Wiring Requirements
WARNING Do not disconnect modules or wires unless the power supply has been switched off or the area is known to be
The devices may only be connected to the supply voltage shown on the type plate.
The devices are designed for operation with a safety
WARNING Substitution of components may impair suitability for Class I, Division 2 and Zone 2.
These devices must be supplied by a SELV source as defined in the Low Voltage Directive 73/23/EEC and 93/68/EEC.
WARNING This equipment has been evaluated as EEx nC IIC T4 equipment under DEMKO Certificate No.
03 ATEX 0324537U. Each module is marked 
II 3G and is suitable for use in Zone 2 Explosive Atmospheres. The device must be installed in a minimum IP 54 enclosure as defined in IEC 60529 and EN 60529.
ATTENTION This unit is a
ATTENTION
Safety First!
Be sure to disconnect the power cord before installing and/or wiring your MOXA EtherDevice Switch.
Calculate the maximum possible current in each power wire and common wire. Observe all electrical codes dictating the maximum current allowable for each wire size.
If the current goes above the maximum ratings, the wiring could overheat, causing serious damage to your equipment.
You should also pay attention to the following items:
!Use separate paths to route wiring for power and devices. If power wiring and device wiring paths must cross, make sure the wires are perpendicular at the intersection point.
!NOTE: Do not run signal or communications wiring and power wiring in the same wire conduit. To avoid interference, wires with different signal characteristics should be routed separately.
!You can use the type of signal transmitted through a wire to determine which wires should be kept separate. The rule of thumb is that wiring that shares similar electrical characteristics can be bundled together.
!Keep input wiring and output wiring separated.
!It is strongly advised that you label wiring to all devices in the system when necessary.
—7 —