The 991-06-70-01-05 991 Thrust Transmitter is intended primarily for the original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, or fans who prefer to provide a simple 4 to 20 mA proportional axial displacement (thrust) signal as the input to their machinery control system.
The 991-06-70-01-05 transmitter is a 2-wire, loop-powered device that accepts input from our 3300 NSv proximity probe and its matching extension cable (available in 5 m and 7 m system length options). The transmitter conditions the signal into appropriate engineering units proportional to the shaft’s axial position, and provides it as a 4 to 20 mA industry-standard signal for input to the control system where machinery protection alarming and logic occurs.
The 991-06-70-01-05 991 transmitter provides the following notable features:
-Integrated Proximitor Sensor requires no external unit
-Non-isolated "PROX OUT " and "COM" terminals plus a coaxial connector provide a dynamic vibration and gap voltage signal output for diagnostics3.
-Non-interacting zero and span potentiometers under the Transmitter label supports loop adjustment.
-Test Input pin allows quick verification of loop signal output, using a variable DC voltage source as the input.
-A Power-up Inhibit circuit eliminates signal errors due to line voltage transients.
-A Not OK/Signal Defeat circuit prevents high outputs or false alarms due to a faulty proximity probe or loose connection.
-Choice of DIN-rail clips or bulkhead mounting screws as standard options simplifies mounting.
-Potted construction for high humidity (up to 100% condensing) environments.
-Compatibility with 3300 NSv proximity probe allows transducer installation in small areas with minimal
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Parameter
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Specification
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Input
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Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.
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Power
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Requires +12 to +35 Vdc input at the transmitter terminal.
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Signal Output
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4 to 20 mAdc over specified full-scale range in 2-wire configuration.
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Loop Accuracy
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Within ±1.5% over specified full-scale range (typical). Rated from TEST signal input to voltage across a 250 Ω loop resistance.
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Maximum Loop Resistance
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1,000 Ω including cable at 35 Vdc.
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Current Limiting
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23 mA typical.
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sales7@amikon.cn 
86-18965423501 
86-18965423501
AMKPLC 
