CMU serial with the isolation moved to separate IsoMon3 for single-cell monitors (i.e. LongMon, BlockMon, and LeafMon)
- CMUConnect and IsoMon3 are NOT interchangeable
- WatchMonCORE requires an IsoMon3, the use of a CMUConnect will damage the WatchMonCORE product
Follow the commission and troubleshooting guides to install:
¶ Connecting to ShuntMon
CMU and Shunt serial ports have different sets of pins to avoid damage or confusion.
¶ Connecting to Inverter / Charger using CANbus
Here is our list of compatible inverters/chargers.
¶ Powering WatchMonCORE Supply
For high-voltage battery pack systems, it's best to adopt a Fully isolated DC-DC to provide a supply voltage of either 12v or 24v, depending on the application.
- Built-in 8v to 30v DC-DC supply
- Consumes ~1.7W with WiFi enabled (typical 48v battery budget 1Ah / day)
¶ Controlling an Output/Fan from the WatchMonCORE Onboard Relay
- Mechanical relay Max 30Vdc 5A
- Labelled as Relay A
- User-defined function
¶ Controlling an Output/Fan from the Expansion Board-E3 using a Relay
- Up to 3 Mechanical relay Max 30Vdc 5A
- Labelled as Relay 1, 2, and 3
- User-defined function
¶ Controlling an Output/Fan from the Expansion Board-E3 using a Solid State Relay SSR
- Up to 3 Solid State Relay SSR 3 to 65Vdc 5A (1-way disconnect)
- Labelled as SSR 5, 6, and 7
- User-defined function(s)
¶ Sensing Switch Signal from WatchMonCORE, Expansion Board-E3 using an Opto-Isolated Input
Inputs can be set individually.
| Setting | Definition |
|---|---|
| Run / Idle Mode | No function selected |
| Charge / Normal Mode | Force relay switch to ON |
| Critical Contact Sensor - On | Remote sensor not tripped |
| Critical Contact Sensor - Off | Remote sensor tripped |
| Remote Fault | Critical fault |
Purchase with the WatchMonCORE or order the Expansion Board 3 separately.