6
PENBERTHY
MODEL MGS-314L SERIES LEVEL CONTROL SWITCH
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
OR
FIGURE 3
Control drawing CSA approved intrinsically safe for MGS-314L (7E742-008)
MGS-314L-C Connections
Case
ground
MODEL MGS-314L-C
NO or NC
TB1
COM
Vmax = 40Vdc
Imax = 150mA
C
i
= 0nF
L
i
= 0mH
blue
NC
red
black
C
green
R < 1Ω
NO
TWO-WIRE ENTITY CONTROL DRAWING
Non-hazardous area
Hazardous area
User wiring
INTRINSIC
SAFETY
BARRIER
Cleads
Lleads
Use CSA certified safety barriers:
rated for Class I DIV 1
Group A, B, C, D
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
THREE-WIRE ENTITY CONTROL DRAWING
Non-hazardous area
Hazardous area
User wiring
INTRINSIC
SAFETY
BARRIER
MULTIPLE
CHANNEL
Cleads
Lleads
Use CSA certified safety barriers:
rated for Class I DIV 1
Group A, B, C, D
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
MODEL MGS-314L-C
MAG. SWITCH
NO
TB1
NC
COM
Vmax = 40Vdc
Imax = 150mA
C
i
= 0nF
L
i
= 0mH
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).
R < 1Ω