Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
2 – 197
Volume 2 3 Electrical Installation
2
Figure 3-7 Connection box with conduits
Explosion hazard!
Before turning on the line voltage, carefully close the housing with
the housing cover. Screw the housing cover completely onto the
housing and pull it tight using a torque of 25Nm (reference value.
The fuses for the power supply unit may only be replaced by fuses
having the same rating.
Electrical rating: See chapter "1.5 Technical Data", page 2–130.
The fuse for the isolating repeater may not be replaced. If this fuse
fails, the entire electronics has to be checked by the manufacturer.
Before closing, make sure that the thread turns are clean and
greased with OKS 217.
For information on the terminal assignment of the remaining termi-
nals, please refer to section "3.2 Terminals".
The current output of the isolating repeater cannot be switched
over between active and passive. The table on page 2–199 shows
which type of isolating repeater is used in your device.
Mains feed cable
Intrinsically safe 4–20 mA
current output signal
Cable length 20 m
Fuse for isolating repeater
Fuses
for power supply
Equipotential bonding busbar
provided by customer
Equipotential bonding
Ex i isolating repeater
Wire 1 (+)
Wire 2 ()
Wire 3 (S) Screen
(only for version LB 49x-11)
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