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 Proof of intrinsic safety showcase

Project name: Loop1
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1/2 G Ex ia IIC T6…T3 Ga/Gb
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
Process pressure measurement KROHNE Messtechnik GmbH   TÜV 20 ATEX 277368 X II 1/2 G Ex ia IIC T6…T3 Ga/Gb 30 131 983 0.005 0
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 972.73 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 0.11 11
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 131
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 983
 YES max. ambient temperature:
Lo ≥ Li + Lc 3 ≥ 0.11
 YES Mixed IS circuit:
Co ≥ Ci + Cc 107 ≥ 11
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop2
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1/2 G Ex ia IIC T6…T3 Ga/Gb
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Output signal conditioner Phoenix Contact GmbH & Co. KG   BVS 20 ATEX E 004 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 586 2 104
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
Process pressure measurement KROHNE Messtechnik GmbH   TÜV 20 ATEX 277368 X II 1/2 G Ex ia IIC T6…T3 Ga/Gb 30 131 983 0.005 0
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 945.45 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 0.11 11
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 131
 YES Ex Group: IIC
Po ≤ Pi 586 ≤ 983
 YES max. ambient temperature:
Lo ≥ Li + Lc 2 ≥ 0.11
 YES Mixed IS circuit:
Co ≥ Ci + Cc 104 ≥ 11
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop3
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1/2 G Ex ia IIC T6…T3 Ga/Gb
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Output signal conditioner Phoenix Contact GmbH & Co. KG   BVS 23 ATEX E 006 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 26.4 98 647 2 89
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
Process pressure measurement KROHNE Messtechnik GmbH   TÜV 20 ATEX 277368 X II 1/2 G Ex ia IIC T6…T3 Ga/Gb 30 131 983 0.005 0
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 809.09 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 0.11 11
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 26.4 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 98 ≤ 131
 YES Ex Group: IIC
Po ≤ Pi 647 ≤ 983
 YES max. ambient temperature:
Lo ≥ Li + Lc 2 ≥ 0.11
 YES Mixed IS circuit:
Co ≥ Ci + Cc 89 ≥ 11
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop4
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1 GD Ex ia IIC T4 Ga
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Li ≥ 1% of Lo
Ci ≥ 1% of Co
Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
IGP10S Schneider Electric   ATEX II 1 GD Ex ia IIC T4 Ga 30 110 800 1.4 2.4
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 100 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 1.5 13.4
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 110
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 800
 YES max. ambient temperature:
0.5 * Lo ≥ Li + Lc 1.5 ≥ 1.5
 YES Mixed IS circuit:
0.5 * Co ≥ Ci + Cc 53.5 ≥ 13.4
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop5
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc IIII
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
Vortex flowmeter KROHNE Messtechnik GmbH   IECExKIWA150021X IIII 30 130 1000 0 10
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 881.82 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 0.1 21
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 130
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 1000
 YES max. ambient temperature:
Lo ≥ Li + Lc 3 ≥ 0.1
 YES Mixed IS circuit:
Co ≥ Ci + Cc 107 ≥ 21
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop6
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1 G Ex ia IIC T6…T3 Ga
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
Process pressure measurement Endress+Hauser SE+Co. KG   KEMA 04ATEX1100 X II 1 G Ex ia IIC T6…T3 Ga 30 300 1000 0 11.8
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 865.45 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 0.1 22.8
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 300
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 1000
 YES max. ambient temperature:
Lo ≥ Li + Lc 3 ≥ 0.1
 YES Mixed IS circuit:
Co ≥ Ci + Cc 107 ≥ 22.8
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop7
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1 GD Ex ia IIC T4 Ga
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Li ≥ 1% of Lo
Ci ≥ 1% of Co
Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
IGP10S Schneider Electric   ATEX II 1 GD Ex ia IIC T4 Ga 30 110 800 1.4 2.4
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 100 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 1.5 13.4
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 110
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 800
 YES max. ambient temperature:
0.5 * Lo ≥ Li + Lc 1.5 ≥ 1.5
 YES Mixed IS circuit:
0.5 * Co ≥ Ci + Cc 53.5 ≥ 13.4
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES



 Proof of intrinsic safety showcase

Project name: Loop8
Certified by:
Certified at:
Non-Ex Zone
     Ex Zone
Associated Apparatus
 Intrinsically safe apparatus / field device
Details Image
Ex i Cable		 Details Image
II 3(1)G Ex ec [ia Ga] IIC T4 Gc II 1 GD Ex ia IIC T4 Ga
Uo ≤ Ui
Io ≤ Ii
Po ≤ Pi
Lo ≥ Li + Lc
Co ≥ Ci + Cc
Comparison of the safety data

Proof of intrinsic safety (simple intrinsically safe circuit)
In a simple intrinsically safe circuit without external concentrated capacitances (Ci) and without external concentrated inductances (Li), the full values of Co and Lo can be exploited.

Proof of intrinsic safety (mixed intrinsically safe circuit)
Condition for the mixed intrinsically safe circuit with external concentrated capacitances (Ci) and/or external concentrated inductances (Li).
Li < 1% of Lo or Ci < 1% of Co
Here, the full values of Co and Lo can also be exploited.
Li ≥ 1% of Lo and Ci ≥ 1% of Co
Values of 50% of Co and Lo are to be used here:
Ci + Cc ≤ 0.5 Co
Li + Lc ≤ 0.5 Lo

Li ≥ 1% of Lo
Ci ≥ 1% of Co
Associated Apparatus
Name Type SerialNumber Manufacturer Certificate Identification Uo [V] Io [mA] Po [mW] Lo [mH] Co [nF]
Power/input isolating amplifier Phoenix Contact GmbH & Co. KG   BVS 08 ATEX E 054 X II 3(1)G Ex ec [ia Ga] IIC T4 Gc 25.2 93 587 3 107
Intrinsically safe apparatus / field device
Name Type SerialNumber Manufacturer Certificate Identification Ui [V] Ii [mA] Pi [mW] Li [mH] Ci [nF]
IGP10S Schneider Electric   ATEX II 1 GD Ex ia IIC T4 Ga 30 110 800 1.4 2.4
Cable capacities and inductance Manufacturer Cable length Cable Lc Cable Cc Maximum cable length Lc Cc
STANDARD [m] [mH/km] [nF/km] [m] [mH] [nF]
(Manufacturer specification (Datasheet) or
Lc = 1 mH/km, Cc = 110 nF/km) 		1 110 100 0.1 11
Li + Lc Ci + Cc
[mH] [nF]
Inductance (Li + Lc) and capacities (Ci + Cc) 1.5 13.4
Condition / Verification for intrinsic safety Intrinsic safety ok Additional condition
Uo ≤ Ui 25.2 ≤ 30
 YES Zone at the installation: Zone 0/1
Io ≤ Ii 93 ≤ 110
 YES Ex Group: IIC
Po ≤ Pi 587 ≤ 800
 YES max. ambient temperature:
0.5 * Lo ≥ Li + Lc 1.5 ≥ 1.5
 YES Mixed IS circuit:
0.5 * Co ≥ Ci + Cc 53.5 ≥ 13.4
 YES (with concentrated Li (≥ 1% Lo) and concentrated Ci (≥ 1% Co): YES