Comet MS6D, Instruction Manual, Page: 18 / 56

18 ie-ms2-MS6-10
Connection of output ALARM OUT
This output je accessible on terminals next to data logger power terminals. Output is dual:

switching-over galvanically isolated relay contact

voltage (galvanically connected to data logger)
The output is set from the manufacturer, that in case of selected alarm voltage appears at the output
and simultaneously relay closes. It is enabled to set opposite behavior in data logger configuration
(then data logger power dropout behaves as alarm state).
Activity of this output can be cancelled from data logger keyboard by the user or remotely from the
PC. It is enabled to identify by proper data logger configuration, who cancelled the alarm.
It is possible to connect to this output:

External audio indication unit - use shielded cable up to 100m from data logger. Connect
terminal ALARM OUT and GND on data logger with the audio unit in corresponding polarity.
Connector CINCH of audio indication unit has positive pole on its central lead.

Telephone dialer
–
in case of alarm telephone dialer dials specified telephone number and
announces voice message. Depending on telephone dialer type use voltage output or relay
contact.

Simultaneously galvanically isolated contact relay can be used for control of other devices. If
indication controls external circuitry, it is recommended to set delay after activation at least 10
seconds to prevent possible false alerts.

Mind to adjust suitable delay for proper conditions of alarm creation to prevent possible false
alarms.
3.3. Mounting and connection of output relays module MP018 and MP050
Module contains 16 output relays with switching-over contact, which can be used for control of
external devices (see parameters of relay ). It is possible to assign any number of relays to any alarm to be
closed if alarm appears. Relays are identified by numbers 1 to 16. Each relay has three self-locking
terminals (switching-over contact). Activity of relay can be checked visually on assigned LED diodes.
Relay module MP018 is designed for mounting to switchboard with corresponding protection. Fix
module (140x211 mm) by means of DIN rail holder MP019 or screw by means of side wall holders MP013
with four suitable screws (mounting holes are identical as for data logger with wall holders MP013, see
figure above). Connection of MP050 module with MS6-Rack is mentioned in Introcuction part of this
manual.