schmersal bp408, Installation Manual

Page: 83 / 122

Installation manual of system “bp408” - Commissioning 83
Regularly check the functioning and smooth use of UPS. The instructions of
the device manufacturer must be followed.
10. Insulation and short circuit measurement:
1) An attenuation filter is installed in all control systems. The attenuation
filter can get destroyed during insulation measurement. Before carrying
out insulation measurement in the safety circuit, the control fuse must
be removed.
2) For all control systems in which a UPS is installed, this UPS must be
completely disconnected before the insulation or short-circuit
measurement and the connections must be bridged in the control
system accordingly.
3) Follow the usual safety regulations during insulation measurements.
There is danger for man and machine.
11. All relays and contactors installed in the control systems must be suppressed
(see section 7.2).
12. The motor circuit-breakers, excess current release, RCD circuit breaker, etc.
installed in the control systems are supplied by default and must be checked
during commissioning and, if necessary, adapted to the connected equipment.
13. The neutral conductor of the power supply of the safety circuit must be
connected to terminal 9 of bp408; the neutral conductor of the main contactors
must be connected to terminal 14 of bp408.
14. According to VDE regulations, the ground line (V DC) must be connected to
the protective conductor (PE) of the mains supply.
 The terminal (100) (ground) is connected to the terminal PE (protective
conductor) in the control system. As a result, there is no floating network
and an earth fault of the signal voltage (+24 V DC) is detected
immediately.
 Transformers are grounded on one side on the secondary side (e.g.
special voltages of the brake or the valves). As a result, there is no
floating network and an earth fault of the secondary voltage is detected
immediately.
15. The safety circuit with the monitoring unit in bp408 is protected with max. 1 A
(in exceptional cases with a maximum of 2 A).
16. The impulse diagram for the control system must be observed. The impulses
listed there are not drawn to scale. It is a schematic representation.
17. The arrangement of the cut-off points in the levelling area (levelling zone) must
be strictly adhered to.