Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 33)

Publication 1746-UM614B-EN-P - September 2007
Install and Wire the Module 33
7. At the source-end of cables from mV devices:
– remove the drain wire and foil shield.
– apply shrink wrap as an option.
– connect to mV devices keeping the leads short.
Cable Preparation and Connections to Minimize Electrical Noise Interference
IMPORTANT
If noise persists, try grounding the opposite end of the cable,
instead. (Ground one end only.)
Terminal Block
Wires
9.5 mm
(3/8 in.)
Remove drain wire and
foil shield at casing.
Cables
Keep the length of
unshielded wires as
short as possible.
Limit braid length to 304.8 mm
(12 in.) or less. Solder braid to lug
attached to bottom row of I/O
chassis bolts.
9.5 mm (3/8 in.)
9.5 mm (3/8 in.)
Cables
Solder drain
wires to braid
at casings.
Keep the length of
unshielded wires as
short as possible. Signal
Wires
Connect I/O chassis bolt
to earth ground.
Ungrounded End at Source Device Grounded End at I/O Chassis