Commissioning Of Ncs; Prerequisites / Default Settings; B.2.4 Commissioning Of Ncs - Siemens SIPART PS2 Operating Instructions Manual

External position detection with NCS or external position detection system
B.2 Non-Contacting Sensor
Procedure
The NCS sensor is equipped with a shielded four-pole cable. Wire this cable to the positioner
as follows:
1. Feed the four-pole NCS cable
type of cable gland depends on the positioner version.
2. Tighten the cable gland
3. Terminate the four-pole NCS cable
diagram.
4. Place the cable clamp
5. Use the screw
terminal of the positioner.
6. Grounding:
The rear steel panel of the NCS sensor is inevitably bonded to the ground potential of the
system when mounting on the console. This ground connection is only functional if there
is a low-impedance connection to ground potential of the system. Ensure this state by
measuring the ground resistance. If necessary, ensure proper grounding by means of an
additional cable from the NCS sensor to ground potential.
B.2.4

Commissioning of NCS

B.2.4.1

Prerequisites / default settings

1. Supply electrical and pneumatic auxiliary power to the SIPART PS2 positioner. The top
row of the display shows the current sensor voltage (0 to 100%), while the "NOINI" info
flashes in the bottom row. The pneumatic actuator does not move.
2. If the SIPART PS2 positioner has already been initialized, carry out a reset. Carry out the
reset of parameter group "Init" in the '50.PRST' Preset (Page 164) parameter.
3. Preset for part-turn actuators:
While the valve or flaps are closed, align the North pole of the magnet with the cable; "N"
in position
glass fiber reinforced polyester (left graphic) or anodized aluminum (right graphic)
(Page 262)".
4. Linear actuators with a stroke range up to 14 mm do not need to be preset.
5. Preset for linear actuators with a stroke range > 14 mm (0.55 inch):
The magnet for the assembly kit for linear actuators > 14 mm (0.55 inch) is fixed. The factory
default alignment of the magnet is permanent.
6. Monitor the display of the positioner while adjusting the actuator to its mechanical stops by
means of
range from P2.0 to P98.0.
Note
This condition cannot be met with slipping flaps or linear actuators that exceed the
mechanical actuation limits.
270
⑩
⑨
.
⑦
onto the outer insulation of the four-pole NCS cable
⑧
to bond the cable shielding lug
⑦
in "Figure B-4 Mounting on part-turn actuator with magnet holder made of
and at the positioner. Verify that the displayed values never exceed the
through the union nut and the cable gland. Note: The
⑩
in the positioner in accordance with the wiring
⑫
and the cable clamp
Operating Instructions, 05/2017, A5E00074631-AC
⑩
.
⑦
to the ground
SIPART PS2 with and without HART