Safety Shutdown; Bus Cable; Preparing The Bus Cables; Installing The Bus Cable - Siemens SIPART PS2 PA 6DR55 Series Operating Instructions Manual

Connect
6.1 Connect electrically
6.1.4

Safety shutdown

The positioner is equipped with an additional input (terminal 81 [+] and terminal 82 [-]) to
approach the safety position. After activating this function, this input must be continuously
supplied with +24 V in order to retain the normal control function.
If this auxiliary voltage fails or is switched, the exhaust air valve is forced-opened and the
actuator moves to the defined safety position so that the actuator cannot be moved using the
buttons on the device and the master.
Communication with the master is still possible. The coding bridge on the motherboard is
used to activate this function. It can be accessed after removing the module cover, and must
be switched from the right position (as-delivered condition) to the left position.
6.1.5

Bus cable

6.1.5.1

Preparing the bus cables

The following image will help you in preparing the bus cable for installation:
Figure 6-2
a Length in [mm]:
① Bus cable to be used:
② Cable shield
6.1.5.2

Installing the bus cable

Installing the bus cable for versions without flameproof enclosures
Devices without flameproof enclosures include:
● Normal version of devices
● Intrinsically safe versions
● Versions for zones 2 and 22
Proceed as follows to install the bus cable:
1. Strip the bus cable.
76
Preparing the bus cable
80 Normal version of the device (without Ex and Ex i)
120 Version with flameproof enclosure (Ex d)
6XV1 830-5AH10 or 6XV1 830-5BH10
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07