7
D1020
- SIL 2 Powered Isolating Driver Smart-Hart compatible
G.M. International ISM0012-14
Testing procedure at T-proof
The proof test must be performed to reveal dangerous faults which cannot be otherwise detected. This means that it is necessary to specify how dangerous undetected faults, which
have been noted during the FMEDA analysis, can be revealed during the proof test.
The
Proof Test 1
consists of the following steps:
This test will detect approximately 70% of possible Dangerous Undetected failures in the repeater.
The
Proof Test 2
consists of the following steps:
This test will detect approximately 99% of possible Dangerous Undetected failures in the repeater.
Steps
Action
1
Bypass the Safety-related PLC or take any other appropriate action to avoid a false trip.
2
Provide a 20 mA control signal to the driver to open/close the valve and verify that the valve is open / closed. This test is for voltage compliance
problems, such as a loop power supply voltage or increased wiring resistance, and for other possible failures. It requires, however, that the positioned
has already been tested without the driver and does not contain any dangerous undetected failures.
3
Provide a 4mA control signal to the driver to close/open the valve and verify that the valve is closed /open. This test is for possible quiescent current
related failures. It requires, however, that the positioner has already been tested without the driver and does not contain any dangerous undetected
failures
4
Restore the loop to full operation.
5
Remove the bypass from the Safety-related PLC or restore normal operation.
Steps
Action
1
Bypass the Safety-related PLC or take any other appropriate action to avoid a false trip.
2
Perform steps 2 and 3 of the
Proof Test 1
.
3
Perform a two-point calibration of the positioner (i.e. 4 mA and 20 mA) and verify that the output current from the module is within the specified accuracy.
This test requires, however, that the positioner has already been tested without the driver and does not contain any dangerous undetected failures.
4
Restore the loop to full operation.
5
Remove the bypass from the Safety-related PLC or restore normal operation.
D1020 series are isolated Intrinsically Safe Associated Apparatus installed into standard EN50022 T35 DIN Rail located in Safe Area/Non Hazardous Locations or Zone 2, Group IIC,
Temperature Classification T4, Class I, Division 2, Groups A, B, C, D, Temperature Code T4 and Class I, Zone 2, Group IIC, IIB, IIA Temperature Code T4 Hazardous Area/Hazardous
Locations (according to EN/IEC60079-15, FM Class No. 3611, CSA-C22.2 No. 213-M1987, CSA-E60079-15) within the specified operating temperature limits Tamb -20 to +60 °C,
and connected to equipment with a maximum limit for AC power supply Um of 250 Vrms.
Non-incendive field wiring is not recognized by the Canadian Electrical Code, installation is permitted in the US only.
For installation of the unit in a Class I, Division 2 or Class I, Zone 2 location, the wiring between the control equipment and the D1020 associated apparatus shall be accomplished
via conduit connections or another acceptable Division 2, Zone 2 wiring method according to the NEC and the CEC. Not to be connected to control equipment that uses or generates
more than 250 Vrms or Vdc with respect to earth ground. D1020 series must be installed, operated and maintained only by qualified personnel, in accordance to the relevant
national/nternational installation standards (e.g. IEC/EN60079-14 Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than
mines), BS 5345 Pt4, VDE 165, ANSI/ISA RP12.06.01 Installation of Intrinsically Safe System for Hazardous (Classified) Locations, National Electrical Code NEC ANSI/NFPA 70 Section
504 and 505, Canadian Electrical Code CEC) following the established installation rules, particular care shall be given to segregation and clear identification of I.S. conductors from non
I.S. ones. De-energize power source (turn off power supply voltage) before plug or unplug the terminal blocks when installed in Hazardous Area/Hazardous Locations or unless area is
known to be nonhazardous.
Warning: substitution of components may impair Intrinsic Safety and suitability for Division 2, Zone 2. Explosion Hazard: to prevent ignition of
lammable or combustible atmospheres, disconnect power before servicing or unless area is known to be nonhazardous.
Failure to properly installation or use of the equipment
may risk to damage the unit or severe personal injury. The unit cannot be repaired by the end user and must be returned to the manufacturer or his authorized representative.
Any unauthorized modification must be avoided.
Warning
D1020 Associated Apparatus
FM Approved
under Entity Concept
and non-incendive field wiring
Unclassified Locations or
Hazardous (Classified) Locations
Class I, Division 2, Groups A, B, C, D, T-Code T4
Class I, Zone 2, Group IIC, IIB, IIA, T-Code T4
FM Approved under Entity Concept,
or third party approval
Hazardous (Classified) Locations
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III, Division 1
Class I, Zone 0, Group IIC, IIB, IIA
Intrinsically
Safe Equipment
Must not use or generate
more than 250 Vrms or Vdc
Control
Equipment
Unclassified Locations
Unclassified Locations or
Hazardous (Classified) Locations
Class I, Division 2, Groups A, B, C, D, T-Code T4
Class I, Zone 2, Group IIC, IIB, IIA, T-Code T4
Hazardous (Classified) Locations
Class I, Division 2, Groups A, B, C, D
Class II, Division 2, Groups E, F, G
Class III, Division 2
Class I, Zone 2, Group IIC, IIB, IIA
FM Approved under non-incendive field
wiring (permitted only for US installations),
or third party approval
Non-incendive
Equipment
Unclassified Locations
14
15
1
2
+
-
+
-
-
+
Power Supply
3
4
Must not use or generate
more than 250 Vrms or Vdc
-
+
Control
Equipment
6
5
Intrinsically
Safe Equipment
-
+
11
10
-
+
-
-
+
+
Control
Equipment
Power Supply
Control
Equipment
D1020 Associated Apparatus
FM Approved
under Entity Concept
and non-incendive field wiring
15
11
10
14
2
3
4
6
5
1
-
-
+
+
Non-incendive
Equipment
