TrakMate Relay Option

With the Relay Option the software can control the track power.  It will turn track power on at start of race and turn track power off at end of race.  It is important to have if you plan on doing lane rotation.    You can also add momentary on switches such as the Jumbo switch.  These switches would be used for 'track calls'.  For example if in a crash the car is difficult to retrieve you may wish to stop the race,  hitting the track call button will cut the power and stop the clock.  Hitting the button again resumes the race.  It is possible to install many of these switches, for example one at each drivers station.

The relay option plugs into  the PCs COM port normally used for connecting a mouse or an external modem.  Most PCs have two COM ports The COM port is normally a 25 pin or  9 pin male connector on the back of the computer.  Your computer may have one of each or two 9 pin connectors.  If the computer only has 9pin male connectors then an adaptor is required to go from 9pin to 25pin.

Installation of the Relay

The relay option cable has 4 wires.
The relay has 5 connections labeled 85,86,87a,87,30

Connect the Red wire to #85 on the Relay
Connect the Black wire to #86 on the Relay

#87a and #30 are the switch contacts to turn track power on and off.

Yellow and Green goes to COM and NO contacts on Jumbo Switch
See also Relay Installation Diagram