en
35
8 Expansion Port
The expansion port is a multi-functional interface for connecting external sensors and
alarm systems.
ATTENTION!
Possible damage to the devices!
The interface carries active signals. Use caution during wiring and
observe the specied limit values. Sputnik Engineering is unable to accept
liability for defects or malfunctions of MaxWeb xp or connected devices
resulting from improper wiring or the failure to observe limit values.
8�1 Connection options
The expansion port has the following connection options:
Input for an irradiance sensor with 4…20 mA current loop
Input for a temperature sensor with 4…20 mA current loop
Two inputs for switching contacts for external alarm sensors.
A potential-free status signalling contact, e.g. for reporting malfunctions to a higher-
level operations control system or via a visual display.
6 Inputs for connecting the wireless control receiver (option MaxRemote)
8�2 Irradiance and temperature sensor
Please note the following when connecting sensors for irradiance und/or temperature
measurement to the expansion port:
The distance between the sensor and MaxWeb xp should not exceed 50 m. For larger
distances the auxiliary MaxMeteo module is required.
The sensors can be supplied via the integrated 15 VDC / 0.5 A power supply at the
expansion port, if required.
The precision of the measuring inputs is approx. +/- 5% of the full-scale value (mea-
sured at 20 mA). Add up the measurement errors for the sensor in order to determine
the overall accuracy.
Only sensors with a 4…20 mA linear measuring signal are suitable for the measuring
inputs (e.g. irradiance 4 mA = 0 W/m
2
… 20 mA = 1,200 W/m
2
).
To Next Page
Loading...