Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual, Page: 90 / 252

OPERATION
Protection Features
90
Motor Temperature Protection with PT100 or PTC Sensor
PT100 and PTC (Positive Temperature Coefficient) sensors relay motor temperature readings to the VFD,
which, depending on its programming, can protect the motor by lowering output frequency, stopping oper
-
ation, etc. Two sensors of the same type (PTC or PT100) can be connected and operate simultaneously. In
this case, only one sensor needs to reach the specified temperature level to trigger motor protection.
If using a PT100 or PTC for PID Feedback or Aux AI, set the maximum value to 200 °C for PT100s and T
HIGH
for PTCs in
PID F/B Max [SET-20]
and
Aux Max Value [ADV2-61]
, respectively.
PT100 Sensor
To enable PT100 Motor Temperature Protection, install the sensor directly into the motor. Then complete the
wiring and adjust parameters as specified below:
3-Wire PT100 Wiring
4-Wire PT100 Wiring
ACI Input Sel [IO-00] or AVI1 Input Sel [IO-05]: In the appropriate parameter (ACI or AVI1), set to
4 _PT100 & AFM2 .
PT100 Level 1 [PROT-30]: Set temperature level for the first sensor. When the sensor detects the motor
temperature above this setting for the duration entered into [PROT-33] , it will refer to [PROT-32] for VFD
response.
PT100 L-1 Delay [PROT-33]: Enter the time delay between a high motor temperature detection and the
VFD’s response.
PT100 L-1 Freq [PROT-32]: Select the fall-back level of the output frequency once a high temperature level
[PROT-30]
is sensed for a predetermined length of time
[PROT-33]
.
NOTE: If the motor temperature falls below PT100 Level 1 [PROT-30] , the drive returns to normal operation.
PT100 Level 2 [PROT-31]: Set temperature level for the second sensor. When the sensor detects the motor
temperature above this setting, it will refer to
[PROT-19]
for VFD response.
PTC/PT100 Sel [PROT-19]: Select the VFD response to sensing the motor temperature selected in [PROT-31] .
PTC Sensor
1. Connect a 2-wire PTC sensor between an analog output (either AFM1 or AFM2) and an analog input
(ACI or AVI1).
2. Set the analog output DIP switch to 0-20 mA.
3. Set the analog input DIP switch to 0-10 V.
4. Adjust the following parameters:
Signal Wires
Terminals
AVI1: PT100 & AFM2 ACI: PT100 & AFM1
V- N/A - -
I- Green ACM ACM
V+ White AFM2 (dip switch 0-20mA) AFM1 (dip switch 0-20mA)
I+ Brown AVI1 (dip switch 0-10V) ACI (dip switch 0-10V)
Signal Wires
Terminals
AVI1: PT100 & AFM2 ACI: PT100 & AFM1
V- White - -
I- White/Blue ACM ACM
V+ Red/Blue AFM2 (dip switch 0-20mA) AFM1 (dip switch 0-20mA)
I+ Red AVI1 (dip switch 0-10V) ACI (dip switch 0-10V)