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HEAVY DUTY LIMIT SWITCHES
HDLS Series
Heavy Duty Limit
Switches
The HDLS Series Heavy Duty Limit Switches offer a wide choice of mounting and actuator options.
Housed in a rugged, die-cast zinc body which is epoxy coated for protection, they are perfectly suited to
special applications in harsh duty environments where conventional limit switches may not be used.
Versatile and full featured, they are designed for long life.
Listings referenced in this section are mainly standard. Low temperature and fluorocarbon (FC, high
temperature) construction is available in all forms of HDLS limit switches. For temperature ranges see
table opposite. Also available are factory sealed, pre-wired switches.
Low temperature switches have fluorosilicone diaphragm, shaft seals and external boot seal (where
applicable) plus a low temperature lubricant. If prewired with cable, temperature limits are -10 °C (14 °F)
flex and -30 °C (22 °F) no flex.
To order a low temperature version insert the additional letters Y and B as in the following example:
LSA1A - standard side rotary plug-in switch
LSYAB1A - low temperature version.
Completely fluorocarbon (FC) sealed, high temperature, chemical resistance switches have a full FC
body gasket covering the switch cavity. Rotary types have an extra FC seal on the operating shaft, while
plunger versions have FC boot seals. They are for use in applications where the environment includes
fire-resistant synthetic fluids. The additional FC seals also promote longer operating life for rotary
actuacted HDLS switches in applications where the temperatures are normally -12 °C to 121 °C (10 °F to
250 °F). If prewired with cable, temperature limits are 105 °C (221 °F) dry and 60 °C (140 °F) wet.
To order a fluorocarbon (FC) sealed switch insert the additional letters Y and C as in the following
example:
LSA1A - standard side rotary plug-in switch
LSYAC1A - completely FC sealed version.
Factory sealed, pre-wired limit switches have the entry area completely sealed and are available with 6 ft
(1,83 m), STOOW-A cable or 4, 5 or 9-pin connectors. NEMA ratings are, for cable version 1, 4, 6, 6P, 12,
for connector version 1, 4, 6, 6P, 12, 13.
To order a factory sealed switch add the appropriate letter:
Circuitry Cable ½ in Connector (available with ½ in conduit tap only)
SPDT CA (4 pin mini)
B (5 pin mini)
DD (4 pin micro)
DPDT M (¾ in only) R (9 pin)
Example:
LSA1AC - LSA1A with 6 ft of 5 conductor STOOW-A cable
LSJ2BM-7N - LSJ2B-7N with 6 ft of 9 conductor STOOW-A cable
LSA1AB - LSA1A with 5 pin receptable
LSA1ADD - 4 pin micro-change connector
Electrical ratings
10 amps continuous carry. Circuits on any one pole must be the same polarity.
ac Volts
Pilot duty: 600 Vac, 720 VA
Amps at 0.35 Power Factor
Vac Make Break
A 120 60 6
SPDT 240 30 3
NEMA 480 15 1.5
A600 600 12 1.2
B 120 30 3
DPDT 240 15 1.5
NEMA 480 7.5 0.75
B600 600 6 0.60
C 250 Vac or 60 Vdc, 0.050 amp max.
SPDT/DPDT
dc Volts
Pilot duty: 240 Vdc, 30 watts
Make and Break Amps
Vdc Inductive Resistive
A 120 0.25 0.8
SPDT 240 0.15 0.4
B 120 0.25 0.8
DPDT 240 0.15 0.4
C 250 Vac or 60 Vdc, 0.050 amp max.
SPDT/DPDT
Levers: Levers for side rotary
types are ordered separately (see
pages 69-71 for details)
Actuators
