4
D5244
- SIL 2 - SIL 3 Digital Relay Output , Loop Powered
G.M. International ISM0271-5
Parameters Table
Must
be
Hazardous Area/
Hazardous Locations
Device Parameters
D5244 Associated
Apparatus Parameters
Uo / Voc = 0 V
(Uo equal to the
connected I.S. circuit)
Ui / Vmax
In the system safety analysis, always check the Hazardous Area/Hazardous Locations devices to conform with the related system documentation, if the device is Intrinsically Safe check
its suitability for the Hazardous Area/Hazardous Locations and gas group encountered and that its maximum allowable voltage, current, power (Ui/Vmax, Ii/Imax, Pi/Pi) are not exceeded
by the safety parameters (Uo/Voc, Io/Isc, Po/Po) of the D5244 series Associated Apparatus connected to it. Also consider the maximum operating temperature of the field device, check
that added connecting cable and field device capacitance and inductance do not exceed the limits (Co/Ca, Lo/La, Lo/Ro) given in the Associated Apparatus parameters for the effective
gas group. See parameters on
enclosure side and the ones indicated in the table below:
D5244 Terminals
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
Io / Isc = 0 mA
(Io equal to the
connected I.S. circuit)
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
Po / Po = 0 mW
(Po equal to the
connected I.S. circuit)
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
≤
Ii/ Imax
≤
Pi / Pi
≤
When connected to other intrinsically safe devices or associated apparatus, check that maximum allowable voltage, current (Ui/Vmax, Ii/Imax) of the D5244 Associated Apparatus are
not exceeded by the safety parameters (Uo/Voc, Io/Isc) of the Intrinsically Safe device, indicated in the table below:
Must
be
Hazardous Area/
Hazardous Locations
Device Parameters
D5244 Associated
Apparatus Parameters
Ui / Vmax = 40V
Uo / Voc
D5244 Terminals
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
li / Imax = 2 A
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
≥
Io / Isc
≥
Ci = 0 nF, Li= 0 nH
Ch1
Ch2
13 - 14 - 15/16
17 - 18 - 19/20
For installations in which both the Ci and Li of the Intrinsically Safe apparatus exceed 1 % of the Co and Lo parameters of the Associated Apparatus (excluding the cable),
then 50 % of Co and Lo parameters are applicable and shall not be exceeded
(50 % of the Co and Lo become the limits which must include the cable such that
Ci C cable
≤
50 % of Co and Li L cable
≤
50 % of Lo).
If the cable parameters are unknown, the following value may be used: Capacitance 60pF per foot (180pF per meter), Inductance 0.20µH per foot (0.60µH per meter).
The Intrinsic Safety Entity Concept allows the interconnection of Intrinsically Safe devices approved with entity parameters not specifically examined in combination as a system
when the above conditions are respected.
For Division 1 and Zone 0 installations, the configuration of Intrinsically Safe Equipment must be FM approved under Entity Concept (or third party approved);
for Division 2 installations, the configuration of Intrinsically Safe Equipment must be FM approved under non-incendive field wiring or Entity Concept (or third party approved).