UTMC OTU/MOVA Handbook
667/HB/31601/000
Page 138
Issue 5
K.1 DETECTOR INPUTS AND PUSH-BUTTONS
The detector inputs are normally connected in parallel to the controller at the controller’s
terminal blocks.
:
Ensure that the detector inputs have been configured in the correct sense
in the MOVA site data. For example, on a Siemens T400 or ST800/700
controller, the detector inputs are normally open circuit, closing when a vehicle is
detected.
It is recommended that Push button inputs be configured as follows…
The controller should be configured to provide an output for each pedestrian phase,
which is then connected to the configured MOVA pedestrian detector input, rather than
connecting the MOVA unit directly to the push-button input(s).
The pedestrian demand output should be activated when the controller has a demand
registered for that phase and thus are sometimes referred to as a ‘wait confirms’. But
note that they must be configured in the same sense as the detectors (e.g. normally
open, closing when a demand has been latched), which may be in the opposite sense
to the stage- and phase-confirm outputs.
Confirms and Controller Ready Inputs
The stage- and phase-confirm outputs from the controller should be configured as held
closed, opening when the stage/phase is active. The Controller Ready Bit should be
closed when the controller is ready.
Therefore, being physically normally open contacts, if the controller fails, then the
MOVA unit will see the controller ready bit disappear and multiple stage confirms, and
thus it will release control of the junction.
Force Bits and Take Over Outputs
When the MOVA unit is on control, it closes the ‘Take Over’ relay output and closes the
required stage force bit relay output.
I/O Allocation
The standard cableform connects into these connectors and provides flying leads for
each pin. Since there are two connectors on each BUS / MOVA (Digital) I/O board, PL1
and PL2, then each board requires two identical cables. It is therefore recommended
that the cableforms be clearly identified before installation commences.
The wire colours used are described on the following page.
If more inputs are required, then a second BUS / MOVA (Digital) I/O board can be fitted,
also shown on the following page. This increases the number of detector inputs by 32
and the number of confirm-inputs by 16. See table above for details.
