ProTechTPS Total Protection System
Manual 26710V1
32
Woodward
Control Wiring Guidelines
Electrical Connections
EXPLOSION HAZARD—Do not connect or disconnect while circuit is
live unless area is known to be non-hazardous.
Plug-in screw-type terminal blocks are used to connect field wiring to each
ProTechTPS module & to the trip (interposing) relay contacts.
The size of the field wiring to the ProTech system should be between 1.5 and 6
mm² (16 and 10 AWG) for power supply wiring and between 0.3 and 4 mm² (22
and 12 AWG) for all other I/O wiring. Wires for the all the pluggable I/O terminal
blocks should be stripped at 8 mm (0.3 inch). Torque and screwdriver
requirements are listed below.
The screw lug terminal blocks are designed to flatten stranded wire.
Do not tin (solder) the wire’s strands that terminate at the ProTech
Terminal Blocks. If the wire strands are soldered together, the solder
will cold flow and shrink over time causing the connection to become
intermittent or disconnected.
Woodward recommends the following for ProTechTPS:
Stranded bare copper wire (unless gaseous Sulfur
compounds are present) at the wire ends.
Stranded copper wire with individually tin plated strands at
the wire ends.
Hollow ferrules at the wire ends.
Use single wire per terminal. There are enough terminals
provided for all I/O wiring.
Torque range for screws of
Screw Connection Terminal
Blocks: 0.22–0.25 N•m (1.95–
2.21 lb-in).
Screwdriver blade:
0.4 X 2.5 mm (0.016 X 0.10
inch)
Screwdriver available as
Woodward PN 8992-005
Figure 2-6. Screw Connection Terminal Block
