Wiring Inputs - Quest Controls TELSEC MP2x User Manual

3.3 Wiring inputs

Wire each input to be used between the input terminal (1-32) and a common terminal (C). There is a
common terminal available for every two inputs available for termination.
power for sensor operation thus any device requiring power will need an external power source to
operate properly. Refer to the silkscreen on the enclosure for location of each input and common
terminal. The inputs will support any sensor that is a 10k Type III thermistor: 0-6 VDC or 0-20 mA analog
sensors. In addition, the system accepts dry contact closures or wet contact closures up to 65 VDC.
3.3.1 Thermistors
Thermistors are resistive devices and do not have polarity. Connect one lead to the input terminal of
the desired input and the second lead to a common terminal. Quest recommends using shielded and
stranded cable for all analog sensors. Connect the shield of the cable to chassis ground on the MP2x.
Cut the drain wire and isolate the shield at the sensor end of the cable.
3.3.2 Voltage Sensors
®
The TELSEC MP2x can read and scale any linear voltage input from 0 to 6 VDC.
must be externally powered.
number for the Low and High Custom scale factors.
Rev 2.1 10/21/21
Not polarity sensitive
Quest "Bullet Style" probe
Figure 2 - Thermistor Temperature Sensor Wiring
Contact Quest for the Input Scaling spread sheet to determine the correct
Typical of all Quest thermistor
temperature sensors
- 4 -
The MP2x does not provide
Sensors requiring power
©
TELSEC MP2X User Guide