Before any other connection is made, the protective ground terminal shall be connected to a protective conductor. Any interruption of the protective conductor inside or outside the ap- paratus or disconnection of the protective ground terminal is likely to make the apparatus dangerous.
Provision must be made within the mains supply line for switching off the apparatus at all poles. The switch-off facility can also be used for a group of instruments, if the facility used can accommodate the required current and voltage carrying capacity.
No particular polarity need be observed when connecting a 24 V UC power supply.
When selecting the lead material as well as when installing measurement and output signal lines the stipulations enshrined in DIN VDE 0100 must be observed. We recommend the use of single-wire copper conductors or flexible copper conductors with gas-tight crimped, tin- plated connector sleeves. Fixed cabling is necessary for all connecting cables.
For explosion-protected designs please observe in addition DIN VDE 0165/2.91.
Before connecting the signal lines, check, while referring to the following sections þCompu- tation Programsþ which input and output variables are to be connected to which terminals. See Connection Diagrams in chapter 8.
19" Plug-In Card
Route the signal and power supply lines to the appropriate spring-contact strip and connect (Fig. 19-1 and Fig. 19-2). The terminals have been designed either as a solder connection,
in wire-wrap technology (1 mm x 1 mm) or as maxi-termipoint connection (2.4 mm x 0.8 mm).
For 19" plug-in card in explosion-protected design, additionally provide connectors for lin- king safety barriers and plug-in card (Fig. 19-3 and Fig. 19-4).
Field Case 1. Having undone the two cross-head screws, remove the terminal cover.
2. Route the signal and power supply lines through the cable glands (8 x PG 11, 1 x PG 13.5) a n d c o n n e c t t o t h e t e r m i n a l s ( u p t o m a x . 2 . 5 m m 2 f o r w i r e s ) ( F i g . 1 9 - 5 a n d F i g . 1 9 - 6 ) .
For field housing in explosion-protected design, route the cables to the intrinsically safe in- puts via the blue cable glands (Fig. 19-7).
Control panel case
The signal and power supply lines are to be connected with the terminals on the back of the c a s e ( s o l i d c o n d u c t o r s 2 , 5 m m 2 ; c o n n e c t o r s l e e v e s 1 , 5 m m 2 m a x . ) ( F i g . 1 9 - 5 ) .
All device versions
The FSK sockets „FSK1...4“ as well as the socket for the RS-232C interface are situated on the front panel, each featuring a screwable cover (Fig. 16-1).
Communication with intelligent transmitters is only possible with non explosion-protected versions.