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8 Intrinsically Safe Installation Wiring Requirements
Each intrinsically safe cable must include a grounded shield or be run in a separate
metal conduit.
HAZARDOUS LOCATION
The Optional 4-20mA Position
Output from the SVI-II AP must not
be connected in an Intrinsically Safe
Installation which requires FM or
CSA approval (SEE NOTE 9.4)
SVI-II
Remote
1
R
Mount
2
E
M
3
SVI-II AP
SW
-
+
Optional
Solendoid
SEE NOTE 9.6
ES-699 Rev AA
Page 11 of 16
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SEE 9.1, 9.2
OPTIONAL HAND
HELD
COMMUNICATOR
(SEE NOTE 9.9)
-
+
4-20 mA
OUT
+
4-20 mA
IN
-
-
PV
1-5 VDC
Optional 1-5 Volt
Process Variable
Input to SVI-II AP
+
TRANSMITTER
-
Optional Intrinsically Safe Process
Variable Transmitter
NON-HAZARDOUS LOCATION - UNSPECIFIED EXCEPT
THAT BARRIERS MUST NOT BE SUPPLIED FROM NOR
CONTAIN UNDER NORMAL OR ABNORMAL CONDITIONS
A SOURCE OF POTENTIAL WITH RESPECT TO EARTH IN
EXCESS OF 250 VOLTS RMS OR 250 VOLTS DC
1
3
250
4
2
Transmitter Barrier Type with
interanl of external Sense
Resistor (SEE NOTE 9.4)
Potential
3
1
4-20 mA SETPOINT from
Control System
4
2
3
1
4
2
3
1
250
4
2
3
1
4
2
LOAD
SEE NOTE 9.6
.
Masoneilan SVI II AP Digital Positioner Quick Start Guide =| 77
24 VDC from
Control System
1 to 5 Volts POSTION
FEEDBACK to Control
System
Equi-
OPTIONAL HAND
HELD
COMMUNICATOR
SHUNT ZENER DIODE SAFETY
BARRIER Controller Output Type
(SEE NOTE 9.3 and 9.5)
1 to 5 Volts to Control
System
24 VDC from
Control System
SHUNT ZENER DIODE SAFETY
BARRIER Transmitter Type with
Internal or External Sensing Resistor
(SEE NOTE 9.5)
SHUNT ZENER DIODE
SAFETY BARRIER (SEE
NOTE 9.6)
24 VDC from
Control System
DI to Control
System
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