Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 211 of 265
28.5.6 Flashing Amber Wig-Wags
Figure 38 – Flashing Amber Wig-Wag Signal
In addition to the flashing red Wig-Wag Signals shown previously, the controller is
capable of driving and monitoring flashing amber Wig-Wag Signals, e.g. at cattle
crossings.
If lamp monitoring is required, with or without ‘red’ lamp monitoring options, then it is
recommended that the sequence used for the flashing red Wig-Wag on two phases
is used, but amber coloured aspects are fitted instead of red. The fixed 5 second
amber period in the lamp sequence can be deleted from the Lamp Sequence using
IC4.