P E R F E C T S O L U T I O N S I N
G A S A L A R M
S Y S T E M S
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| Dec. 2015
Po ly Gar d ® 2 M SC 2 – Dat a Sh eet an d Us er M an u al
MSR-Electronic GmbH
::: Würdinger Str. 27 + 27A ::: 94060 Pocking
::: Germany
Specifications subject to change without notice
PolyGard® is a registered trademark of MSR-Electronic GmbH
Relay Mode
Definition of the relay operation mode. The terms energized / de-energized for this menu item come from the terms
open-circuit and closed-circuit principle used for safety circuits. Here, however, not the relay contact circuit is meant
(because realized as a changeover contact, optionally available in the two principles), but the activation of the relay coil.
The LEDs attached to the modules show the two states in analogy. (LED off -> relay de-energized)
Relay Function Static / Flash
Definition of the relay function: The function "flashing" represents a connection option for warning devices to improve
visibility. If” flashing” is set, this must not be used as a safe output circuit any more.
A combination of relay mode energized with flashing operation makes no sense and is therefore suppressed.
Horn Function (not safe output circuit because resettable)
The horn function is considered active if at least one of the two parameters (time or assignment to digital input) is set.
The horn function retains its functionality even for alarms in latching mode.
Special function Recurrence of the horn relay
After an alarm has been triggered, the horn will remain active until it is acknowledged. After acknowledgment of the horn
relay/s (clicking a button or via external input) a timer starts. When this time has run out and the alarm is still acting, the
relay is set again. This process is repeated endlessly as long as the associated alarm remains active.
Alarm 2
Relay 2
Gas concentration higher lower than threshold
Acknowledging-
signal
On
Off
On
Off
On
Off
Time
Time
