Motion Sensors (MSI) PMX (variable reluctance) and PRX (RF) intrinsically safe preamplifiers offer
features similar to our PA1001A preamplifiers / signal conditioners and can be used in hazardous environments with
intrinsically safe Variable Reluctance VR or RF sensors (e.g.,
PC45-X or RF10-X, respectively).
Unlike our PA1001A preamplifiers, pulse outputs are factory installed and must be indicated when ordering. These
preamplifiers are certified to CSA (with NRTL/C) and LCIE to ATEX (94/9/EC). They are available for Class I, Zone 0,
IIC and II 1 G EEx ia IIC T4 or Class I, Zone 0, IIA and II 1 G EEx ia IIA T4 hazardous locations.
Features and Specifications
Input Power:
13 to 30 VDC, 35 mA @24 VDC (Class I, Zone 0, IIC models)
7.5 to 30 VDC, 10 mA @ < 10 VDC (Class I, Zone 0, IIA models)
Reverse polarity protected
RF Sensor Input:
Modulation carrier frequency: 20 KHz
Input frequency: 2 Hz to 5 KHz, adjustable trigger level
Carrier adjustment: to allow precise tuning of carrier signal to physical environment (e.g., air
gap, wall thickness)
Max. air gap: 0.160"
Preferred coil inductance: 1.0 mH +/- 10%
Max. distance from sensor to preamp: 100'
VR Sensor Input:
Input protected, RF and band pass filtered
Input frequency: 0 to 10 KHz, adjustable trigger level
Trigger sensitivity: 10 mV RMS min. (note: at 10 mV frequency range 10 Hz to 3 KHz)
Input impedance: 40K ohms (nominal)
Max. input signal: 600 volts RMS
Max. distance from sensor to preamp: 100'
Pulse Output Options:
All output options must be factory installed
Open collector Vmos transistor, maximum OFF voltage 30 VDC; maximum ON current
TTL/CMOS (standard) fanout of 5 TTL/CMOS loads
Ambient Temperature:
CSA Certified: -20°C to +40°C ATEX Certified: -40°C to +80°C
Enclosures:
Unit is intended for mounting in a conduit box. Enclosure is not
required (unless using in Class II and III locations in which must be enclosed in an approved Class
II/III enclosure) but recommended to protect unit from moisture, dirt, etc.
Optional explosion proof box available upon request
Entity Parameters:
Group IIC
To barrier: Vmax/Ui = 30 VDC, Imax/Ii = 200 mA Ci/Ci = 0.0uF, Li/Li = 0.50 mH
To sensor: Voc/Uo = 5.9 VDC, Isc/Io = 64 mA Ca/Co = 1 uF, La/Li = 3.5 mH
Approvals:
Intrinsically safe to CSA (with NRTL/C) and LCIE to ATEX (94/9/EC).
CE compliant to EMC Directive 2004/108/EC for use in residential, commercial, light industrial and
heavy industrial environments
Warranty:
Unconditional one (1) year warranty if used within specifications
Physical Dimensions:
Board diameter: 2.75"
Center mounting holes: 2" and 2.5"
Hazardous location: Class I, Zone 0, Group IIC and Class 1, Div. 1 Group A,B,C,D
Model Number
Description
Output (Pulse Range)
Enclosure Cover Type
PMX-0001-1
for use with VR sensor
open collector
standard lid
PMX-0001-2
for use with VR sensor
0-5 Vdc
standard lid
PRX-0002-1
for use with RF sensor
open collector
standard lid
PRX-0002-2
for use with RF sensor
0-5 Vdc
standard lid
Hazardous location: Class 1, Zone 0 Group IIA and Class 1, Div. 1, Group D
