Siemens Simatic MP 377 Operating Instructions Manual page 21

Operating conditions for Zones 2 and 22
The following operating conditions apply for Zones 2 and 22:
● The HMI device must be installed in a control cabinet. The control cabinet must meet the
● The ambient temperature range is 0 °C ≤ T ≤ 50 °C. Under these conditions, the HMI
● In situations where the temperature on the cable at the cable inlet of the control cabinet
● Put measures in place to ensure the rated voltage is not exceeded.
● Protect the HMI device from mechanical loads > 7 J and the display from mechanical
● Ensure that the atmosphere is not explosive during servicing.
● If the HMI device was dismantled, check the mounting seal for damage before
● Turn off the HMI device and the entire electrical installation in the control cabinet, if the
MP 377 15" Touch daylight readable (WinCC flexible)
Operating Instructions (Compact), 04/2009, A5E02532357-01
following in accordance with EN 60529:
– Protection type IP54 or higher for Zone 2
– Protection type IP5x or higher for Zone 22 in case of non conductive dust
– Protection type IP6x or higher for Zone 22 in case of conductive dust
You must install the HMI device so that you provide at least protection type IP54 or IP5x
to EN 60529 on the front of the device. Consult the operating instructions of control
cabinet and HMI device for this purpose.
Make allowances for the operating and ambient conditions under which you operate the
HMI device. A manufacturer's declaration must be provided for the control cabinet in
accordance with EC Directive 94/9, stating it is fit for purpose.
device will satisfy temperature class Tx for category 3G and support a maximum surface
temperature of xx °C for category 3D. (x ... Temperature value, see design examination
certificate).
Refer to the operating instructions for details of limitations resulting from the ambient
temperature range.
exceeds a temperature of 70 °C, or where the temperature on the wire branching point
exceeds 80 °C under operating conditions, the temperature specifications of the cables
must match the actually measured temperatures.
Any transient interference voltages above the rated value must not exceed 40 %.
loads > 4 J.
Measures that impair or remove the protection type of the HMI device are not permitted
while the system is in operation.
reassembling the HMI device. A damaged, porous or used mounting seal no longer
meets the requirements of the protection type. In this case, the mounting seal must be
replaced.
film on the front of the HMI device or the glass of the display on the HMI device are
damaged by a tear or hole or if the front film starts to peel off.
Exchange the HMI device. Restart the system again after the device has been
exchanged.
Safety instructions and approvals
2.4 Notes about Usage
21