BENSHAW RediStart MX3 Series, User Manual

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3.11.6 SW1 DIP Switch
The SW1 DIP switch on the card changes the analog input and analog output between 0-10V or 0-20mA. The picture below shows how to
adjust the switch to select the desired signal.
3.11.7 Motor PTC
Terminal block J7 is for a PTC (positive temperature co-efficient) motor thermistor. This input is designed to use standard DIN 44081 or
DIN 44082 thermistors. The specifications of the input are as follows;
- Trip resistance 3.5K, ± 300 Ohms.
- Reset resistance 1.65K, ± 150 Ohms.
- Open terminal voltage is 15V.
- PTC voltage at 4Kohms = 8.55v. (>7.5V)
- Response time adjustable between 1 and 5 seconds.
- Maximum cold resistance of PTC chain = 1500 Ohms.
An example of the thermistor wiring is shown below.
See Also Motor PTC Trip Time (PFN27) on page 104.
3.11.8 RTD Module Connector
Connector J1 is for the connection of Benshaw Remote RTD Modules. These modules can be mounted at the motor to reduce the length
of the RTD leads. The connector is a standard RJ-45. The wires connect as follows;
4 - B(+)
5 - A(-)
8 - common
47
3 - INSTALLATION
ANALOG OUTPUT
SW1-2
ON = 0-10V
OFF = 0-20mA
ANALOG INPUT
SW1-1
ON = 0-20mA
OFF = 0-10V
Figure 24: SW1 DIP Switch Settings
J7
Figure 25: PTC Thermistor Wiring