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Intrinsic Safety Barriers Suitable for Use With Delta Controls Pressure and Level Transmitters

Delta Controls pressure transmitters are intrinsically safe when used with suitable safety barriers. Barriers to a safe area are suitable if the entity parameters are selected so that:

  • 13v < Vmax < 35v
  • 20mA < Imax < 180mA
  • Ca > .03uF+Ccable
  • La > Lcable

In addition, the internal resistance must be selected so that at 20mA, the voltage dropped across the load resistance plus the internal resistance must be less than (Vsupply-13v)

The following are some of the safety barriers that are suitable for use with Delta Controls pressure transmitters:

MANUFACTURER: STAHL
PART NUMBER RATED VOLTAGE INTERNAL RESISTANCE ALLOWABLE LOAD RESISTANCE AT RATED VOLTAGE I.S. CONNECTION FOR CL I,II,III, GROUPS:
9001/01-199-150-10 16 160 10 A-G
9001/01-280-075-10 24 440 110 A-G
9001/01-280-085-10 24 356 194 A-G
9001/01-280-100-10 24 302 248 A-G
9001/01-280-110-10 24 277 273 A-G
9001/01-199-165-10 24 187 363 C-G
MANUFACTURER: CROUSE-HINDS
PART NUMBER RATED VOLTAGE INTERNAL RESISTANCE ALLOWABLE LOAD RESISTANCE AT RATED VOLTAGE I.S. CONNECTION FOR CL I,II,III, GROUPS:
SB19130 M 1801 18 230 20 A-G
SB19130 M 2401 24 440 110 A-G
SB19130 M 2402 24 535 15 A-G
MANUFACTURER: ADALET
PART NUMBER RATED VOLTAGE INTERNAL RESISTANCE ALLOWABLE LOAD RESISTANCE AT RATED VOLTAGE I.S. CONNECTION FOR CL I,II,III, GROUPS:
Z 125/Ex 22 202 133 A-G
Z 129/Ex 28 367 258 A-G
Z 123/Ex-CL 20 178+2V 72 A-G
Z 129/Ex-CL 28 382+2V 268 A-G
Delta Controls Corporation

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