IE-SNC-T43(4)11-02
3
Instruction Manual for use of transducer:
T4311 (RS232)
T4411 (RS485)
Transducer is designed for temperature measurement by means of the external temperature
probe with RTD Pt1000 sensor. It is built in a plastic case with the IP65 protection. Read this
manual before first transducer connection. Transducer T4311 communicates via link RS232,
transducer T4411 via link RS485. Supported communication protocols are Modbus RTU and
protocol compatible with standard Advantech-ADAM. Measured value is displayed on dual line
LCD display. Display can be also switched OFF. Output link RS485 of transducer T4411 is
galvanic isolated
. Output link RS232 of transducer T4311 is
NOT
galvanic isolated. Setting of all
transducer parameters is enabled in accordance with procedure described in chapter „
Setting of
transducer, selection of communication protocol
“ or by means of commands of selected
communication protocol. For detailed description of features of protocols see chapter „
Description
of communication protocols
“.
Setting of transducer from the manufacturer
If special setting was not required in the order, transducer is set from the manufacturer to the
following parameters:
communication protocol:
Modbus RTU
address of transducer:
01H
communication speed:
9600Bd, no parity, 2 stop bits
display:
switched ON
Installation of the transducer
Transducer is designed for wall mounting. There are two mounting holes at the sides of the
case. Interconnection terminals are accessible after unscrewing four screws and removing the lid.
Lace the cable through a gland at the case wall. Connect the cable to terminals with respecting the
signal polarity (see figure). Terminals are self-clamping and can be opened by a suitable
screwdriver. For the opening, insert the screwdriver to upper terminal hole and lever by him. Do not
remember to tighten glands and case lid with inserted packing after cables connecting. It is
necessary for warranting of protection IP65.
Working position is negligible.
Transducer T4311 is supplied with connection cable equipped with connector for connection to
RS232 interface. For T4411 transducer (RS485) it is recommended to use shielded twisted copper
cable (e.g. SYKFY ) with outside diameter of the cable must be from 3 to 6.5 mm, maximal length
1200m. The cable must be located at indoor rooms.
Nominal cable impedance should be 100
Ω
, loop resistance max. 240
Ω
, cable capacity max.
65 pF/m. Suitable cable is e.g. SYKFY 2x2x0,5 mm
2
, where one wire pair serves for transducer
powering and second pair for communication link.
The cable should be led in one line, i.e. NOT to „tree“ or „star“. At the end termination
resistor should be located. For short distance other topology is allowed. Terminate the network by a
termination resistor. The value of the resistor is recommended about 120
Ω
. For short distance
termination resistor can be left out.