K-Patents PR-33-AC - Manual (Page 8)

2 PR-33-AC instruction manual
Document/Revision No. Rev. 1.02 Effective: June, 2014
2 Instrument connections
The instrument has three different connections: power supply (+24 Vdc), 4 – 20 mA cur-
rent output, and an Ethernet connection for digital data acquisition and configuration.
These connections are grouped into two connectors so that one of the connectors car-
ries both the power supply and the current output. The other connector is an Ethernet
connection.
Both connections use the industrial M12 connector. The Ethernet connector has the
industry standard M12-Ethernet pin-out. The power supply and current output use an
A-coded M12 male on the instrument side. The Ethernet connection uses a D-coded
female connector on the instrument side.
For the wiring details, please see figure 3.3.
2.1 Power supply
The Sanitary OEM Refractometer requires a 24 V DC power supply (allowable tolerance
is ±10 %). The current consumption of the refractometer is less than 100 mA. The power
supply should be shielded from external voltage surges.
2.2 mA output
The mA output of the refractometer supplies voltage and it is galvanically isolated. The
compliance (maximum resistive load) for the output is 1000
Ω
.
2.3 Ethernet connection
The Ethernet connection enables data download from a Sanitary OEM Refractometer
to a computer. Any type of computer (PC, Mac, PDA, mainframe...) with a compatible
network connection can be configured to view and download data from the refrac-
tometer. The Sanitary OEM Refractometer can be configured and monitored without
any special software by using a standard web browser. Chapter 9 gives all the specifi-
cations necessary to write a data acquisition program.