WIKA T91.20 - Manual

09/2006 GB
WIKA Alexander Wiegand GmbH & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Phone (+49) 93 72/132-0
Fax (+49) 93 72/132-406
E-Mail [email protected]
www.wika.de
Analogue Temperature Transmitters
Model T91.10 / T91.20
Model T91.10 Model T91.20
!
0..10V +24V GND 1 2 3 4 5 6 J
J
-
+
-
+
230 VAC
24 VDC
Load
(PLC, PC)
Pt100
C_104.01
Zero Span
Operating Instructions
1. Safety instructions
When mounting, commissioning and operating these
transmitters, it is important to observe the respective
national safety precautions and regulations in effect
(e.g. VDE 100). Nonobservance of the applicable
regulations may cause severe injury to persons or damage to
equipment. Only staff with suitable qualifications should work with
these transmitters. Before commissioning, check the instrument's
suitability for the intended application. In particular, it is important
to observe the ambient and operating limits as specified in the
WIKA data sheet, TE 91.01.
2. Mounting
Model T91.10 head mounting transmitters are designed to be
mounted on a measuring insert in a DIN Form B connection head.
Model T91.20 head mounting transmitters are designed to be
mounted on a measuring insert in a Form J connection head. The
connecting wires of the measuring insert must be approx. 50 mm
long and insulated.
3. Maintenance
The temperature transmitters described here are maintenance
free! The electronics do not incorporate any components which
could be repaired or replaced. Depending upon operating
conditions, it may be advisable to check the calibration of the
transmitter yearly.
4. Electrical connections
These transmitters have an internal galvanic connection between
the sensor input and analogue output. No external connection
should be made (for example, by earthing) between the
connected temperature sensor and analogue output! For this
reason it is best to use isolated thermocouples. For flying leads
we recommend using crimped connector sleeves.
To connect a thermocouple: Make sure that the thermocouple is
connected with the correct polarity. If the cable between the
thermocouple and the transmitter must be extended, only use the
appropriate thermal or compensating cable for the connected
thermocouple type.
4.1 Pt100 input
Model T91.10.104
Pt100 in 2- or 3-wire connection.
For a 2-wire connection the resistance of the wires affects the
measurement results. Therefore this circuit should only be
selected if the wires are short, or accuracy requirements are low.
If using a 2-wire connection, always connect a jumper between
input terminals 5 and 6.
Transmitter output signal: 0 ... 10 V / 3-wire design
Model T91.10.424
Pt100 in 2-wire connection
Transmitter output signal: 0 ... 10 V / 3-wire design
0..10V +24V GND 1 2 3 4 5 J
J
-
+
-
+
230 VAC
24 VDC
Load
(PLC, PC)
Pt100
C_424.01
Zero Span
Model T91.20.143
Pt100 in 2-wire connection
Transmitter output signal: 4 ... 20 mA / 2-wire design
Span Zero
-
-
+
+
C_143.01
230 VAC
24 VDC
Load
(PLC, PC)
Pt100
Loop
Technical alteration rights reserved.