6.
1.
At commissioning and after modification of the plant, check the sensor resistance with a suitable measuring instrument. If
the resistance between terminals 1 and 2 is <50 Ω, examine the sensor circuit for a short circuit.
3.5 Maximum Current on MCB 112
PTC
M 3~
TP
TP
12 13 18 19 27 29 32 33 20 37
e3
0b
b1
61
.1
4
12
03
0-
12
02
-0
1
X44
www.ziehl.de
T1
1
T2
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
9
NC
11
T37
12
OUT
10
LOGIC
SAFE STOP
0102
Motor protection
10
12
20-28 VDC
20-28 VDC
10 mA
60 mA
PTC
ZIEHL industrie-elektronik GmbH + Co KG
Daimlerstrasse 13, 74523 Schwäbisch Hall
MCB 112 PTC
Code No. 130B1137
SEE MANUAL FOR
ADDITIONAL INSTRUCTIONS
PTB 14 ATEX 3012U
II (2) G [Ex eb Gb] [Ex db Gb]
II (2) D [Ex tb Db]
!
Thermistor Option B
Illustration 5: Wiring Diagram
T10
10 mA
T12
60 mA
Terminal 12
24 V DC supply voltage
Terminal 13
24 V DC supply voltage
T37 (X44/12)
Output terminal on the VLT
®
PTC Thermistor Card MCB 112 option.
Terminal 37
Input terminal on the control card.
X44/10
Logic output signals the status in case of failure.
3.6 Wiring of STO
Procedure
Remove the jumper wire between control terminals 37 and 12, or 13.
Cutting or breaking the jumper is not sufficient to avoid short circuiting.
AQ267038105120en-000101 / 130R0104
16 | Danfoss A/S © 2022.08
Installation
VLT® PTC Thermistor Card MCB 112
Operating Guide
Summary of Contents for VLT PTC Thermistor Card MCB 112
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