Cumberland 074-11772, Owner'S Manual

Page: 32 / 102

Chapter 3: Basic connections
WARNING
If the ground wiring was not done correctly, thunderstorms can destroy the EDGE
Bin Scale
NOTICE
When tightening the Earth terminal blocks inside the EDGE Bin Scale, use a torque
from 7.9lbf*in (0.9N*m) to 8.9lbf*in (1.0 N*m) to fasten a wire gauge from 14AWG
(diameter of 1.62mm or cross sectional area of 2.08mm
2 ) to 16AWG (diameter of
1.29mm or cross sectional area of 1.30mm 2 ).
WARNING
If metal rigid tubes are used, ensure they are correctly grounded.
WARNING
Installation must only be performed by qualified service personnel.
Wiring Connections
The power and communications wires between the EDGE Controller and the Bin Scale 3 Wires LC must
be connected so they can relay information.
WARNING
Disconnect power before servicing.
Wiring guidelines
• Bin scale module must be closed of a 3/6–slot; see table below for appropriate wire size.
• The entire communications network must not exceed the length listed for the wire gage to work
properly.
• The shield wire for the power and connection wires must be connected to EARTH at one end of the
cable.
• It is recommended to use different pathways for the Automation & Safety cables.
• First twisted pair (blue & white) must be used for A and B wires and a second twisted pair (black &
red) must be used for 24V and GND.
Table 3-1 Power Cable Options (24V and GND)
Distance Minimum wire gage Minimum diameter Minimum cross section
150 m (500 ft) 18 AWG 1.02 mm 0.82 mm 2
300 m (1000 ft) 16 AWG* 1.29 mm 1.30 mm 2
600 m (2000 ft) 14 AWG
1.62 mm 2.08 mm 2
900 m (3000 ft) 12 AWG 2.05 mm 3.30 mm 2
1200 m (4000 ft) 10 AWG
2.58 mm 5.26 mm 2
* Recommended
32 891–00577 EDGE Bin Scale 3 Wires LC