PC420-EX

Explosion Proof Vibration Transmitter

Measurement range: 5 g to 20 g (acceleration)

0.5 ips to 50 ips (velocity)

Repeatability 2 %

Frequency range (±3 dB): 4 … 2000 Hz

Temperature range: -40 … +85 °C

Features

 Acceleration or velocity output units

 True root-mean-square (RMS), equivalent

peak or true peak output

 Explosion proof certification (ATEX, CSA)

 Corrosion resistant

 ESD, overload and reverse wiring protection

Benefits

 Choice of RMS, true peak or peak output

allows you to choose the sensor that best fits

your requirements

 Provides continuous trending of overall

machine vibration

 Can help guide maintenance in prioritizing the

need for service

 Helps notify of impending equipment failure

The 4-20 mA output of this sensor series is proportional to the overall vibration. An output of 4 mA indicates

no vibration; a level of 0 ips for velocity output models; a level of 0 g for acceleration output models. A full-

scale reading of 20 mA indicates that the maximum range (RMS or peak) of vibration is present. The peak

output units provide a computed equivalent peak level of vibration based on the RMS.

Specifications

Dynamic specifications

Full scale, 20 mA ±5 %: see table 1

Frequency range: ±10 %

±3 dB

10 … 1000 Hz

4 … 2000 Hz

Repeatability: ±2 %

Transverse sensitivity, max.: 5.0 %

Electrical specifications

Supply voltage

(at sensor terminals):

14 … 30 VDC

Loop resistance

(at 24 VDC), max.:

700 

Turn on time, 4 … 20 mA loop <10 s

Grounding:

Case isolated, internally

shielded

Environmental specifications

Operating temperature range: -40 … +85 °C

Vibration limit: 250 g peak

Destruction limit: 2500 g peak

Environmental sealing: Epoxy sealed

Physical data

Sensing element design: PZT ceramic, shear

Weight: 380 grams

Case material: Stainless steel 303

Mounting: Tapped hole 3/8-24 x 3/8

Cable: Leads 18 AWG, 4 m

Explosion Proof Certification

CSA

PC420Axx-yy-EX

Class 1, Division 1,

Groups A, B, C, D

PC420Vxx-yy-EX

Class 1, Division 1, 2,

Groups A, B, C, D

ATEX

PC420Axx-yy-EX

EEx d IIC T3C

EEx nA IIC T3C

PC420Vxx-yy-EX

Ga EEx d IIC T3

EEx nA IIC T3C

For hazardous area locations, sensor must be installed in

accordance with installation instructions or local code

requirements.

Notes:

(1) maximum loop resistance (RL) can be calculated by:

(max. resistance) = (V

DC power

- 10 V) / 20 mA

DC Supply

voltage

(max. resistance)

(min. wattage capability)

12 VDC 100   W

20 VDC 500  ¼ W

24 VDC 700  ½ W

26 VDC 800  ½ W

30 VDC 1.0 k ½ W

(2) Lower resistance is allowed, greater than 10  recommended

(3) Minimum R

wattage determined by: (0.0004 x R

)

012, rev. 1.01 Page 1/2

ALTHEN GmbH Mess- und Sensortechnik

Frankfurter Str. 150 - 152

65779 Kelkheim / Germany

 +49 6195 70060

 +49 6195 700666

http://www.althensensors.com

 info@althen.de

Table 1: Part Number Configuration PC420xx-yy-EX

xx (output 4… 20 mA) -yy (Full Scale Range)

Acceleration: Velocity:

AR = Acceleration, RMS -05 = 5 g (49 m/s²) -05 = 0.5 ips (12.8 mm/s)

AP = Acceleration, equivalent peak -10 = 10 g (98 m/s²) -10 = 1.0 ips (25.4 mm/s)

ATP = Acceleration, true peak -20 = 20 g (196 m/s²) -20 = 2.0 ips (50.8 mm/s)

VR = Velocity, RMS -30 = 3.0 ips (76.2 mm/s)

VP = Velocity, equivalent peak -50 = 5.0 ips (127 mm/s)

VTP = Velocity, true peak

Dimensions

Dimensions in in

ches (mm), approx. values

These drawings are for information only and not intended for engineering.

Please contact us for detailed drawings.

Wiring

Connector Pin Function

Red Loop positive (+)

White Loop negative (-)