User Manual: Switch-Control 63400
Page 13
7. Tips & Tricks
7.1 Connecting an additional lamp to indicate position “green”
As described in Example 6.2, an accessory may be switched through a single key and overseen by one lamp
output. While the key will toggle the accessory position between “red” and “green,” the lamp output will
only be activated when the accessory is in the “red” position. The following external transistor circuit may
be added to activate a second lamp (green) when the lamp output of the Switch-Control is not active.
7.2 Using a lamp to indicate multiple routes
When indicating several routes on a TDCB with illuminated paths, certain portions of a path may be found
within multiple routes. To display a path with multiple lamps, diode logic circuits may be added to allow
each output to control more than one lamp at a time.
Example track plan:
Based on the example track plan above, the routes listed below may be created. When each route is called,
the corresponding lamp output of the Switch-Control will also be activated:
Route 1 (from A to C)
Activate lamp output 1 (lamps L1 and L2)
Route 2 (from B to C)
Activate lamp output 2 (lamps L2 and L3)
Route 3 (from A to D)
Activate lamp output 3 (lamps L1 and L4)
Route 4 (from B to D)
Activate lamp output 4 (lamps L3 and L4)
The following diode matrix can be used to control the TDCB lighting:
Diodes such as the 1N4001 can be used. If using LEDs with series resistors for all indicators, 1N4148
diodes may also be used due to the lower current requirement.
(Ground)
Lamp
Output
Red
Green
2N3904
Lamp L1
Lamp L3
Lamp L2
Lamp L4
Lamp
Output 1
Lamp
Output 2
Lamp
Output 3
Lamp
Output 4
Output
+
