User Manual – EC II GSM SE
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The maximum load on the output is 100 mA (continuously) to not influence the battery opera-
tion time of EC II GSM SE. For shorter periods it can be on load with up to 500 mA e.g. for the
external alarm bell. If the lift does not have a double-breaking alarm button this output to-
gether with the build-in relay output on central unit can be used to activate an external alarm
bell, which can be connected in series with relay output and 12V DC output.
The output is protected with fuse against possible short circuit and overload, see section 14
below.
6.1.9 Relay output
There is a potential free connection on the central unit with relay function. Default the relay is
activated if any of the alarm buttons is pressed down and will remain activated as long as the
alarm button is activated. The relay can also be programmed to be activated remotely, see
section 8.4.15 below.
The relay is not affected by the alarm button delay or if filter function is activated. The relay
output is of the type normally open (NO) and may be on load with maximum 50V 1A.
This output can be used to control external devices such as door locks or to activate an alarm
bell if the lift existing alarm button not is of double-breaking type. See section 6.1.8 above
.
6.1.10 Filter input
To reduce the number of false alarms, it is possible to connect the EC II GSM SE to the con-
trol equipment of the lift via the built-in filter input. By letting the lift decide if lift alarm should
dial out; the number of false alarms can be reduced. For this function the control equipment of
the lift must be able to generate a signal that the EC II GSM SE can use. Possible additional-
connected alarm buttons (ALBU) are not affected by this filtering.
As a security reason it is possible to bypass an active filter if the alarm button is pressed for
more than 30 seconds.
The function is activated with a special programming sequence, see section 8 below
.
6.1.11 Loop amplifier
To enable passengers with impaired hearing to communicate with alarm centre there is a
possibility to connect a loop amplifier. Contact your local distributor or Rocom GmbH for in-
formation about approved loop amplifier to be used with EC II GSM SE.
The loop amplifier output on EC II GSM SE has a signal level of 50-100 mV and an internal
impedance of 1 kΩ. Suitable load impedance is 10 kΩ. The output can be short circuited with-
out causing any damage.
The loop amplifier must work during power failure. Connect it to a power supply that is work-
ing during power failures. It can be connected to the EC II GSM SE’s own 12V output only if it
fulfils the requirements which are described under the section 6.1.8 above
.
6.2 Installation of speech unit
Select a suitable place for the speech unit. Avoid installing it in a corner or behind anything
that may reflect the sound. This might lead to acoustic feedback instability between the loud-
speaker and the microphone.
Summary of Contents for EC II GSM SE
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