1756-OF4 Output Wrong? Check Mode, RTB, and Scaling First
A field-first diagnostic sequence for 1756-OF4 analog output problems: channel mode, removable terminal block, scaling, and controlled electrical checks.
Manufacturer: Bently Nevada
Product No.: 330780-91-CN
Country of origin:United States
Product Type: 3300 XL 11 mm Proximitor Sensor
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 180g
Dimensions: 50 mm x 100 mm x 100 mm (H x W x D)
Shipping port: Xiamen
Warranty: 12 months
330780-91-CN specifies the 9.0 m DIN-rail mount configuration of the 3300 XL 11 mm Proximitor Sensor, equipped with the China hazardous area approval package. This sensor performs non-contacting eddy-current displacement measurement within 3300 XL 11 mm monitoring chains, outputting an analog voltage directly proportional to the distance between the probe tip and the observed target surface.
This variant pairs with 3300 XL 11 mm probes and extension cables to monitor shaft vibration, axial position, and rotor dynamics. Unlike the 5.0 m options or panel-mount configurations, this model is factory-calibrated for a 9.0 m system length and integrates DIN-rail mounting hardware. Additionally, the -CN suffix designates NEPSI and CCC certifications required for localized hazardous area compliance in the Chinese market.
| Option / Segment | Code on This SKU | Meaning from Datasheet |
|---|---|---|
| Orderable Part Number | 330780-91-CN | 3300 XL 11 mm Proximitor Sensor with 9.0 m system length, DIN-rail mounting, and China approvals |
| A: Total Length and Mounting Option | 91 | 9.0 meters (29.5 feet) system length, DIN-rail mount |
| Suffix | -CN | China hazardous area approval package (NEPSI + CCC + applicable markings) |
| Manufacturer | Bently Nevada |
| Part Number / SKU | 330780-91-CN |
| System Type | 3300 XL 11 mm Proximity Transducer System |
| Sensor Input Compatibility | Accepts one 3300 XL 11 mm proximity probe and extension cable |
| Power Input Requirements | -17.5 Vdc to -26 Vdc (without barriers) at 12 mA maximum consumption; -23 Vdc to -26 Vdc (with barriers) |
| Analog Output Resistance | 50 ohms |
| Incremental Scale Factor (ISF) | 3.94 V/mm (100 mV/mil) +/- 10% typical |
| Linear Range | 4.0 mm (160 mils), beginning at approximately 0.5 mm (20 mils) from target |
| Recommended Gap Setting | 2.5 mm (100 mils) |
| Frequency Response | 0 to 8 kHz (+0, -3 dB typical) |
| Housing Material | A380 aluminum |
| Connector Material | Gold-plated brass ClickLoc |
| Operating Temperature | -52 degC to +100 degC |
| Relative Humidity Limit | 100% condensing (non-submersible with protected connectors) |
| Terminal Label | Terminal Connection Function |
|---|---|
| VT | Voltage Transmitter / Power Supply (-24 Vdc nominal input) |
| COM | Common Ground Reference |
| OUT | Transducer Analog Output Signal |
Ensure that the Proximitor sensor is mounted on a 35 mm DIN rail in a dry, clean industrial enclosure providing a minimum of IP54 protection. Maintain appropriate clearance for field wiring and terminal connections. Use three-conductor shielded triad cable (0.2 to 1.5 mm2 or 16 to 24 AWG) for connections between the Proximitor sensor and the monitoring system. Verify that the sum of the probe length and extension cable length matches the 9.0 m system calibration length of the sensor.
The 330780-91-CN transmitter meets the following compliance requirements:
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| Color pattern |
Blue
|
| Country of origin |
United States
|