Honeywell Limit switch 240 Vac 10 A Tappet momentary GLAC01C IP66 1 pc(s) GLAC01C 用户手册

Limit and Enclosed Switches

Standards/How to read and understand the bar chart information

Honeywell 1  Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada

IEC 947-1 explains the general rules relating to Low-voltage

switchgear and controlgear. The purpose of this standard is to

harmonize as much as possible the product performance and test

requirements for equipment where the rated voltage does not ex-

ceed 1,000 VAC or 1,500 VDC.

IEC 947-5-1 is part 5 of the general rules which relates to Control-

circuit devices and switching elements. Also within this part there

is a section which considers Special Requirements For Control

Switches With Positive Opening Operation. Any control switch

which has this positive opening operation and conforms to these

special requirements will be marked on the outside of the product

with this symbol:

The Contact Element Form defines the configuration of the contacts

and the number of contacts within the switch. e.g.

Form Za – both contact elements have the same polarity.

Form Zb – the two contact elements are electrically

separated.

The Utilization Category defines the type of current carried (AC)

Alternating current, (DC) Direct current and the typical application in

which the switch is used e.g.

AC15 – Control of Electromagnetic Loads (less than 72VA)

DC13 – Control of electromagnets.

The contact rating Designation relates to the utilization categories

and defines the conventional thermal current lth (A), rated oper-

ational current le (A) at rated operational voltages Ue and the VA

rating e.g.

A600 – The ‘‘A’’ denotes the maximum VA rating (AC) and the

‘‘600’’ denotes the maximum rated (AC) voltage.

Q300 – The ‘‘Q’’ denotes the maximum VA rating (DC) and the

‘‘300’’ denotes the maximum rated (DC) voltage.

These IEC standards have been adopted by CENELEC (The Eu-

ropean Commitee for Electrotechnical Standardization) and have

been identified by replacing IEC with EN 60 e.g.

IEC 947-5-1 then becomes EN 60947-5-1.

CENELEC has defined the dimensions and characteristics of two

types of limit switch in the standards EN 50041 and EN 50047.

These standards relate to Low voltage switchgear and control-

gear for industrial use and define the enclosure dimensions, the

operating point for various head actuators, the earth terminal re-

quirement, the terminal marking and the minimum degree of IP

protection.

AC15

A600

6

3

1.9 1.5 1.4 1.2

7200

720

AC15

A300

6

3

—

—

—

—

7200

720

AC15

B300

3

1.5

—

—

—

—

3600

360

AC14

D300

0.6 0.3

—

—

—

—

432

72

125V 250V

DC13

Q300

0.55 0.27

69

69

DC13

R300

0.22 0.1

28

28

The following example relates to a unit which has a snap action

basic and which has a roller pin plunger actuator i.e. GLCB01C.

When reading these bar charts follow these rules:
1. Check what type of actuator was used to test the product, this

All dimensions are in mm/(inches).

Look at Figures A and B as examples. Actuator type used for test is

the linear Cam travel type (b) shown left. The start point is at the

arrow marked ‘‘A’’ (See fig. B). This shows the free position to be 5.3

mm from the vertical center line of the unit. At this stage there is a

circuit between the terminals 21-22 but no circuit between terminals

13-14. The unit can be actuated until it reaches the operating posi-

tion which is 10.5 mm from the center line – a travel distance of 10.5 –

5.3 = 5.2 mm from the free position. At this point the circuit arrange-

ment changes – no circuit between 21-22 but making a circuit

between 13-14. If, however, the contacts of terminals 21-22 weld

together and will not separate, a mechanical safety feature will take

effect if the switch is travelled past the point from which positive

opening is assured, 13.9 mm. As the switch returns it reaches the

release position at 8.9 mm from the center line. The circuit will

change back to the original state and the difference between the

operating position and the release position gives what is known as

the differential travel i.e. 10.5 – 8.9 = 1.6 mm. The asterisk (*)

indicates the point from which the positive opening is assured.