1 1 1
1 102 3 4 5 6 7 8 9 1211
2 2 3
1 1 1
1 102 3 4 5 6 7 8 9 1211
3 3 3
1 1 1
1 102 3 4 5 6 7 8 9 1211
2 2
2
130BA176.11
1 NC
2 Live part
3 PELV
Figure 7.8 Correct Relay Wiring
NOTICE!
Do not combine 24/48 V systems with high-voltage
systems.
7.11.3
VLT
®
PTC Thermistor Card MCB 112
The MCB 112 option makes it possible to monitor the
temperature of an electrical motor through a galvanically-
isolated PTC thermistor input. It is a B option for adjustable
frequency drives with STO.
For
dierent application possibilities, see
chapter 4 Application Examples.
X44/1 and X44/2 are the thermistor inputs. X44/12 enables
STO of the adjustable frequency drive (T37), if the
thermistor values make it necessary, and X44/10 informs
the adjustable frequency drive that a request for STO came
from the MCB 112 to ensure suitable alarm handling. One
of the digital input parameters (or a digital input of a
mounted option) must be set to [80] PTC Card 1 to use the
information from X44/10.
Congure 5-19 Terminal 37 Safe
Stop to the desired STO functionality (default is safe stop
alarm).
MS 220 DA
11
10
20-28 VDC 10 mA
12
20-28 VDC
60 mA
com
ZIEHL
X44
12 13 18 19 27 29 32 33 20 37
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
9
NC
10 11
NC
121
T1
2
T2
T
P
T
P
PTC
M3~
130BA638.10
DO
Motor protection
MCB 112 PTC Thermistor Card
Option B
Reference for 10, 12
DO FOR SAFE
STOP T37
Code No.130B1137
Control Terminals of FC302
Figure 7.9 Installation of MCB 112
ATEX Certication with FC 102, FC 103, FC 202, and FC
302
The MCB 112 has been certied for ATEX, which means
that the adjustable frequency drive with the MCB 112 can
be used with motors in potentially explosive atmospheres.
See the VLT
®
PTC Thermistor Card MCB 112 Instruction
Manual for more information.
Figure 7.10 ATmosphère EXplosive (ATEX)
Specications Design Guide
MG20N622 Danfoss A/S © 09/2014 All rights reserved. 187
7 7
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