2
1.5 Mounting instructions
1. Remove the mounting clip from the device.
2. Insert the device from the front into the panel cut-out,
ensuring the front-panel gasket is correctly seated.
3. Slide the fixing clip from the rear onto the housing,
until the spring clamps are under tension and the
upper and lower latching lugs have snapped into
place.
Note: In case of proper installation, IP65 can be
reached on the front side.
1.6 Electrical Installation
The device must be disconnected from any
power supply prior to any installation or main-
tenance work. Make sure that no more volt-
ages LIABLE TO CAUSE AN ELECTROCU-
TION are present.
Signal lines carrying voltages exceeding 30V
AC or 70V DC must be operated with a
device allowing disconnecting them from the
voltage source. This device must be located
close to the equipment and marked as its dis-
connecting device – excepted when it can be
excluded that a defect presents a danger.
Installation or maintenance work must only be
carried out by qualified personnel and in com-
pliance with the applicable national and inter-
national standards.
Take care to separate all extra-low voltages
entering or exiting the device from hazardous
electrical conductors by means of a double or
reinforced insulation (SELV circuits).
The device must be protected externally for
its proper operation. Information about the
prescribed fuses can be found in the technical
information.
• During installation, make sure that the signal inputs
are fed from the same mains phase, in order not to
exceed the maximum permitted voltage of 250V.
• The cables must be designed for the planned temper-
ature and voltage ranges. Regarding the type of the
cables, adhere to the applicable standards of the
country and of the plant. The cross sections allowed
for the screw terminals can be found in the technical
data.
• Before starting the device, check the cables for proper
wiring and tightening. The screws of unused screw
terminals must be screwed to the stop, so that they
cannot loosen and get lost.
• The device has been designed for overvoltage catego-
ry II. If higher transient voltages cannot be excluded,
additional protection measures must be taken in order
to limit the overvoltage to the values of CAT II.
1.7 Advice on noise immunity
All connections are protected against external sources
of interference. The installation location should be cho-
sen so that inductive or capacitive interference does not
affect the device or its connecting lines! Interference
(e.g. from switch-mode power supplies, motors, clocked
controllers or contactors) can be reduced by means of
appropriate cable routing and wiring.
1.8 Measures to be taken:
• Use only shielded cable and control lines. Connect
shield at both ends. The conductor cross-section of
the cables should be a minimum of 0.14 mm.
• The shield connection to the equipotential bonding
should be as short as possible and with a contact
area as large as possible (low-impedance).
• Only connect the shields to the control panel, if the
latter is also earthed.
• Install the device as far away as possible from noise-
containing cables.
• Avoid routing signal or control cables parallel to power
lines
DC versions:
Use shielded wires for the counting and control inputs
so as to obtain the maximum EMC resistance or con-
nect not used count inputs to ground (0 V).
AC versions:
Use shielded wires for the counting and control inputs
so as to obtain the maximum EMC resistance.
1.9 Cleaning and maintenance
The front side of the unit should only be cleaned using
a soft damp (water!) cloth. Cleaning of the embedded
rear side is not planned and is the responsibility of the
service personnel or of the installer.
In normal operation, this device is maintenance-free.
Should the device nevertheless not operate properly, it
must be sent back to the manufacturer or to the suppli-
er. Opening and repairing the device by the user is not
allowed and can adversely affect the original protection
level.
1.10 Operation
Is the device set and programmed correctly (function;
for counters, max. counting frequency)?
!
Danger
!
Danger