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The AUF is a universal display unit usable in all 4-20 mA transmission circuits. Sandwiched directly between a standard DIN 43650 (Hirschmann style) plug and socket assembly, the AUF is the easiest of displays to install. The AUF is fully scalable through two control buttons. Programming capabilities include scaling, decimal point location, damping and, for units with a switch, setpoint value. Power is provided to the AUF directly via the 4–20 mA loop, so no additional power supply is required. The programming information resides inside the AUF’s EEPROM memory, making the unit immune to power failures up to ten years in duration (time enough to put your kids through college). Small, easily installed… the AUF is the ideal way to get more from your transmitter. Now you can have your signal, and see it too.
Technical Details
Display: 4-stellige, digit red LED display,
digit height: 7.62 mm
programmable decimal point setting
Indicating range: -1999...9999
Accuracy: 0.2% of span ±1 digit
Electrical connection: to transmitters with 4-20 mA
output and plug acc. DIN 43 650,
polarized
Sensor supply: not required, loop-powered
24 VDC ±20% (only AUF-4000)
Voltage drop: ≤ 5 V (acc. to max. load 250 Ω)
Conversion rate: 3 measurements/second
Gate time: 0,3- 20 s (adjustable)
Data back-up: non-volatile EEPROM
Error message: HI: overrange
LO: underflow
Programming: with two keys, menu-assisted,
scaling of indication, decimal point,
gate time, error message switch point
(AUF-1001)
Protection: IP 65
Temperature
infl uence on display: 0,1% / 10 K
Storage temperature: -30 ... +80 °C
Technical Data AUF-1.../AUF-3...
Max. current load: max. 60 mA
Case material: plastic PA6 GF30, orange
window: PMMA red
Ambient temperature: 0 ... +60 °C
Open Collector: model AUF-1001, PNP,
max. current load 90 mA
Technical Data AUF-2000
Conformance: DMT 99 ATEX E 077
Ex-protection: 
II 2G EEx ib IIC T4
Voltage: Ui 28 VDC
Current: Ii 100 mA
Power: Pi 0,9 W
Effective inner capacitance Ci negligible
Effective inner inductance Li negligible
Housing material: polyamide compound, black
window: PMMA, red
Ambient temperature -20 ... +40 °C
Technical Data AUF-4000
(option for DIN plug connector connection, can only be
calibrated with factory-mounted sensor)
Display: 4-segment red LED
Temperature range: -20 to +80°C
Power supply: 24 VDC ±20%
Input: Pulses of DTK
(NPN-Hall effect sensor)
Output: 4-20 mA, 3-wire
Load: 250 Ω
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