HBM MX1601B - Page 93

Modules and transducers
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I3031-14.0 HBM: public 93
after the digital communication (data mode). These
transducers include the force transducer U93 for ex
ample.
S Thermocouple amplifiers with RFID chips on the
transducer connector support the TEDS technology,
for example to automatically transmit the measuring
point or additional calibration data to the amplifier
after connection.
The data sheet of each amplifier includes further specific
ations with regards to TEDS, e.g. the maximum possible
cable length to the transducer. If TEDS is not used, the
possible cable length can be significantly longer.
Retrofitting TEDS in transducer connectors
The IEEE standard 1451.4 defines a generally acknow
ledged process with which sensors can be identified. The
sensor is identified by the respective data sheet which is
stored in electronic format in the sensor, cable or plug on
a 1-wire EEPROM (TEDS - Transducer Electronic Data
Sheet). The amplifier communicates with this EEPROM
via the serial 1-wire interface, reads the data sheet and
makes the corresponding amplifier settings.
The following figure shows the retrofitting of TEDS in a
plug. The bridge between Pin 4 and Pin 9 is used for plug
identification of the transducer. It starts automatic read
ing of the TEDS.
HBM recommends the TEDSmodule (1Wire
®
EEP
ROM) DS24B33 from Dallas Maxim. HBM offers a pack
age with 10 TEDS: order no. :1-TEDS-PAK