ROTRONIC MP400H - Manual (Page 12)

E-M-HM-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroMet MP Humidity Temperature
Meteorological Probe: User Guide Instruction Manual
Document Type
Page 12 of 19
Document title
© 2009; Rotronic AG E-M-HM-V1_10
6.4 Electrical diagram
Electrical diagram for voltage outputs
The maximum permissible cable length can be
determined under consideration of the voltage drop
caused by the current flowing to the devices
connected to the unit. The voltage drop in the cable
depends both on cable resistance and on the
equivalent resistance of the devices connected in
parallel to the unit. The total resistance connected to
each unit output should be at least 1000 ohms.
Cable resistance should not be more than 1/1000 of
the load resistance.
Electrical diagram for current outputs
The maximum permissible cable length, connecting
the unit to other devices, is determined by the total
resistance resulting from the addition of the cable
resistance and that of the devices connected in series
with the unit. This resistance should not exceed 500
ohms.