7.3.10 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 VLT
®
AutomationDrive FC 302 with Safe Torque Off (STO).
For information on mounting and installing the option, see
the instructions that accompany it. For different application
possibilities, see
chapter 17 Application Examples
X44/1 and X44/2 are the thermistor inputs. X44/12 enables
Safe Torque Off of the FC 302 (T-37) if the thermistor
values make it necessary, and X44/10 informs the FC 302
that a request for Safe Torque Off has come from the MCB
112 to ensure suitable alarm handling. To use the
information from X44/10, 1 of the digital inputs of the
VLT
®
AutomationDrive FC 302 (or a DI of a mounted
option) must be set to PTC Card 1 [80].
Parameter 5-19 Terminal 37 Safe Stop
must be configured to
the desired Safe Torque Off functionality. Default is
[1] Safe
Stop Alarm
.
MS 220 DA
11
10
20-28 VDC
10 mA
12
20-28 VDC
60 mA
co
m
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
12
1
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 ST
OP
T37
Code No.130B1137
Control Terminals of FC302
Illustration 7.15 Installation of MCB 112
ATEX Certification with VLT
®
AutomationDrive FC 302
The VLT
®
PTC Thermistor Card MCB 112 has been certified
for ATEX, which means that the FC 302 together with the
MCB 112 can now be used with motors in potentially
explosive atmospheres. See the thermistor card for more
information.
Illustration 7.16 ATmosphère EXplosive (ATEX) Symbol
Ordering Information
VLT
®
Parallel Drive Modules
76
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MG37N102
7
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