Specifications

GEMINI

Traffic Outstation Handbook

667/HB/32600/000 Page 144 Issue 11

Note:The OMCU can monitor the MOVA vehicle detector inputs on the MOVA I/O

board. Therefore these detectors do not need to be wired into the OMCU’s LMU I/O

board(s) as well as the MOVA I/O board. See section 5.6.3 which starts on page 91.

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).

This 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.

9.2.2 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.

9.2.3 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.

9.2.4 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.

An alternative cableform is available which simplifies connecting the MOVA unit up to a

Siemens T400 traffic controller and this is described on page 146.