Sheffer LA SERIES - Manual (Page 10)

SENSORS
Magnetic
Series 728 and Series 828
Specifications
FEATURES
• Wide voltage range (5-240 Volts
AC or DC)
• Compact design
• Extremely consistent
repeatability
• High intensity LED on all models
offered
• Compatible with most corrosive
and washdown applications
• Both Hall effect and reed
switches work with same piston
magnet
TECHNICAL DATA
• Temperature Range: from -30˚C
to +80˚C
• Shock - Operational up to 30G
(11 msec.) reeds only. Not
applicable for Halls
• Vibration - Operational up to
20G (10-55Hz) reeds only. Not
applicable for Halls
• Most versions designed to meet
NEMA 6 specifications
• CSA versions available on
special order
• Hall effect compatible with
intrinsically safe barriers
Proximity Sensor Type
Descriptions
Reed Switch Sensors
Type 04 & 09 - The type 04 is single
pole single throw (SPST) normally
open and type 09 is single pole single
throw normally closed. Both act as an
in line switch which is actuated in a
magnetic field. These sensors also
include an LED indicator and surge
suppression. The LED indicator
operates when the switch is made with
a minimum 5mA current flowing
through the switch, and a typical 3 volt
drop. Surge suppression helps to
extend the life of the sensor when it is
used to switch higher current loads
and/or inductive loads.
Type 06 - This sensor is a reed-type
sensor which uses a single pole double
throw (SPDT) element. This enables
the switching of two separate loads.
One side of the switch is normally
closed and the other is normally open.
This sensor also includes an LED
indicator which is connected to the
normally open side of the switch. The
LED indicator operates when the
normal open side is closed with a
minimum 5mA current flowing
through the switch and a typical 3 volt
drop.
Type 24 - This sensor is designed
specifically to switch high power AC
loads (including inductive loads) and
loads with high transient or inrush
currents, although they are not limited
to these applications. This switch uses
a reed element to sense a magnetic field
and a triac to drive the output. This
sensor includes standard surge
suppression. This configuration
provides for excellent longevity even
under the most demanding conditions.
The type 24 is normally open.
Hall Effect Sensors
Type 31 & 32 - These sensors use
magnetoresistive elements (similar to
Hall effect) with no magnetic polarity
and much greater sensitivity with no
maximum gauss level. They are 100%
solid state (no moving parts = LONG
LIFE). They are designed to operate
with voltages from 6 to 24V DC and
are provided in two normally open
configurations: NPN (Sinking) output
and PNP (Sourcing) output. Both
include an indicator light which
illuminates when the switch is
actuated. No minimum load current
and low voltage drop make them ideal
for use with programmable controllers.
828 and 728 SERIES
Schematic Representations
1 AC-9