Standards and certifications
214
Automation PC 3100 User's manual V 1.00
Translation of the original documentation
The nonincendive device with field wiring must meet the following criteria:
B&R device (connected device)
-
Connected, nonincendive device with field wiring (mouse, keyboard)
V
oc
≤
V
max
I
sc
≤
I
max
C
a
≥
C
i
+ C
Cable
L
a
≥
L
i
+ L
Cable
Table 222: Connected, nonincendive device with field wiring
If the electrical parameters of the cable are unknown, the following values can be used:
Where C
Cable
= 196.85 pF/m (60 pF/ft) if unknown
Where L
Cable
= 0.656 μH/m (0.20 μH/ft) if unknown
Wiring must be carried out in accordance with national regulations and the requirements of the authorities.
The B&R device must be installed in a suitable protective housing. For installations in Class I, Division 2 hazardous
locations, the housing must be capable of withstanding one or more Division 2 wiring methods.
Warning!
•
Replacing components may impair the suitability of the Division 2 hazardous location (classi-
fied) under certain circumstances.
•
As long as the area is knowingly at risk of explosion, the device is not permitted to be switched
on or off.
•
The nonincendive device with field wiring is not permitted to be connected via a parallel con-
nection. This is valid unless the device has received express permission for this.
The B&R device is suitable for use in Class I, Division 2, Groups A, B, C, and D areas. It also provides nonincendive
field wiring for devices in Class I, Division 2, Groups A, B, C and D.
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