Unitronics USL-050-B05 Installation Manual page 10

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 power supply connection point.
 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.
C
aution  To avoid damaging the wire, use a maximum torque of 0.5 N·m (5 kgf·cm).
 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
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.
 Individually connect each functional ground point (
(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
 Connect the power supply 0V to the earth of the system.
 Earthing the cables' shield:
Connect the cable shield to the earth of the system (preferably to the metal

cabinet chassis). Note that the shield must be connected only at one end of the
cable; it is recommended to earth the shield at the Display-side.
Keep shield connections as short as possible.

Ensure shield continuity when extending shielded cables.

10
2 ).
UniStream
2 –3.31 mm
) to the earth of the system
® Display
2 )
Unitronics