User Manual

9
Quick Start Guides
The power conditioning circuitry inside the unit
is accomplished by a switching power supply. The
peak starting current can be as high as 2A.
Fusing Requirements
If the display does not come on within 5 seconds
of power up, switch off the power. An internal
fuse will prevent damage if the polarity of the
d.c. power is incorrect. Check wiring to insure
proper connections and try to power up again.
High Voltage
An Internal fuse will prevent damage for over
voltage condition however it is not guaranteed.
D.c. voltage sources should provide proper
isolation from main a.c. power and similar
hazards.
Emergency Stop
A Hard-wired EMERGENCY STOP should be tted
in any system using a UNIPLAY to comply with ICS
Safety Recommendations.
Supply Voltage Condition
Do not power the U N I P L AY and inductive d.c.
loads, or input circuitry to the controller, with
the same power supply.
The 24 Vd.c. output from some
controllers may not have enough current
to power the U N I PL AY.
Wire Routing
Wire lengths should be minimized (Maximum
length: 500m shielded, 300m unshielded).
Wires should be run in pairs with a neutral or
common paired with a signal line.
If wiring is to be exposed to lightning or surges,
use appropriate surge suppression devices.
Keep a.c., high energy, and rapidly switching d.c.
wiring separate from the 3 signal wires.
Fit ungrounded d.c. supplies with a resistor
and capacitor in parallel to earth ground. This
provides a path for static and high frequency
dissipation. Typical values to use are 1MΩ and
47 0 0 p F.
To prevent the U NIPL AY from becoming
damaged or having noise output issues,
after turning the device off, please wait
10 seconds before turning the device on
again.
Connection
To make a connection, strip
about 10mm of insulation
off the end of the wire,
turn the connector screw
counterclockwise until the
gap is wide open, insert
the wire all the way in, and
turn the screw clockwise
until tight. Connect positive d.c. line to the +24V
terminal and the d.c. ground to the 0V terminal.
GROUNDING REQUIREMENTS
0
A CHASSIS GROUND MUST BE USED.
The d.c. ground is not directly coupled to Earth
ground internally. It is not advisable to ground
the d.c. negative return to chassis ground as poor
site earthing can introduce noise into a system,
but if necessary an earth connection should be
made, from the power supply return point to
GND +24v