Product Overview
The Wilcoxon PC420A-DA series offers dual output, loop-powered acceleration sensors with dynamic vibration output. These sensors are designed for 24/7 monitoring of overall machine vibration, enabling continuous trending and alerting users to changing machine conditions to guide maintenance efforts. They easily integrate into existing PLC, DCS, or SCADA systems. Users can choose between peak equivalent, true RMS, or true peak output to best fit their industrial requirements. The 4-20 mA output is proportional to acceleration vibration, and the dynamic output signal, derived from an internal buffered amplifier, requires 4-20 mA loop power.
Product Attributes
- Brand: Wilcoxon Sensing Technologies (An Amphenol Company)
- Certifications: ISO 9001 approved facility
- Sensing Element Design: PZT ceramic / shear
- Case Material: 316L stainless steel
- Sealing: Hermetic
- Output Connector: 3 pin, MIL-C-5015 style
- Mating Connector: R6G type
- Recommended Cabling: J9T3A (3-conductor shielded, yellow Teflon jacket)
- Accessories Supplied: SF6 mounting stud; calibration data (level 2)
Technical Specifications
| Specification | Value | Details |
|---|---|---|
| Product Series | PC420A-DA Dual Output Series | Acceleration loop powered sensors with dynamic vibration output |
| Model Selection Guide | PC420x-yy-DA | |
| Output Type (x) | R, P, TP | R = RMS output, P = calculated peak output, TP = true peak output |
| Full Scale (yy) | 05, 10, 20 | 05 = 5 g (49 m/sec), 10 = 10 g (98 m/sec), 20 = 20 g (196 m/sec) |
| Dynamic Output (DA) | Acceleration | 100 mV/g |
| 4-20 mA Output | Full Scale: 20 mA, 5% | Proportional to acceleration vibration |
| Dynamic Output Sensitivity | 10% | 100 mV/g |
| Dynamic Output Full Scale | 20 g | |
| Frequency Response (4-20 mA) | 10% 3 dB | 10 Hz - 1.0 kHz |
| Frequency Response (4-20 mA) | 3 dB | 4.0 Hz - 2.0 kHz |
| Frequency Response (Dynamic Output) | 3 dB | 2.5 Hz - 10 kHz |
| Repeatability | 2% | |
| Transverse Sensitivity (max) | 5% | |
| Amplitude Nonlinearity (max) | 1% | |
| Resonant Frequency (mounted, nominal) | 25 kHz | |
| Power Requirements (2-wire loop power) | 12 - 30 VDC | Voltage at sensor terminals |
| Loop Resistance (max) at 24 VDC | 700 | |
| Turn on Time (4-20 mA loop) | < 30 sec | |
| Dynamic Output Bias Voltage | +3.3 VDC (re: connector pin B) | |
| Dynamic Output Noise (equiv. g) | 2.5 Hz - 10 kHz | 2 mg |
| Grounding | Case isolated, internally shielded | |
| Temperature Range | 40 to +85C | |
| Vibration Limit | 250 g peak | |
| Shock Limit | 2,500 g peak | |
| Weight | 162 grams | |
| Mounting | 1/4-28 tapped hole | |
| Dimensions | 1.12" dia. x 2.12" | (excluding connector) |
| Connector Pin A | Loop positive (+) | |
| Connector Pin B | Loop negative (), dynamic common | |
| Connector Pin C | Dynamic output | |
| Connector Pin SHD | Ground shell | |
| Loop Resistance Calculation | RL = (DC supply voltage - 10 V) / 20 mA | |
| Minimum RL Wattage | Determined by: (0.0004 x RL) | |
| Loop Resistance & Wattage Requirements | 12 VDC | RL (max): 100 , RL (min wattage): 1/8 watt |
| Loop Resistance & Wattage Requirements | 20 VDC | RL (max): 500 , RL (min wattage): 1/4 watt |
| Loop Resistance & Wattage Requirements | 24 VDC | RL (max): 700 , RL (min wattage): 1/2 watt |
| Loop Resistance & Wattage Requirements | 26 VDC | RL (max): 800 , RL (min wattage): 1/2 watt |
| Loop Resistance & Wattage Requirements | 30 VDC | RL (max): 1,000 , RL (min wattage): 1/2 watt |
2412111044_Amphenol-PC420VR-20-DA_C3319136.pdf
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