Hans Turck BL20-ECO, Инструкция по эксплуатации

Страница: 37 / 53

35
2020/09
When using a digital input module for 120/230 V AC, it should be ensured that a potential group is
created in conjunction with the Power Feeding module BL20-PF-120/230VAC-D.
7.2.4 C-rail (cross connection)
The C-rail runs through all base modules. The C-rail of the base modules for power distribution mod -
ules is mechanically separated; thus potentially isolating the adjoining supply groups.
Access to the C-rail is possible with the help of base modules with a C in their designation (for exam
-
ple, BL20-S4T-SBCS). The corresponding connection level is indicated on these modules by a thick
black line. The black line is continuous on all I/O modules. On power distribution modules, the black
line is only above the connection 24. This makes clear that the C-rail is separated from the adjoining
potential group to its left.
NOTICE
Common potential of 24 VDC and 230 VAC field supply
Destruction of electronic
† Make sure that the 24 VDC and 230 VAC modules belong to separate potential groups.
Abb. 2: C-rail (front view)
Abb. 3: C-rail front (side view)
WARNUNG
Incorrect C-rail load of 230 V
Possible danger to life due to electric shock
† Ensure that the C-rail is loaded with a maximum of 24 V DC, not 230 V.