Switch inside of the EH20-P-H unknown what it does.
Other, Pelco Cameras, Pelco Transmission & Power
This POE selection switch will enable or disable heaters. Here is the temperature spec for each mode.
HPOE: -30C to 55C
POE+: -10C to 55C
The EH20-P-H has two modes of POE (Power over Ethernet). This can be selected via a switch on the power module located here by Red Arrow
NOTE: A Microsemi 9601G midspan injector (PD-9601G/AC) must be use if HPOE mode is selected. It will not work properly without this injector. If POE+ mode is selected, it will disable the heaters and enable the enclosure to work on any POE+ midspan injector or Ethernet switch. One thing to keep in mind is that, this enclosure doesn’t support LLDP. The network administrator must go into the POE+ Ethernet switch and force the power to be at 30W if a managed Ethernet switch is used. Using any of the following midspan injectors that we offer will not need any configuration.
PD-9601G/AC Single-port, HPoE midspan
POE1AT-US, -EU Single-port, IEEE802.3at midspan
POE4ATN-US, -EU 4-port, IEEE802.3at midspan
POE8ATN-US, -EU 8-port, IEEE802.3at midspan
POE16ATN-US, -EU 16-port, IEEE802.3at midspan