Meinberg SyncBox PTPv2 - Manual (Page 26)

Power supply
The variant DHS is designed for operation with a DC (18 V to 72 V, DC-insulation
1.5 kV). The voltage feed is done through 3 pol DFK connector in the front panel of
the clock and should have low resistance to minimize spurious emission (EMI).
The type AHS with an AC (100 V to 240 V, 47 Hz to 63 Hz) and also DC (100 V
to 240 V DC) power supply. The special model DAHS provides 3 pol DFK connector
in the front panel instead of power cord receptacle. Both includes a fuse T500 mA
which is available inside the housing.
To avoid potential differences between the signal ground of AHS/DHS and a post-
connected unit installed on different DIN rails, the signal ground of the clock is
insulated from the case.
The case must be grounded by using the rear contact!
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