Thrust Transmitter | 991-01-XX-01-00 MOD: 284318-01 | Bently Nevada
Product Condition
Original New with One Year WarrantyParts Available
In Stock and Same Day ShippingDelivery Mode
Shipping via DHL Fedex or UPS etcEmail:
sales1@amikon.cnWhatsapp/Mob:
+86 18150117685Technical Specifications
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 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).
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Manufacturer |
Bently Nevada |
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Article number |
991-01-XX-01-00 MOD: 284318-01 |
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Type |
Thrust Transmitter |
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Dimension |
10x7.3x6cm |
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Weight |
0.46kg |
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Full-scale Option |
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System Length Option |
5.0 meters (16.4 feet) or 7.0 meters (23.0 feet) |
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Mounting Option |
35 mm DIN-rail clips |
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Agency Approval Option |
Not required |
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Operating Temperature |
-35°C to +85°C (-31°F to +185°F) |
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Storage Temperature |
-52°C to +100°C (-62°F to +212°F). |
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Input |
Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable |
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Power |
Requires +12 to +35 Vdc input at the transmitter terminal |
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Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
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Current Limiting |
23 mA typical |
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Output Impedance |
Prox Out has a 10 kΩ output impedance calibrated for a 10 MΩ load |
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Prox out linear range |
1.4 mm (55 mils). Begins at approximately 0.25 mm (10 mils) from target surface |
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Prox Out incremental scale factor |
7.87 mV/µm (200 mV/mil) ±6.5% typical including interchangeability errors when measured in increments of 0.25 mm (10 mils) over the linear range using a flat 30 mm (1.2 inch) target. Worst case 7.87 mV/µm ±10%. Typical Noise Level: 50 mV/pp |
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4 to 20 mA loop accuracy |
Within ±1.5% over specified fullscale range. Accuracy is rated from the TEST signal input to the voltage measured across a 250 Ω loop resistance. The ±1.5% error is in addition to the Prox Out Incremental Scale Factor |
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4 to 20 mA signal output |
4 to 20 mAdc over specified fullscale range in 2-wire configuration |
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Zero and span |
Non-interacting external adjustments |
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NOT OK/signal defeat |
Signal output will go to less than 3.6 mA within 100 µs after a Not OK condition occurs. Signal output is restored within 2-3 seconds after the Not OK condition is removed |
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 diagnostics
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.
Choice of DIN-rail clips or bulkhead mounting screws as standard options simplifies mounting
Environmental and Installation Physical Limitations
Target Surface Size Limitation: The diameter of the thrust target at the shaft end must be greater than or equal to 15 mm. If the target is too small, the magnetic lines of force cannot converge completely, leading to a reduction in the measurement range or nonlinear distortion.
Side Interference Immunity (Counterbore Limitation): If the probe is installed inside a counterbore, the counterbore diameter must be greater than 13 mm. If the surrounding metal is too close to the side of the probe (less than this distance), the probe may mistakenly identify the side housing as the measurement target.
Technical FAQ
Q: What is the output signal of the 991-01-XX-01-00 MOD:284318-01 transmitter?
A: It provides a standard 4–20 mA DC current signal.
Q: Does the 991-01-XX-01-00 MOD:284318-01 require an external power supply?
A: No separate supply is needed. It is a 2-wire loop-powered device with a supply range of +12 to +35 Vdc.
Q: What is the maximum load resistance for the 991-01-XX-01-00 MOD:284318-01 transmitter?
A: At 35 Vdc supply, the maximum loop resistance is up to 1,000 Ω.
Q: How does the 991-01-XX-01-00 MOD:284318-01 behave during a fault condition?
A: It includes a Not OK (fault detection) circuit. If the probe fails or disconnects, the output current drops below 3.6 mA within 100 μs to prevent false alarms.
Q: Are your products brand new?
A: Yes. We only supply 100% original and brand-new products. All items are sourced through authorized channels and have never been used or refurbished.
Q: Why can customers buy with confidence?
A: Because every product is backed by our 1-Year Warranty Guarantee of Quality, ensuring reliability, customer satisfaction, and long-term support after delivery.
Q: Do you provide international shipping?
A: Yes. We ship products to customers worldwide using reliable international logistics services such as EMS, DHL, UPS, and FedEx.
Trusted by 5,000+ plants worldwide | Contact for more Bently Nevada spares: sales1@amikon.cn
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