Wiring a Fan, Contactor etc

Warning: If powering an expansion board it should be at the same Voltage as the WatchMon.

Warning: For large (or unknown) loads make sure you use an external relay/SSR (solid state relays) that is appropriate for the rated purpose.

Choose appropriate option for your needs

Options for Wiring include

Wiring to WatchMonCORE onboard Relay A
Wiring to Expansion 3 board Relay 1, 2 or 3
Wiring to Expansion 3 board Solid State Relays 4, 5 or 6
Wiring to Expansion 2 board Relay 1 or 2
Wiring to Expansion 2 board Solid State Relays 3 or 4
Wiring a Fan to On-board Mosfet Output WatchMon - 5pin
Wiring a Fan using Supply DC-DC to On-board Output WatchMon - 5pin
Wiring a Fan to On-board Mosfet Output WatchMon - 4pin
Wiring a Fan using Supply DC-DC to On-board Output WatchMon - 4pin

Limitations

With a 48V circuit breaker an external relay appropriately sized, Mosfets that can handle 48V on either the WatchMon or Expansion 2 or Expansion 3 Solid State Relays 60V / 5A can be used. The Mechanical Relays on Expansion 2 and Expansion 3 are rated to 30V / 5A only

Expansion board if powered should be at the same voltage as the WatchMon.

1. Wiring to WatchMonCORE Onboard Relay A

Mechanical relay Max 30Vdc 5A
Labelled as Relay A
User defined function

2. Wiring to Expansion Board 3, Onboard Relay 1, 2 or 3

Up to 3 Mechanical relay Max 30Vdc 5A
Labelled as Relay 1, 2, and 3
User defined function

3. Wiring to Expansion Board 3,

Onboard Solid State Relays 5, 6 and 7

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)

4. Wiring to Expansion Board 2, Relay 1 or Relay 2

Note: Relay 1 and Relay 2 are mechanical and hence rated to 30V / 5A

5. Wiring to Expansion 2 Board Solid State Relays 3 or 4

Note: Relay 3 and Relay 4 are Solid State Relays and hence rated to 60V / 5A

6. Wiring a Fan to On-board Mosfet Output WatchMon - 5pin

Note: Mosfets are used for onboard outputs on WM 4 / 5 / 7. The 5 pin output version includes a Output P for Power and this is attached to the Positive.

Warning: Mosfets should only be used with items of known inrush within the rating of the mosfet. If unsure use a relay.

If powering WatchMon using your battery pack, the fan should be the same voltage as the battery pack voltage.

7. Wiring a Fan using Supply DC-DC to On-board Output WatchMon - 5pin

Please Note that DC-DC should be used to power WatchMon at the voltage you need for your outputs. Therefore if using a 24V fan or contactor then use the appropriate DC-DC to feed 24V into the WatchMon.

The DC-DC should be before the power not between the WatchMon and load. Placing the DC-DC after the output voids the warranty.

8. Wiring a Fan to On-board Output WatchMon - 4pin