Intrinsic Safety Barriers

As of: Friday, July 11, 2025
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Pepperl&Fuchs-barriers

Standard Features

  • Each system features excitation, sense and signal barriers
  • Available in an enclosure for external mounting or in a chassis mount version
  • R Stahl® and Pepperl&Fuchs barriers that are approved by Factory Mutual (FM)

Intrinsically Safe Barriers

Install these barriers in your safe area to limit the current to the hazardous environment, and insure voltage remains at an intrinsically safe level.

Intrinsic Safety Barriers Specifications

Part # Voltage Range Nominal Resistance Open Circuit Voltage Short Circuit
Current
Classifications
31201:
+ Excitation 9001/01-158-390-101
+12 VDC 55 ohm 15.8 VDC 390 mA FM approved, UL listed, CSA certified, SA, CE marked
31202:
± Excitation 9002/10-187-270-001
±6 VDC 46 ohm 9.3 VDC 270 mA FM approved, UL listed, CSA certified, SA, CE marked
31540:
+ Excitation 9001/01-083-442-101
+6 VDC 26 ohm 8.3 VDC 442 mA FM approved, UL listed, CSA certified, SA, CE marked
70724:
+ Sense 9001/01-086-075-101
+6 VDC 129 ohm 8.6 VDC 41 mA FM approved, UL listed, CSA certified, SA, CE marked
30263:
± Signal 9002/77-093-040-001
±6 VDC 519 ohm 9.3 VDC 20 mA FM approved, UL listed, CSA certified, SA, CE marked
31542:
RS-232 9002/77-093-300-001 
±6 VDC 76.6 ohm 9.3 VDC 150 mA FM approved, UL listed, CSA certified, SA, CE marked
30264:
± Sense 9002/10-187-020-001
±6 VDC 516.5 ohm 9.33 VDC 20 mA FM approved, UL listed, CSA certified, SA, CE marked
30266:
- Excitation 9001/00-086-390-101
-6 VDC 30 ohm 8.6 VDC 390 mA FM approved, UL listed, CSA certified, SA, CE marked
69491:
- Excitation 9001/02-016-150-111
±0.7 VDC 20 ohm 1.64 VDC 150 mA FM approved, UL listed, CSA certified, SA, CE marked
69492:
+ Sense 9001/01-168-020-101
+12 VDC 918 ohm 16.8 VDC 20 mA FM approved, UL listed, CSA certified, SA, CE marked
69493:
- Sense 9001/02-016-015-101
±0.7 VDC 127 ohm 1.64 VDC 15 mA FM approved, UL listed, CSA certified, SA, CE marked
72521:
+ Excitation 9001/01-199-390-101
+16 VDC 67 ohm 19.9 VDC 390 mA FM approved, CSA certified, CE marked
30265:
+ Excitation 9001/01-086-390-101
+6 VDC 30 ohm 8.6 VDC 390 mA FM approved, CSA certified, CE marked
221779:
+ Excitation Barrier, Z713
+13.7 VDC 22 ohm 15.75 VDC 160 mA FM Approved, cULus, ATEX, IECEX
221663:
- Excitation Barrier, Z813
-13.7 VDC 22 ohm 15.75 VDC 160 mA FM Approved, cULus, ATEX, IECEX
221662:
± EX Barrier, Z966
±10 VDC 166 ohm 12 VDC 50 mA FM Approved, cULus, ATEX, IECEX
221660:
± Signal Barrier, Z961 
±6.5 VDC 100 ohm 8.7 VDC 100 mA FM Approved, cULus, ATEX, IECEX
221661:
± Sense Barrier, Z964
±10 VDC 1000 ohm 12 VDC 50 mA FM Approved, cULus, ATEX, IECEX

Parts

Part # Description
Stahl Barriers #1: For models with ± 5 Volt excitation (10 volt)
31202 9002/10-187-270-001, ± excitation barrier
30264 9002/10-187-020-001, ± sense barrie
30263 9002/77-093-040-001, ± signal barrier
109663 DIN rail mounted kit #1 (includes 31202, 30264, 30263)
Barrier Kit #2: (For models with + 10 Volt excitation)
31201 9001/01-158-390-101, + excitation barrier
69491 9001/02-016-150-111, - excitation barrier
69492 9001/01-168-020-101, + sense barrier
69493 9001/002-016-015-101, - sense barrier
30263 9002/77-093-040-001, ± signal barrier
Barrier Kit #3: (For models with + 5 Volt excitation)
31540 9001/01-083-442-101, + excitation barrie
69491 9001/02-016-150-111, - excitation barrier
30263 9002/77-093-040-001, ± signal barrier
If sense leads are for the above, use the following:
199867 900/01-086-075-101, + sense barrier
69493 9001/02-016-015-10, - sense barrier
Miscellaneous Barriers:
30266 9001/00-086-390-101, - excitation barrier
30265 9001/01-086-390-101, + excitation barrier
72521 9001/01-199-390-101, + excitation barrier
197643 Barrier, dual channel, RS-422
31542 9002/77-093-300-001, RS-232
Pepprl-Fuchs Barrier Kit #1 for multiple load cell applications:
221779 Barrier, Z713 +Excitation
221663 Barrier, Z813 -Excitation
221661 Barrier, Z964 +/- Sense
221660 Barrier, Z961 +/- Signal
Pepprl-Fuchs Barrier Kit #2 for single load cell applications:
221662 Barrier, Z966 +/- EX
221661 Barrier, Z964 +/- Sense
221660 Barrier, Z961 +/- Signal

Options

Part # Description
33531 Rail,DIN 6" Length 35mm Width x 7.5mm High
35815 LIT, Manual IS Barrier Instruction Sheet
110424 Enclosure Assy,IS Barrier FRP Enclosure, Din Rail, 2 Cord Grips Grounding Material *** Barriers Not Included ***
22828 Terminal Block,Grounding Universal DIN Rail Mounted
42219 Fuse,IS Barrier 160mA for Stahl barriers
208123 Isolator, Barrier Mount Din Rail Mounting Clips To Isolate Ground

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