rotork Pakscan IIS, Техническое руководство

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Pakscan IIS Technical Manual Issue 1.0
Publication S130E 19
J13 - Plant power monitor disable
This link should never be fitted to the master station. It determines the method of power monitoring of the
system.
J14 - Plant power external supply option
This link must always be fitted as the main circuits always use the primary on board power module fitted just
above the terminals.
J15 - Flash memory
Flash memory is not normally used in this unit. This link,
in conjunction with J2 can be used to provide support
for flash memory if it is fitted to the board.
LK1, LK2 and LK3
These links are not used in the Pakscan IIS system and should not be fitted.
LK4 and LK5 - Screen to earth connections
In order to comply with directive 89/336/EEC of the
European Community it is necessary to use a screened
cable for the 2 wire loop and to connect the master
station to earth through a suitable bonding conductor. The cable must have BOTH the screen connections
terminated at the master station, to terminals 19 and 22 as indicated. These connections are then decoupled to
earth through suitable capacitors fitted to the Pakscan IIS itself.
It is also desirable to bond the screen to a suitable ground to reduce the system susceptibility to noise. This
bonding can be achieved either by using the Pakscan IIS ground connection and fitting LK4, or by connecting
the screen to a suitable external earth. Even if an external earth connection is used it is still required to connect
the screen to the Pakscan IIS terminals in order that the cables from the unit are correctly decoupled.
Memory J2 J15
Flash C B
Standard see J2 settings no
Signal Earthing LK4 LK5
Using IIS yes no
External ground no no
20
21
22
Port B IN
Port B OUT
SAFETY EARTH
17
18
19
Port A OUT
Port A IN
Cable A
Cable B
LK4
LK5
Fig. 7: Screens to master station earth
20
21
22
Port B IN
Port B OUT
SAFETY EARTH
17
18
19
Port A OUT
Port A IN
Cable A
Cable B
LK4
LK5
Earth Bar
Fig. 8: Screens to earth bar