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Technical data
C.7 Technical data and identification of the PTC thermistor input at peripheral boards 2 and 4
C.7
Technical data and identification of the PTC thermistor input at
peripheral boards 2 and 4
PTC thermistor input - Data
Application
Identification
maximum number of sensors
OK state
Overtemperature message
Short-circuit in the sensor circuit
Measuring circuit load
Voltage in the sensor circuit
Current in the sensor circuit
Voltage for measuring sensor break 11.6 V
Current for short-circuited sensor
circuit
Response time
Electrical design
Maximum cable length for PTC thermistor sensor circuit:
Cross-section 2.5 mm²
Cross-section 1.5 mm²
Cross-section 0.5 mm²
You can use the PTC input for monitoring motors in non-hazardous zones.
The PTC thermistor evaluation function can be deactivated by an internal switch. For this
reason, perform the test described in Chapter "PTC inputs for motor PTC thermistor
(Page 35)". If the result of the test is negative, contact the Service Center for advice.
142
For monitoring the temperature of standard motors outside a hazardous zone
no ATEX marking in conjunction with DYNAVERT I
6 sensors according to DIN VDE 0660 Part 303
< 1.5 kΩ ... 1.8 kΩ
> 3.2 kΩ ... 3.8 kΩ
< 15 Ω ... 25 Ω
< 5 mW for R = 1.5 kΩ
< 2 V for R = 1.5 Ω
< 1.5 mA for R = 1.5 kΩ
1.45 mA
≤ 75 ms
Safe isolation for 690 V from the other switching circuits according to EN 50178,
EN 61800-5-1
2 × 500 m
2 × 300 m
2 × 100 m
Installation and Operating Instructions for LOHER DYNAVERT I Series 7
Operating Instructions, 10/2022, 4BS0745-002
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