Allen-Bradley 1719 Ex I/O User Manual page 14

Chapter 1 Safety
14
Do not mount the device at locations where an aggressive atmosphere may
be present.
Do not mount a damaged or polluted device.
The device is designed for use in pollution degree 2 and overvoltage category II
according to IEC/EN 60664-1.
If the device has already been operated in general electrical installations, the
device may subsequently no longer be installed in electrical installations used in
combination with hazardous areas.
If circuits with type of protection Ex i are operated with non-intrinsically safe
circuits, they must no longer be used as circuits with type of protection Ex i.
Avoid electrostatic charges, which could result in electrostatic discharges while
installing or operating the device.
Observe the installation instructions according to IEC/EN 60079-14.
Intrinsically safe circuits of associated apparatus (installed in non-hazardous area)
can be led into hazardous areas. Observe the compliance of the separation
distances to all nonintrinsically safe circuits according to IEC/EN 60079-14.
The respective peak values of the field device and the associated apparatus with
regard to explosion protection should be considered when connecting
intrinsically safe field devices with intrinsically safe circuits of associated
apparatus (verification of intrinsic safety). Make sure to observe
IEC/EN 60079-14 and IEC/EN 60079-25.
Do not push the I/O modules, adapters, and power supplies into the slots with
too much force. The rear connections of the devices may be damaged if using
excessive force. In this case, the explosion protection can no longer be ensured.
The backplane connections are non-intrinsically safe.
Connection or disconnection of energized non-intrinsically safe circuits is only
permitted in the absence of a potentially explosive atmosphere.
The device must be disconnected from the power supply prior to installation and
maintenance. The power supply may be activated only after all the circuits
required for operation have been fully assembled and connected.
All non-intrinsically safe interfaces must only be connected to secure low
protective voltages (SELV/PELV), the maximum root mean square (Um) of
which must not exceed 60V DC for the power supply connections and 30V AC/
DC for the bus connection. The distributed I/O station must only be connected
to the power supply voltages as specified on the type label.
Rockwell Automation Publication 1719-UM001C-EN-E - August 2018