UniStream
™
Unitronics
7
Wiring
▪
This equipment is designed to operate only at SELV/PELV/Class 2/Limited Power
environments.
▪
All power supplies in the system must include double insulation. Power supply
outputs must be rated as SELV/PELV/Class 2/Limited Power.
▪
Do not connect either the ‘Neutral’
or ‘Line’ signal of the 110/220VAC to device’s 0V
point.
▪
Do not touch live wires.
▪
All wiring activities should be performed while power is OFF.
▪
Use over-current protection, such as a fuse or circuit breaker, to avoid excessive
currents into the HMI Panel supply port.
▪
Unused points should not be connected (unless otherwise specified). Ignoring this
directive may damage the device.
▪
Double-check all wiring before turning on the power supply.
Caution
▪
To avoid damaging the wire, use a maximum torque of 0.5 N·m (4.4 in-lb).
▪
Do not use tin, solder, or any substance on stripped wire that might cause the
wire strand to break.
▪
Install at maximum distance from high-voltage cables and power equipment.
Wiring Procedure
Use crimp terminals for wiring; use 26-12 AWG wire (0.13 mm
2
–
3.31 mm
2
).
1. Strip the wire to a length of 7±0.5mm (0.250
–
0.300 inches).
2. Unscrew the terminal to its widest position before inserting a wire.
3. Insert the wire completely into the terminal to ensure a proper connection.
4. Tighten enough to keep the wire from pulling free.
Wiring Guidelines
In order to ensure that the device will operate properly and to avoid electromagnetic
interference:
▪
Use a metal cabinet. Make sure the cabinet and its doors are properly earthed.
▪
Use wires that are properly sized for the load.
▪
Individually connect each 0V point in the system to the power supply 0V terminal.
▪
Individually connect each functional ground point ( ) to the earth of the system
(preferably to the metal cabinet chassis).
Use the shortest and thickest wires possible: less than 1m (3.3’) in length, minimum
thickness 14 AWG (2 mm
2
).
▪
Connect the power supply 0V to the earth of the system.
N
OTE
For detailed information, refer to the document System Wiring Guidelines,
located in the Technical Library in the Unitronics’ website.
