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Greyline 2000 Series Operator Workstation Hardware Manual Chapter 5 - Electrical Connections
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Chapter 5 - Electrical Connections
Power Connections
Power connections are made to the rear panel of the Greyline. The following sections address the specific
connections for the standard 115 VAC, in addition to 230 VAC and 10-30 VDC.
Chassis Ground
Connect an exclusive grounding circuit to the power supply of the Greyline, at the connection marked
"EARTH." Grounding is third wire grounding with less than 100 ohms resistance.
When exclusive grounding is not possible, use a common grounding circuit (Figure B).
Make the grounding point as close to the unit as possible, keeping the ground wire as short as possible.
Logic Ground
Important!
The communication driver circuits of some Total Control devices may be
damaged if communication cables are not properly grounded! This will
require that the device be returned to Total Control for repairs. Read the
following material for grounding information.
It is important that communication cables connected to Total Control devices be properly grounded. This
is true of all types of communication (RS-232, RS-422, and RS-485).
When connecting communication cables you must connect the logic ground line from each device to the
next in the serial link.
In addition to the logic ground, it is also important to properly connect the cable shield. For increased
noise immunity, the shield should be connected to chassis ground,
not logic ground.
Refer to the diagram below.
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