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Ion-science Hydrosteel 7000 User Manual Page 13

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Hydrosteel 7000 MANUAL Ion Science Ltd
Page 13 of 43
Unrivalled Detection. www.ionscience.com
Electrical connections (IS) with safety barriers
Yellow Connector
Thermocouple
junction box
Thermocouple
2
3
E
SCREEN
+V RD
0V BK
Red Connector
SAFE AREA
1
SCREEN
+V RD
0V BK
1
E
3
2
SCREEN
0V BK
+V RD
2
E
3
1
Blue Connector
Hydrosteel 7000
0V
+V
BK
RD
4-20mA 1
0V
+V
0V
RD
BK
Power
+V
BK
RD
4-20mA 2
Control equipment
Installation
Ion Science Ltd suggest using the following or similar safety barrier or IS isolator for IS approved
applications. The system must be designed by a suitably trained engineer and approved by the local safety
authority.
Power Supply:
Suggested barriers for INLET power supply
Manufacture
Manufactures pt. no.
Type
Cable length estimate
m
Pepperl & Fuchs
KFD2-VD-Ex1.1835
Galvanic Isolator
560
Stahl
9175-10-16-11
Galvanic Isolator
335
MTL Ltd
MTL4023
Galvanic Isolator
365
MTL Ltd
MTL7728P
Zener barrier
288
Turck
MK72S06-EX
Galvanic Isolator
686
* Note
All cable lengths are estimated for Zone 1 IIC installation of the equipment
Using 1 mm
2
C.S.A. conductors S.T.P. cables with capacitance of 250 pF/m, L/R ratio of 25 uH/
conductor resistance at 20 C of 18.4 /Km
Calculation assumes that cables are at 80 C (maximum operating temperature).
Signal Output
Suggested barriers for 4-20mA OUTLET
Manufacture
Manufactures pt. no.
Type
Pepperl+Fuchs
Z728
Zener barrier
Pepperl+Fuchs
KFD2STC4-Ex1
Galvanic isolator
MTL
MTL7787 (dual channel)
Zener barrier
MTL
MTL5044 (dual channel)
Galvanic isolator
Stahl
9001/51-280-110-141
Zener barrier
Stahl
9160/13-11-11S
Galvanic isolator
WARNING! Intrinsically safe (IS) applications
HY7K fuses may not be replaced in the field.
If a fuse is blown the Hydrosteel 7000 will require inspection by Ion Science Ltd or and Ion Science Approved
Service Centre before it is used in an IS application.
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