Intrinsically Safe Pre-Amplifiers

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).

Product Specifications

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.

CSA Electronics Certification
ATEX Electronics Certification
EC Declaration of Conformity and Installation Instructions

Input Power

13 to 30 VDC, 35 mA @ 24VDC (Class I, Zone 0, IIC models)
7.5 to 30 VDC, 10 mA @ < 10VDC (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" (dependent on target geometry and construction)
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: 10 Hz 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: 60 volts RMS
Max. distance from sensor to preamp: 100'

Pulse Output Options

All output options must be factory installed
Open Collector
TTL/CMOS (standard) fanout of 5 TTL/CMOS loads

Interconnection Options

Three (3) pin MIL-C-5015 type connector with gold plated pins; mates with MS3106-10SL-3S; other connector types upon request.
Pigtail with wires or cables.
NPT threaded body with wire or cable pigtail for explosion proof environments.

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"

Atex Certified: Custom & Standard Speed Sensors for Intrinsically Safe applications (also approved by CSA w/NRTL/C)

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

Model Number	Description	Output (Pulse Range)	Enclosure Cover Type
PMX-0001-3	for use with VR sensor	open collector	standard lid
PMX-0001-4	for use with VR sensor	0-5 Vdc	standard lid
PRX-0002-3	for use with RF sensor	open collector	standard lid
PRX-0002-4	for use with RF sensor	0-5 Vdc	standard lid