03217917-01-01E By DEK Technical Reference Manual Vol 1_enPDFA.pdf - 第32页
3 SAFETY FEATURES 3.4 HIGH VOLTAGE PROTECTION 32 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 Printer Protected Earth Stud and Earth Busbar - Earth Point and Labels (RHS of Printer Chassis) OFF ON L1 L2 T1 T2 1 3 2 …
3 SAFETY FEATURES
3.4 HIGH VOLTAGE PROTECTION
TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 31
3.4 HIGH VOLTAGE PROTECTION
3.4.1 Access
Where incoming supply voltages are present, protection is afforded by controlling access to the en-
closures that house the supply. The printer is fitted with a mains isolator switch that cuts power to
all circuits located beyond the switch.
3.4.2 Hazard Warning Labels
Hazard warning labels are placed on the outside of enclosures where dangerous voltage
(100V-240V) terminations are present within.
3.4.3 Earth Bonding
All external metal surfaces are mechanically and electrically bonded to the printer’s protected earth
point. The bonding wire used is identified by its green and yellow insulation and is commonly used
to earth bond throughout. Care should be taken when removing these links that when they are re-
placed they are secured tightly and cleanly.
L
L
L1
T1
L2
T2
N
N
E
E
1
2
6
3
3
4
5
Printer Protected Earth Point
1 PSU M37 Module Earth Bond
Stud
4 Printer Protective Earth Chassis
Stud
2 Earth Busbar 5 Earth Busbar Connected to
Printer Frame
3 Printer Bonding Earth Chassis
Stud
6 Printer Earth Connections
3 SAFETY FEATURES
3.4 HIGH VOLTAGE PROTECTION
32 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
Printer Protected Earth Stud and Earth Busbar - Earth Point and Labels (RHS of Printer
Chassis)
OFF
ON
L1 L2
T1 T2
1
3
2
Mains Isolator (Cover Removed) Showing Earth Loom Arrangement
1 Earth Label 3 Earth Lead to Chassis M5 Stud
and TB3
2 Earth Lead to Chassis M6 Stud
(Protective Earth)
3 SAFETY FEATURES
3.4 HIGH VOLTAGE PROTECTION
TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 33
1
1
Earth Studs and Labels on the Print Carriage
1 Earth Studs and Labels
1
Earth Studs and Labels on the Vacuum Pump
1 Earth Studs and Labels