8
PENBERTHY
MODEL MGS-314L SERIES LEVEL CONTROL SWITCH
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Use suitably certified safety
barriers for Ex iα IIC
MODEL
MGS-314-A
MGS-314L-A
or ½ MGS-314D-A
MAG. SWITCH
NO or NC
TB1
COM
Vmax = 40Vdc
Imax = 150mA
C
i
= 0nF
L
i
= 0mH
Use suitably certified safety
barriers for Ex iα IIC
TWO-WIRE ENTITY CONTROL DRAWING
THREE-WIRE ENTITY CONTROL DRAWING
Hazardous area
Hazardous area
Non-hazardous area
Non-hazardous area
OR
INTRINSIC
SAFETY
BARRIER
INTRINSIC
SAFETY
BARRIER
MULTIPLE
CHANNEL
User wiring
Cleads
Lleads
Cleads
Lleads
Case
ground
blue
red
black
green
Unused NO or NC lead shall be blind terminated and insulated.
The intrinsic safety barrier parameters must meet the following
requirements:
Voc < 40V or Isc < 150mA; Ca > Cleads; La > Lleads
One multiple channel intrinsic safety barrier must be used.
The barrier parameters must meet the following requirements:
Vt < 40V or It < 150mA; Ca > Cleads; La > Lleads
Installation shall confirm to the manufacturer's instructions supplied
with the intrinsic safety barrier as well as the National Electric Code
and ANSI/ISA-RP 12.6 or CSA C22 "Installation of intrinsically safe
instrument systems in hazardous (classified) locations."
Maximum non-hazardous area voltage must not exceed 250 Vrms or Vdc.
For I.S. installation, temperature shall not exceed 225°F (107°C).
FIGURE 5
Control drawing ATEX/IECEx certified intrinsically safe for MGS-314L (7E742-010)
R < 1Ω
R < 1Ω
MODEL
MGS-314-A
MGS-314L-A
or ½ MGS-314D-A
MAG. SWITCH
NO
TB1
NC
COM
Vmax = 40Vdc
Imax = 150mA
C
i
= 0nF
L
i
= 0mH
User wiring
MGS-314D-A Connections
white
blue
black
green
violet
orange
Case
ground
red
NO
1
NO
2
NC
1
NC
2
C
1
C
2
MGS-314-A and MGS-314L-A Connections
