Pulse isolator / switch amplifier




  • Input: NAMUR, NPN open collector, contact
  • Output: 2 x relay or NPN transistor output
  • 2.5 kVAC 4-port galvanic isolation
  • Line Fault Detection (LFD) / cable break detection
  • Power supply 16.8 VDC…31.2 VDC
Zone2 Ex Iec Iecex Zone2 Fmapprovedcus Zone2 UL List CCC Pending UKCA CE Pr Rohs Guarantee
  1. Overview + -

  2. Technical details + -

  3. Accessories + -

  4. Order and delivery + -

  5. Why choose PR + -

Functional highlights

  • Interfaces a NAMUR sensor to typical control system input cards.
  • High 4-port isolation provides surge suppression that protects the control system from transients and noise and eliminates ground loops.
  • Provides simple splitter function: 1 in – 2 out.
  • Monitor signal source for cable short-circuit or cable break with alarm function on secondary output, power rail and LED status.
  • The device can be mounted in Safe area or in Zone 2 / Division 2 areas.
  • All terminals are over-voltage protected, polarity protected and short-circuit protected.

Technical highlights

  • Output options: NPN transistor or mechanical relay.
  • Response time: Relay < 20 ms / NPN < 0.1 ms.
  • Collective DIN-rail alarm.
  • Line Fault Detection (LFD) / cable break detection.
  • Wide ambient temperature range -25...70°C.
  • NAMUR NE21, NE44.
  • Conforms to IEC 60947 standard - switch amplifiers for NAMUR sensors.


  • Easy configuration via DIP-switches.


  • Units can be mounted side by side, horizontally and vertically, without air gap on a standard DIN rail, even at 70°C ambient temperature. 
  • Units can be supplied separately or installed on PR 9400 power rail.
  • The narrow 6.1 mm housing allows up to 163 units per meter.

Data sheet & Manuals

Data sheet


Approvals & Certificates

ATEX certificate

IECEx certificate

UKEX certificate

UL certificate

FM certificate

Supplementary documentation

EU Declaration of Conformity

UKCA Declaration of Conformity

EMC data

PR default configurations

Safety note

Safety note

Environmental Conditions

Operating temperature -25°C to +70°C
Storage temperature -40°C to +85°C
Calibration temperature 20...28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
Installation in Pollution degree 2 & meas. / overvoltage cat. II

Mechanical specifications

Dimensions (HxWxD) 113 x 6.1 x 115 mm
Weight approx. 70 g (3202A1) / 80 g (3202A2)
DIN rail type DIN EN 60715/35 mm
Wire size 0.13...2.5 mm2 / AWG 26...12 stranded wire
Screw terminal torque 0.5 Nm

Common specifications


Supply voltage 16.8...31.2 VDC
Max. power dissipation 0.65 W (3202A1) / 0.95 W (3202A2)
Max. required power ≤ 1.2 W

Isolation voltage

Isolation voltage, test / working 2.5 kVAC / 300 VAC (reinforced)

Auxiliary supplies

Sensor supply limitation 8.2 VDC, max. 8.2 mA @ 0 VDC

Input specifications

NAMUR input

NAMUR according to EN 60947-5-6
Trig level LOW < 1.2 mA
Trig level HIGH > 2.1 mA
Sensor supply 8.2 VDC

NPN and mechanical switch

Max. input frequency 5 kHz
Trig level LOW < 1.2 mA
Trig level HIGH > 2.1 mA
Max. input voltage 24 VDC

Output specifications

Relay output

Max. voltage 250 VAC / 200 VDC
Max. current 2 AAC
Max. AC power 100 VA
Max. DC current, resistive load ≤ 30 VDC 2 ADC
Max. DC current, resistive load > 30 VDC See manual for details
Max. switching frequency 20 Hz
Response time < 20 ms

NPN output

Max. voltage 30 VDC
Max. switching frequency 5 kHz
Min. pulse length > 0.1 ms
Max. voltage drop at 80 mA 2.5 VDC
Response time < 0.1 ms

Observed authority requirements

EMC 2014/30/EU & UK SI 2016/1091
LVD 2014/35/EU & UK SI 2016/1101
ATEX 2014/34/EU & UK SI 2016/1107
RoHS 2011/65/EU & UK SI 2012/3032


IECEx KEM 10.0068X
c FM us FM17US0004X / FM17CA0003X
c UL us, UL 61010-1 E314307
CCC Pending


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Dedicated Presale / Aftersales
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Product deployment
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