Figure 12: Supply Principle Ex I; Table 24: Legend For Figure "Ex I Power Supply Concept - WAGO 750-439 Manual

40 Connect Devices
The Ex i I/O module (750-439) receives the 24 V voltage supply potential and the
0V potential for the field level from an upstream Ex i I/O module or from an Ex i
power supply module via the power contacts designed as blade contacts.
The Ex i I/O module (750-439) provides these potentials to subsequent I/O
modules via the power contacts designed as spring contacts.

Figure 12: Supply Principle Ex i

Table 24: Legend for Figure "Ex i Power Supply Concept"

No. Explanation
1 Fieldbus coupler/controller
2 Ex i supply module (750-606, 750-625/000-001)
3 Ex i I/O modules
4 End module
U System supply (24 VDC)
S
U Field supply (24 VDC)
F1
U Field supply 2 (24 VDC)
F2
*)
750-606 with electronic fuse and diagnostics
750-625/000-001 with electronic fuse, no diagnostics
Manual
Version 1.3.0, valid from HW Version 03, SW Version 03
WAGO-I/O-SYSTEM 750
750-439 8DI NAMUR Ex i
*)