12
Caution!
High Voltage
An Internal fuse will prevent damage for over voltage condition,
however it isn‟t guaranteed the internal electronic components are not
damaged.
DC sources should provide proper isolation from main AC power.
Caution!
Emergency
Stop
A hard-wired Emergency Stop should be fitted in any system using
the EOP4-057 to comply with the ICS Safety Recommendations.
Caution!
Supply Voltage
Condition
Do not power the EOP4-057 and inductive loads, or input circuitry to
the controller, with the same power supply.
Note: The 24V DC output from some controllers may not have
enough current to power the EOP4-057.
Caution!
Wire Routing
Wire lengths of DC power should be minimized (Maximum 500m
(shielded), 300m (unshielded twisted pairs)).
Twisted pairs are recommended for use.
If the wiring is to be exposed to lightning or surges, take appropriate
lightning protection measures.
Keep dynamical power far away from communication cable.
Equip ungrounded DC 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 1 MΩ and 4700pF.
Connection
For power cables, please select cables with their dielectric strength
values and current values in compliance with the safety
specifications. Power terminals are packed inside the packaging box.
Connect positive DC line to the „+24V‟ terminal and the DC ground to
the „0V‟ terminal.
2.2.2 Grounding Requirements
Chassis ground must be used
. DC ground is not directly coupled to earth ground
internally. It is preferable not to ground DC negative return to chassis ground as poor
site earths can introduce noise into a system, but if necessary an earth connection
should be made, from the power supply return point to the star earth point, ground
conductors should be as short and as large in cross-sectional area as possible, the
conductors should be able to carry the maximum short circuit current. Ground
conductors should be connected to a star earth point. This ensures that no ground
conductor carries current from any other branch.
2.2.3 CE Requirements
To make the EOP4-057 series comply with EMC directives, and to reduce susceptibility to
electrical interference, a separate #14 AWG ground wire should be taken to the chassis ground
terminal of the power connector. This ground connection should be run directly to the star earth
connection point.
2.2.4 Safety Guidelines
This section presents recommended installation practices and procedures. Since no two applications