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 prioritization. With a choice of peak equivalent, true RMS, or true peak output, they integrate easily into existing process control systems like PLCs, DCS, or SCADA. The 4-20 mA output is proportional to acceleration vibration, and the dynamic signal output, derived from an internal buffered amplifier, requires loop power. Manufactured in an approved ISO 9001 facility, these sensors are suitable for industrial applications requiring in-depth vibration analysis.
Product Attributes
- Brand: Wilcoxon Sensing Technologies
- Company: An Amphenol Company
- Origin: USA
- Certifications: ISO 9001 approved facility
- Material: 316L stainless steel (Case)
- Sealing: Hermetic
- Sensing Element: PZT ceramic / shear
- Output Connector: 3 pin, MIL-C-5015 style
- Mating Connector: R6G type
- Recommended Cabling: J9T3A (3-conductor shielded, yellow Teflon jacket)
Technical Specifications
| Specification | Value |
|---|---|
| Model Series | PC420A-DA |
| Output Type | Dual output, loop powered acceleration sensors with dynamic vibration output |
| 4-20 mA Output Full Scale | 20 mA, 5% |
| Dynamic Output Sensitivity | 100 mV/g, 10% |
| Dynamic Output Full Scale | 20 g |
| Frequency Response (4-20 mA) | 10 Hz - 1.0 kHz ( 10% 3 dB); 4.0 Hz - 2.0 kHz ( 10% 3 dB) |
| Frequency Response (Dynamic Output) | 2.5 Hz - 10 kHz ( 3 dB) |
| 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 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 |
| Shield Connection | Ground shell |
| Accessories Supplied | SF6 mounting stud; calibration data (level 2) |
Model Selection Guide (PC420Ax-yy-DA)
| Model Suffix | Description |
|---|---|
| x (4-20 mA output type) | R = RMS output, P = calculated peak output, TP = true peak output |
| yy (4-20 mA full scale) | 05 = 5 g (49 m/sec), 10 = 10 g (98 m/sec), 20 = 20 g (196 m/sec) |
| DA | Dynamic output, acceleration, 100 mV/g |
Loop Resistance Calculation
| DC Supply Voltage | RL (max resistance) | RL (minimum wattage capability) |
|---|---|---|
| 12 VDC | 100 | 1/8 watt |
| 20 VDC | 500 | 1/4 watt |
| 24 VDC | 700 | 1/2 watt |
| 26 VDC | 800 | 1/2 watt |
| 30 VDC | 1,000 | 1/2 watt |
Note: Maximum loop resistance (RL) can be calculated by: RL = (DC supply voltage - 10 V) / 20 mA. Lower resistance is allowed, greater than 10 recommended. Minimum RL wattage determined by: (0.0004 x RL).
2412111044_Amphenol-PC420AR-05-DA_C3319165.pdf
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