937A Multi-Sensor System
A.11
The sensor cable is connected to the Controller with the 9-pin "D" connector
as shown above. This connector is equipped with integral strain relief. Screw
the strain reliefs into the mating standoffs on the rear of the Controller for
good contact and to avoid excess stress on the connectors.
Making a 315 Pirani cable
The Series 315 Pirani Sensor is connected to the module with a
multiconductor shielded cable. It has a standard round octal socket on one
end with an integrated polarizing tab. If excess stress is applied to the cable,
use separate strain relief to prevent damage to the sensor, cable or the
Controller. Cables are available in standard lengths of 10, 25, 50, and 100 feet
and in custom lengths up to 500 feet.
The series 345 Pirani Sensor is connected to the controller using the same
cable as the Series 317 Convection Pirani. Refer to Connecting the Series
317 Sensor on page A.14 for information about this cable.
Some applications may require the use of special cables, such as when the
connection must be routed through restrictive barriers or through a conduit.
Custom cables may be fabricated for these situations using the information
provided in the figure. The maximum length of the sensor cable is 500 feet.
Use a "D" connector with integral strain relief for all applications.
9-pin,"D" connector on Pirani sensor
module
Pin
Description
1,6
bridge drive, +
5,9
bridge drive, -
2
chassis ground
3
4
signal -
7
bridge sensor leg
8
bridge reference leg
