D1044
- SIL 2 - SIL 3 Digital Relay Output
G.M. International ISM0080-10
13
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
consists of the following steps.
This test reveals almost 99 % of all possible Dangerous Undetected failures in the digital relay module.
Steps
Action
1
Bypass the Safety-related PLC or take any other appropriate action to avoid a false trip.
2
For the single channel, verify the input to output channel functionality:
a) For the NO contact, the output load is normally energized (NE) when the input channel is ON, while the de-activation (Fail-Safe State) of the input
channel de-energizes the load;
b) For the NC contact, the output load is normally de-energized (ND) when the input channel is ON, while the de-activation (Fail-Safe State) of the
input channel energizes the load.
The channel functionality must be verified in the 20 to 30 Vdc supply voltage range of the module. Connect a DC power supply to the input terminals, in
order to enable or disable the input channel. In order to check the ohmic continuity of the NO and NC contacts, connect an ohmmeter in series with the
NO-COM output contact and another one in series with the NC-COM output contact. Perform the following procedure:
1.
Do not enable (DC power supply voltage
≤
1V) the input channel (terminals “5” - “6” or “7” - “8”) of the unit under test and verify that the ohmic
continuity is absent at the NO-COM output contact (terminals “13/14” - “15” or “9/10” - “11”), while it is present at the NC-COM output contact
(terminals “16” - “15” or “12” - “11”);
2.
Enable (DC power supply voltage
≥
6V) the input channel (terminals “5” - “6” or “7” - “8”) of the unit under test and verify that the ohmic continuity is
present at the NO-COM output contact (terminals “13/14” - “15” or “9/10” - “11”), while it is absent at the NC-COM output contact
(terminals “16” - “15” or “12” - “11”).
3
Remove the bypass from the safety-related PLC or restore normal operation.
D1044 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 D1044 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.
D1044 series must be installed, operated and maintained only by qualified personnel, in accordance to the relevant national/international 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.
Warning: de-energize main power source (turn off power supply voltage) and disconnect plug-in terminal blocks before opening the enclosure to avoid electrical shock
when connected to live hazardous potential.
Explosion Hazard: to prevent ignition of flammable 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
D1044 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
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
16
13/14
Power Supply
3
4
Must not use or generate
more than 250 Vrms or Vdc
15
Intrinsically
Safe Equipment
9/10
11
12
Non-incendive
Equipment
Power Supply
5
6
Control
Equipment
7
8
Control
Equipment
+
-
16
13/14
15
12
9/10
11
6
5
Control
Equipment
8
7
Control
Equipment
+
-
3
4
D1044 Associated Apparatus
FM Approved
under Entity Concept
and non-incendive field wiring
