Wiring a Fan

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

  1. Wiring to Expansion2 board Relay1 or 2
  2. Wiring to Expansion2 board Solid State Relays 3 or 4
  3. Wiring to WatchMon Core onboard Relay A
  4. Wiring to Expansion 3 board Relay 1, 2 or 3
  5. Wiring to Expansion 3 board Solid State Relays 4, 5 or 6
  6. Wiring a Fan to On-board Mosfet Output WatchMon - 5pin
  7. Wiring a Fan using Supply DC-DC to On-board Output WatchMon - 5pin
  8. Wiring a Fan to On-board Mosfet Output WatchMon - 4pin
  9. 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 Expansion2 or Expansion3 Solid State Relays 60V/5A can be used.  The Mechanical Relays on Expansion2 and Expansion3 are rated to 30V/5A only

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

1.  Wiring to Expansion2 Relay1 or Relay2

 Note: that Relay1 and Relay 2 are mechanical and hence rated to 30V/5A

2.  Wiring to Expansion2 board Solid State Relays 3 or 4

Note: that Relay3 and Relay 4 are solid state relays and hence rated to 60V/5A

3.  Wiring to WatchMon Core onboard Relay A

Note: that Relay1 and Relay 2 are mechanical and rated to 30V/5A

4.  Wiring to Expansion 3 board Relay 1, 2 or 3

Note: that Relay1, 2 and 3 are mechanical and rated to 30V/5A

5.  Wiring to Expansion 3 board Solid State Relays 5, 6 and 7

Note: that Relay5, 6 and 7 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 WM4/5/7.  5 pin output version includes a Output P for Power and this is attached to the Pos

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

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

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

9.  Wiring a Fan using Supply DC-DC to On-board Output WatchMon - 4pin

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.

Locating Input & Output Connections on WatchMon4

The options for what to trigger the fan would be " Cooling Required"  These are controlled using the Thermal Control Settings

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