Siemens ST950 - Pedestrian Tactile Indicators

Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
Unrestricted
Page
73 of 154
Version
7
Status
Issued
Last Editor
manpreet.jeerh
Date
January 2020
Document Name
ST950 ICM Handbook
Document No.
667/HE/45950/000
Copyright © Siemens plc 2020. All Rights Reserved. Mobility is a division of Siemens Plc
4.16 Pedestrian Tactile Indicators
The ST950 ELV controller can be fitted with either switched or non-switched
tactiles.
Non-switched tactiles are wired directly across the pedestrian green. Whenever the
pedestrian green is illuminated, the tactile rotates. These tactiles must not be used
at crossings with a flashing green man period.
The connections required for a non-switched tactile are shown in Figure 36
Switched tactiles are tactiles that can be disabled when required by use of an IO
card output.
The connections required for a switched tactile are shown in Figure 37
Some manufacturer’s tactiles (e.g. Radix Traffic ITE220) also have a fault output
that can be wired back to an input of a digital IO card in the controller cabinet. This
fault output has the following functionality:
ITE220 Function
Fault Output
Tactile not powered
Open-circuit
Tactile powered and stalled (held or stuck)
Open-circuit
Tactile powered and motor open or short circuit
Open-circuit
Tactile powered and cone able to rotate
Closed-circuit
Special conditioning in the controller will discriminate between short-duration fault
conditions (such as the tactile being temporarily held stalled) and a permanent fault
that requires maintenance.
The connections required for a switched tactile with fault output is shown in Figure
38
There are several mounting options for the tactile controller module;
When using tactiles with integrated motor and drive module, the assembly can be
mounted in the pedestrian indicator.
When using tactiles with separate motor and drive module , the drive module can
be mounted inside the nearest Helios signal head (the recommended position for
mounting the tactile controller is at the top of the Amber aspect case – see Helios
General Handbook 667/HB/30000/000) or the drive module can be mounted inside
the traffic controller cabinet.
Figure 36, Figure 37 and Figure 38 show how tactiles can be connected to an ELV
traffic controller.
A maximum of 4 tactiles (either switched or non-switched types) can be driven in
parallel from a single LSLS output.