GE Masoneilan 12420 Instruction Manual & Safety Manual page 11

2.2.6. ES-479 I
NTRINSICALLY
Each intrinsically safe cable must include a grounded shield or be run in a separate metal conduit.
HAZARDOUS LOCATION
SEE NOTES 1 & 2
The Optional 4-20 mA
secondary output from 12400
must not be connected in an
Intrinsic Safe Installation which
requires FM or CSA approval.
See Note4.
12400 LEVEL TRANSMITTER /
CONTROLER
PRIMARY OUT
4-20mA
SECONDARY OUT
4-20mA
SW1 / SW2
OUT
OPTIONAL
SOLENOID
VALVE
POSITIONER
Note 6
Note 7
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S I W
AFE NSTALLATION
Note 7
+
-
+
-
+
-
Note 5
Note 7
With or
Without local
Solenoid
+
-
Note 7
R
IRING EQUIREMENTS
NON-HAZARDOUS LOCATION - UNSPECIFIED EXCEPT THAT
BARRIERS MUST NOT BE SUPPLIED FROM NOR CONTAIN
UNDER NORMAL OR ABNORMAL CONDITIONSA SOURCE OF
POTENTIAL WITH RESPECT TO EARTH IN EXCESS OF 250
VOLTS RMS OR 250 VOLTS DC.
3
1
250 Ω
2
4
Barrier with internal or external sense resistor.
Barrier with 4-20 mA retransmit.
3
1
250 Ω
2
4
Barrier with internal or external sense resistor.
3
1
LOAD
2
4
Note 5
Barrier type
See Note 5
Barrier type
See Note 6
3
1
2
4
Note 6
Masoneilan 12400 Series Transmitter/Controller Instruction Manual | 9
VOLTAGE SUPPLY
FROM CONTROL SYSTEM
30V MAXI
1 to 5 Volts or 4-20mA
LEVEL FEEDBACK
to Control System
See Note 3
VOLTAGE SUPPLY
FROM CONTROL SYSTEM
30V MAXI
Note 4
1 to 5 Volts or 4-20mA
LEVEL FEEDBACK
to Control System
See Note 4
VOLTAGE SUPPLY
FROM CONTROL SYSTEM
30V MAXI
DI to CONTROL SYSTEM
4-20 mA SETPOINT
FROM CONTROL SYSTEM