ROTRONIC HC2 - Manual (Page 9)

E-M-HC2-accessories_24
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Accessories and Parts
for probes, indicators and transmitters Instruction Manual
Document Type
Page 9 of 23
Document title
© 2009-2010; Rotronic AG E-M-HC2-accessories_23
5.4 RS-485 and Modbus adapters
Order Code Description
E2-01XX-MOD
Female connector (black) for HC2 probes with
1 m (3.2 ft) cable (4 wires with tinned ends):
Powers the HC2 probe and allows connecting
the probe to either a RS-485 network or a
Modbus network, depending on the
communication protocol used by the probe
See note below
E2-02XX-MOD Same as E2-01XX-MOD with 2m (6.5 ft) cable
E2-05XX-MOD Same as E2-01XX-MOD with 5m (16.4 ft) cable
Specifications
Supply voltage to adapter 5.0…28 VDC
Supply voltage to probe 3.3 VDC
Current consumption (includes HC2 probe) 10 mA typical
RS-485 specifications Baud rate : 19200
Parity : none
Data bits : 8
Stop bits : 1
Wire color Name Function
Green VDD (+) Power supply +
Grey GND Power and digital signal
Red RXD RS-485 bi-directional TX+ / RX +
Blue TXD RS-485 bi-directional TX- / RX -
NOTE: The electronic circuit of the adapter generates a small amount of heat. For this reason, do not place
the adapter directly under the probe. Depending on the application, using a passive cable to separate the
adapter and the HC2-S or HC2-S3 probe is recommended to prevent heat transfer from the adapter to the
probe and obtain the best measurement accuracy.