MSA SUPREMATouch MCP 20, Operating Manual, Page: 165 / 241

165
Installation
GB
SUPREMATouch
Fig. 100 MRO8 TS Module
Relay monitoring
All relay outputs of the MGO20 are checked for the presence of all relays. If at the MRC module
not all relay modules are attached, then a dummy (MRD module) must be used for each missing
module, so that the relay monitoring does not generate an error.
The MRD module can be attached directly to the MRC module. The MRD module has LED
displays for the relay condition. Missing or defective relay modules are indicated with a red LED
on the MDO module, and at the same time an error message with "data acquisition error" is regis-
tered in the log.
System Fail Relay
There are two system fail relays on the MIB module, designed as changeover contacts. They are
operated according to the normally energized principle. Both relays are de-energized when a
failure occurs. The terminal contacts are located directly next to the relays on the MIB module.
Fig. 101 MIB Module, connection terminals for the system fail relay
c 1 a
EXT
INT
+
-
C
2
1
X
2
1
C
1
1
+
-
+
-
D
1
1
P
O
S
1
0
X 15
1
2
BAT
X
2
3
S
1
D
13
R
5
2
R
4
2
R
3
R
2
R
1
1
R
1
2
R
13
R
14
T1
T2
R
L2
R
L1 X601
D2 D1
X
2
2
O
N
3
4
5
6
7
8
9
12
11
10
D
12
1
10