CHAPTER 4: ELECTRICS 4-19
ALPHA 552
4.2. Connections
4.2.1. Power supply
Voltage: 3 x 220-480 V, 50 / 60 Hz + Ground (± 10%)
Maximum voltage: 3 x 220 V = 6 A
3 x 480 V = 3 A
Before connecting, check to make sure that the voltage of the barfeed system corresponds
to the one provided by the lathe. The voltage of the barfeed system is indicated on the
identification plate.
a) Transformer T1
b) Hydraulic pump motor
The LNS barfeed systems are equipped with their own thermal protection systems (breakers, thermal
relays and fuses, etc.). The power supply for the barfeed system should be connected to the output of a
breaker mounted in the electrical control box of the lathe (10 A max.).
For the wiring inside the lathe, the section of the cables should be at least 1.5 mm
2
(AWG 16).
4.2.2. Signals from the lathe to the barfeed system
Always refer to the electrical diagrams shipped with the barfeed system and placed in the electrical
cabinet.
• All wires for interface connections are numbered
• All barfeed systems are equipped with a power supply of +24 Vdc.
a) 24 V dc power supply
Corresponds to the +24 V of the barfeed system. This power shall be used to connect the signals from
the lathe to the PLC.
• All signals from the lathe to the PLC shall be powered by the +24 V dc of the barfeed system.
• All signals from the barfeed system to the lathe shall be powered by the +24 V dc of the lathe.
For the other types of connections, please contact LNS S.A., or their local representative.
b) "EMERGENCY STOP" signal of lathe XT8-XT9
This signal is part of a safety link (Emergency Stop circuit) of the barfeed system. XT8-XT9 corresponds
to the Emergency Stop signal of the lathe. If the circuit is open, the barfeed system will go into an
Emergency Stop mode.
When the lathe is in an Emergency Stop mode, or if the safety line of the barfeed system is interrupted,
an alarm will go off and the R1 relay of the barfeed system will be triggered (see description of the R1
relay, below).
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