Cable Connections; Connection To Earth Ground - YASKAWA EcoTrim ET-1024 System Manual

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EcoTrim ET-1024 System
3.6

3.6.1 Connection to Earth Ground

3 Installation

3.6 Cable Connections

Cable Connections
After the EcoTrim ET-1024 System components and peripherals are
secured in their correct locations, unwrap the cables from around the
equipment and route them according to the cable diagrams included in the
documentation supplied with your EcoTrim ET-1024 System. All cables
and connectors are labeled for ease of installation.
A small gap exists between the bottom of the work-cell
safety fence and the robot/positioner common base. This
NOTE
gap provides a passage for cables that run between
components outside the work cell and those inside the work
cell.
Do not use the EcoTrim ET-1024 System unless specified components
are connected to a low-resistance earth ground. Do not connect the
earth ground wire with the wires for the electric power source. The low-
resistance earth ground must be a "dedicated" ground that is a direct
connection between the component and the earth ground point.
Operator injury or death, as well as equipment damage, can result from
an inadequate or defective earth ground system.
Each robot and DX200 controller must be connected to an earth ground. If
a ground stake is used, it should be driven at least 2.43 m (8 ft) into the
soil. The soil surrounding the driven ground stake should be treated with a
chemical that increases the soil conductivity in the vicinity of the driven
ground stake. This is often referred to as a "low-resistance earth ground"
and may require quite a bit more than a single driven ground rod,
depending on soil conditions. Multiple ground stakes (bonded together) or
even a bonded network of buried copper sheeting (plus conduction-
enhancing chemicals) may be required, depending on local soil condition.
In any event, the "low-resistance earth ground" must indicate a resistance
of 100 ohms or less (when measured directly between grounded
equipment and the earth ground system). Be advised that specialized
measuring equipment is usually required to get an accurate "resistance-
to-ground" reading. Consult a specialist in this field, if required.
The customer must supply all wires associated with the
earth ground. The customer is responsible for establishing
NOTE
and maintaining an adequate earth ground (must maintain a
resistance of 100 ohms or less).
Connect robot and DX200 controller to the earth ground as follows:
1. Connect one end of an earth ground wire to the lug marked Earth
Ground on the connector panel of MH24 robot. Connect the other end
of the earth ground wire to the low-resistance earth ground.
2. Connect one end of an earth ground wire to the Common Ground Bus
Bar located inside DX200 controller. Connect the other end of the
earth ground wire to the low-resistance earth ground.
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WARNING
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