Siemens LOGO! CMR2040 Operating Instructions Manual page 19

– A key compatible with the OpenVPN client (pre-shared key)
The OpenVPN client in the Open VPN partner must support the following functions:
– OpenVPN V2.3.11 or higher
You can export the information of the Open VPN server of the CMR as a file for the client,
see section OpenVPN-PSK (Page 98).
● DynDNS
To use DynDNS, apart from the requirements listed above (SIM card, data contract,
mobile wireless network) you also require the following:
– A suitable service provider
– A public IP address
– Note the section "Time of day" below.
● HTTPS
– For HTTPS via mobile wireless you require a public IP address for the CMR.
– Note the section "Time of day" below.
● Time of day
When you use certificates, for example when you use HTTPS, e-mail (secure) or
DynDNS, you require the precise time of day and the precise date for checking the
certificates.
Antennas
Only use antennas from the accessories program for the CMR. For more information, refer to
the section Antennas (Page 155).
● Mobile wireless
To operate the CMR, you require an antenna that is adapted to the standard of the
mobile wireless network you are using.
For the fallback behavior when using an LTE network, refer to section Application and
communications functions (Page 13).
You will find the frequency bands supported by the CMR in the section Technical
specifications (Page 141).
● GPS
If you want to use GPS, you require a suitable GPS antenna, see section Antennas
(Page 155).
Power supply
You require a voltage source with a voltage between 12 VDC and 24 VDC that provides
adequate voltage or current. For more information, refer to the section Technical
specifications (Page 141).
LOGO! CMR2020, LOGO! CMR2040
Operating Instructions, 10/2016, C79000-G8976-C356-03
The key can be generated in the WBM of the CMR or generated by the
communications partner and imported via the WBM of the CMR.
Application and functions
1.3 Requirements for use
19