Standards and certifications
Panel PC 2100 user's manual V1.17
311
The entity concept allows interconnection of nonincendive devices with connected devices with not specifically
inspected combinations as a system. For this, the permissible values of V
oc
(or U
o
) and I
sc
(or I
o
) for the connected
device must be less than or equal to V
max
(U
i
) and I
max
(I
i
) for the nonincendive device, and the permissible values
of C
a
(C
o
) and L
a
(L
o
) for the connected device must be greater than or equal to C
i
+ C
Cable
and L
i
+ L
Cable
for the
nonincendive device with field wiring.
The nonincendive device with field wiring must satisfy 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 277: 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 performed 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 accepting one or more Division 2 wiring methods.
Warning!
•
Replacing components may impair eligibility for Division 2 hazardous (classified) locations.
•
The device is not permitted to be switched on or off if the area is known to represent an explo-
sion hazard.
•
The nonincendive device with field wiring is not permitted to be connected via a parallel con-
nection. This applies unless the device has received express approval for this.
This B&R device is suitable for use in Class I, Division 2, Groups A, B, C and D. In addition, it offers nonincendive
field wiring for devices in Class I, Division 2, Groups A, B, C and D.