Siemens S7-300 - Special Features When Wiring SM 326; DI 8 X NAMUR for Hazardous Areas

Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
109
8.4.2 Special Features when Wiring SM 326; DI 8 x NAMUR for Hazardous Areas
Cable guide for SM 326; DI 8 x NAMUR in Hazardous Area
Observe the following note when operating the SM 326; DI 8 x NAMUR in the potentially
explosive area:
Note
The L+/M supply line terminals at the digital input module SM 326; DI 8 x NAMUR must be
protected using a cable guide in order to conform to specified air gaps and creepage
distances for operation in potentially explosive atmospheres.
Cable guide
Order number: 6ES7393-4AA10-0AA0; 5 units
1 2 3
44
① Cable guide for screw-type terminals
② Auxiliary wedge for cage-clamp terminals
③ Cable guide for cage-clamp terminals
④ Separating lines (breaking points):
separate the three sections at these points
Figure 8-26 Cable guide for SM 326; DI 8 x NAMUR