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
w w w .
m s r - e l e c t r o n i c
. d e
Page 4
| 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
ELECTRICAL CONNECTION 90-240 V AC / 24 V DC 15 VA (qualified technicians only)
FUNCTION OUTPUTS
Action
Reaction
Relay 1
(Alarm 1)
Reaction
Relay 2, horn &
flashlight (Alarm 2)
Reaction
Relay 3
(collective fault message)
Reaction
LED
Gas signal < alarm threshold 1
OFF
OFF
OFF
GREEN
Gas signal ≥ alarm threshold 1
ON
OFF
OFF
RED
Gas signal ≥ alarm threshold 2
ON
ON
OFF
RED
Gas signal < (alarm threshold 2 -
Hysterese) aber ≥ alarm threshold 1
ON
OFF
OFF
RED
No alarm, no fault
OFF
OFF
OFF
GREEN
No fault, but maintenance due
OFF
OFF
OFF
GREEN flashing
Internal error
OFF
OFF
ON
YELLOW
Note Relay 1 & 2:
Status OFF means: “Alarm off“ = Relay coil energized
Status ON means: “Alarm on“ = Relay coil de-energized
Note Relay 3:
Status OFF means: “No fault and MSC2 in normal operation“ = Relay coil energized
Status ON means: “ Fault ON or MSC2 without tension“ = Relay coil de-energized
Note 1: Status OFF = Relay is configured “Alarm ON = Relay“ or the MSC is free from tension.
Note 2: Alarm thresholds can have the same value, therefore the relays and/or the horn and flashlight can be triggered
together.
0.5/ 1.0 Vol %
1.0/ 1.8 Vol%
Alarm Threshold
Selectable via Jumper
Power
Supply
230 V AC
(1 Vol %)
Relay
Alarm 1
(1.8 Vol %)
Relay
Alarm 2
Relay
Fault
X1
X2
X3
X4
1
1
1
2
2
2
3
3
1
1
1
PE N L
2
2
2
2
V-
3
3
3
3
V+
+
2
4
V
G
N
D
Multi Sensor Controller MSC2 -Carrier-
CO2
Sensor
Field Bus
Digital
Output
S
C
2
-I
11
6
4
-B
G
N
D
D
I_
1
P
o
w
e
r
U
n
it
9
0
t
o
2
4
0
V
A
C
2
4
V
D
C
,
1
5
V
A
D
I_
2
G
N
D
H
o
rn
X
1
2
1
X
1
3
B
U
S
_
A
B
U
S
_
B
X
1
1
Digital
Input
Acknow.
Horn
(1.8 Vol %)
Alarm 2
(0 - 5 Vol %)
3 4
A
O
_
0
1
G
N
D
F
la
s
h
li
g
h
t
(O
p
ti
o
n
)
* Connect to ground, if at 230 V supply, a potential
difference to tground (floating ground) isn’t allowed.
