Park Brake Connections and Switch Selection

Child Check-Mate System, Inc. can not make specific endorsements or recommendations of third-party products due to the variety of regulatory authorities (e.g. you may be required to follow different specifications in Dallas than you must in Dubai). As with any installation, your qualified technician should always confirm the most current laws, statutes and regulatory requirements and should always follow industry best practices.

Park brake connection is variable due to the multitude of park brake styles and connections. It is possible to monitor every style of park brake systems. Your technician will need to select the best way for your vehicle to be connected. 

You may be able to use a vehicle -generated signal or you may have to install your own switches to monitor the outputs.

Not sure if you need to connect to the parking brake? Click here for more information.

 Parking Brake Monitor Input Options

Using the Dedicated Parking Brake Input

This does not apply to units operating with software program ID ETA.
  • EP1plus - The Park Brake monitor input expects a ground when the park brake is set, and an open when the park brake is released.
  • EP2plus -  The Park Brake monitor input expects a high (12V) when the park brake is set, and an open when the park brake is released.
See  Drawing E005-002 for more information.
  • If Park Brake input is not connected it will need to be grounded to stop the system from alarming, and to allow the system to be deactivated.

Using the Door Monitoring Circuit

  • Units operating with software program ID ETA must use this method. All other units may optionally use this method however, it is in our opinion that all other software programs that require a park brake input use the dedicated park brake input. 
    • The door monitor circuit requires a ground indicate that a door is open, likewise the parking brake must see a ground if the parking brake is released.
    • Typical park brake functionality would require a reversal of logic using a relay as shown in  Drawing E005-001. 

Installation of New Switches/Switch Selection

If your installation requires a new parking brake switch. In general, the following should be considered:

  • The switch should be designed for automotive use.
  • For monitoring air brake lines:
    • Use components that - at a minimum - satisfy SAE recommendations.
    • In the US, you should always use  Department Of Transportation (DOT) approved connections. Elsewhere in the world, you should always use parts that comply with applicable standards & regulations. 

Connecting to Air Brake Lines

  • Confirm that it is legal to do so in your state, province or appropriate jurisdiction.
Child Check-Mate System, Inc. can not make specific recommendations due to the variety of vehicles, brake systems and regulatory authorities (e.g. you may be required to follow different specifications in Dallas than you must in Dubai). 

For convenience, here are a few examples of park brake pressure Switches that may be appropriate: 

Considerations

Anecdotally, we have been told that the Safety Brake Set needs very little pressure in the tank to function, while the Bendix LP2 or LP3 switch needs relatively more. We have not been able to confirm these assumptions as of yet.

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