Specifications

T4
T4.18
GE Power Controls
Comfort Functions
Pulsar TS
Staircase switches
Function and range
A staircase light switch is a special purpose delay-
off timer.
In addition to a delay-off timer, the staircase switch
will allow a certain amount of (limited) current to
pass through the coil without energisation. This
current usually comes from illuminated push-buttons,
used to help people in a dark staircase find these
push-buttons.
The range of Pulsar TS staircase time switches
includes:
- An electromechanical controlled device, with a
very competitive cost and with an acceptable
accuracy (see fig.1 for timing details)
- Electronic controlled devices for applications
where a higher accuracy is needed (same
timing diagram as for the electromechanical
device, see fig.1)
- A device with a built-in ‘end of light on’ pre-
warning by means of briefly switching off and on
again the load at the end of the cycle (flasher
function; can be used with all different kinds of
loads) (see fig.2)
fig.1
Timing diagram for standard electro-
mechanical and electronic staircase switch
- A device with built-in ‘end of light on’ pre-warning
by means of dimming the load at the end of the
cycle (dim-function; can be used only with
resistive and incandescent loads) (see fig.3)
- A dim add-on module which can be used in combi-
nation with the standard electromechanical as well
as with the standard electronic staircase switch.
Features and benefits
Figures 4 and 5 show the front and what’s behind the
cover for the PLT S M
A , PLT S E B and PLT S F
C staircase time switches and for the PLT S D D
dim add-on module.
Besides the delay-time dial
1 , all staircase
switches have a permanent on and off override
switch
2 and for the electronic devices an output
status indication LED
3 .
The function of the staircase time switch or the
circuit that it operates can be indicated behind
the circuit indicator 4 i.e. hall, staircase west,
staircase east. The clearly marked Pozidriv safety
terminals
5 are all captive.
fig.2
Timing diagram for electronic staircase
switch with flasher pre-warning
fig.3
Timing diagram for electronic staircase
switch with dim-function
fig.4
fig.5
1
5
3
A B C D
1
4
2
2