Date:
Drawn:
Issue:
Appd.
Date:
European Safety Systems Ltd.
Impress House
Mansell Road
Acton
London W3 7QH
D 5037 Sheet 1 of 2
D5037a.dwg
MRS
10-01-07
MRS
A
2S
warning signals
Hazardous (Classified) Location
Class I, Division 1, Groups A, B, C, D
Class I, Zone 0, Groups IIA, IIB, IIC
IS-mC1 Sounder Section
IS Class I, Zone 0, AEx ia IIC T4
(
−
40
°
C
≤
T
a
≤
+
60
°
C)
Entity Parameters:
Terminals
+
w.r.t.
−
U
i
= 28V
I
i
= 93mA
P
i
= 660mW
C
i
= 0
L
i
= 0
Terminals
S2 & S3 w.r.t. -
U
i
= 28V
I
i
= 0
Ci = 0
Uo = 16.8V
Io = 7.3mA
Po = 31mW
Unclassified Location
Associated Apparatus - Shunt Zener Diode
Barrier with Entity Parameters:
U
o
≤
28V
I
o
≤
93mA
P
o
≤
660mW
C
o
≥
C
cable
(see note 10)
L
o
≥
L
cable
Associated Apparatus - Diode Return Barrier
with Entity Parameters:
U
o
≤
28V
I
o
= 0
C
o
≥
C
cable
Associated Apparatus - Diode Return Barrier
with Entity Parameters:
U
o
≤
28V
I
o
= 0
C
o
≥
C
cable
+
-
S2
S3
1. No revision to drawing without prior FM approval.
2. The associated apparatus must be FM approved.
3. The associated apparatus manufacturer's installation drawing must
be followed when installing this equipment.
4. Installation should be in accordance with ANSI/ISA RP12.06.01
"Installation of Intrinsically Safe Systems for Hazardous (Classified)
Locations" and the National Electrical Code (ANSI/NFPA 70).
5. The resistance between the intrinsically safe ground and the earth
ground must be less the 1 ohm.
6. The Shunt Zener Diode Barrier
must be a FM approved, resistively
limited, single channel barrier having parameters less than, or equal
to, those quoted, and for which the output is non-ignition capable for
the Class, Division or Zone and Group of use.
7. The IS-mC1 Combined Unit enclosure has an ingress protection
rating of IP 65. If supplied without cable entry devices then metallic or
plastic cable glands, or conduit hubs, shall be fitted that provide the
required environmental protection.
8. To prevent ignition of flammable or combustible atmospheres,
disconnect power before servicing.
9. Substitution of components may impair safety.
10. The total capacitance connected to ter/- of the sounder,
i.e. C
cable
plus any other capacitance, shall not exceed 83nF.
11. If the sounder and /- supply terminals are connected
internally then the wiring used for such a connection shall have a
minimum radial thickness of insulation of 0.5mm.
Notes:
CAUTION - Bonding between conduit connections is not automatic
and must be provided as part of this installation.
CAUTION - The clearance between sounder terminals S2 and S3 is
less than 6mm.
Drawing No.
Computer Ref.
IS-mC1 Combined
SOUNDER / BEACON
Control Drawing for shunt zener
diode barrier / diode return barrier.
Title
21-04-06
-
+
IS-mC1 Beacon Section
IS Class I, Zone 0 AEx ia IIC T4
(
−
40
°
C
≤
T
a
≤
+
60
°
C)
Entity Parameters:
Terminals
+
w.r.t.
−
U
i
= 28V
Ii = 660mA
P
i
= 1.2W
C
i
= 0
L
i
= 0
+
-
NOTE:
THE BEACON SECTION CAN BE CONNECTED
TO IT'S OWN BARRIER INDEPENDENT OF THE
SOUNDER SECTION. THE REQUIREMENTS OF
CONTROL DRAWING D5036 SHEET 1 CAN THEN
BE APPLIED TO THE BEACON SECTION. IF THIS
OPTION IS USED, THE INTERNAL LINKS
BETWEEN THE SOUNDER SECTION AND
BEACON SECTION MUST NOT BE FITTED.
(S
ee
N
ote
11)
SCHEDULE DRAWING
No modification permitted
without reference to the
"Notified Body"
