Specifications

GEMINI
2
Traffic Outstation Handbook
667/HB/32600/000 Page 65 Issue 11
(d) A maximum of 3 off blanking plate kits 667/1/31614/000 or ST4R Detectors
667/1/27663/000 or any combination thereof are also required. That is:
If there are no detectors, 3 off blanking plates are required.
If there is one detector, 2 off blanking plates are required.
If there are two detectors, 1 off blanking plate is required.
If there are three detectors, no blanking plates are required.
If you remove the main rack blanking plate on a 19" rack (in order to fit more than
3 detector backplanes) you will need to order and install blanking plates to fill
unused positions in the rack. A total of 7 blanking plates, minus the number of
backplane/detector card combinations fitted, will be needed.
NB: The outputs from detectors are pre-wired to Outstation digital inputs, starting
from digital input 17 onward.
(e) The 11" rack can only support the 3 detector backplanes currently available.
The 19" rack can support up to 7 backplanes.
(f) A supply for the detectors is required either from the controller or a standalone
detector supply kit. For example, a standard STC 24 AC detector supply kit may
be fitted, which will supply at least 15 Detector cards - 667/1/20292/008.
(g) For the semi-integral UTMC OTU, any loops required for SCOOT, N+1 count, or
occupancy should be wired directly to the Gemini unit, rather than via the STC
controller.
Front of UTMC OTU with 2U modem shelf and detector blanking panels