Manual
8
SignalLED User Handbook
INSTALLATION
INSTALLATION
2
sign and are pulled low (to 0V, pin 3) to activate on signs manufactured before 14/10/2011.
If driving more than one LED sign from the signalling inputs, or power supply, then the LED
sign pins should be diode protected to prevent a reverse current condition.
Please note pins 3 (0V) and 1 (input 1) are linked by default so that the sign will illuminate
in its default mode when rst powered up.
The power supply 0V is then inserted into pin 3 along with the link and the +6V supply into
pin 2. The positive voltage is normally marked by a white stripe on the relevant wire - test
this with a voltmeter if you are unsure.
If the sign needs to be controlled externally, remove the link and t a switch or other contact
closure. If you wish to use the sign in its alternate mode, remove this link and link pin 4 to
pin 3 instead.
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adjust the mode switches (see following for information on this). Do not fully remove the
screws from the terminals - they only need 2 or 3 full turns to accept the wire ends. Also,
take care not to apply too much force to the connection block when tting the wire ends, as
this could damage the PCB.
When the power and signalling connections have been made and the mode switches set
up, close the access door by pressing the clip back to its original position. It will click into
place when it is fully home.
After all of the terminations have been checked and the cables have been routed through
the cable clamps, close the end cover by reversing the opening procedure, taking care not
to overtighten the retaining screw.
Input 1 Led Sign 1
Input 1 Led Sign 2
Two LED signs with a common input
1 connection to 0v