Siemens SIMATIC ET 200SP HA Originalbetriebsanleitung Seite 16

Ex-DQ 2x23.1VDC/20mA
Specific conditions of use
CAUTION
Specific conditions of use
1. This equipment shall be installed in an enclosure with an ingress
protection of at least IP54 in accordance with EN 60079-0 and EN 60529.
The installation shall also ensure Pollution Degree 2 (as defined in EN
60664-1) inside the enclosure. All circuits shall be limited to Overvoltage
category I or II. These requirements apply even when installed in a non-
hazardous area.
2. The earth connection of the mounting rail shall be connected to the local
potential equalization system per applicable installation standard.
3. Transient protection shall be provided that is set at a level not exceeding
140 % of the peak rated voltage value at all supply terminals to the
equipment, or at most set at 119 V.
Maintenance
For use in the USA and Canada
16
The Ex-I/O modules are maintenance-free.
In general, pulling or plugging modules is not allowed in
Zone 2. Before starting work, make sure that there is no
explosive atmosphere or that the power supply is
switched off.
For repairs, you must send the I/O module to the
manufacturing location. The repair may only be carried
out there.
The control drawing for the ET 200SP HA and the ET
200SP is supplied with the respective power supply
module.
The latest edition can also be found at
URL: (https://support.industry.siemens.com/cs/ww/en/)
Ex-DQ 2x23.1VDC/20mA
A5E50377641-AB, 03/2023