How to read and understand the bar chart

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

basic and which has a roller pin plunger actuator i.e. ZLCB01C.

When reading these bar charts follow these rules:

1. Check what type of actuator was used to test the product, this is

on the drawings which show the head style available. It will be one

of two types:

a) Vertical travel plunger

b) Linear cam travel

2. Start reading from top left of figure B, at the arrow labeled ‘‘A’’.

3. Follow the black arrows and the black strip on the chart. The

black strip indicates that there is a circuit between the terminals

whose numbers are shown on the left and when white there is no

circuit.

All dimensions are in mm/(inches).

Figure A

Figure B

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 5.3mm 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 position 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 arrangement

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. Actuator can continue to travel to

the end position (O.T. Overtravel Position) at total

travel position 17.3mm. 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.

ZLA

ZLB

ZLC

ZLD

ZLE

ZLF

Standard

EN 50041

EN 50041

EN 50047

EN 50047

EN 50047

3-cable entry

EN 50047

2-cable entry

Enclosure

Metal

Plastic

Metal

Plastic

Metal

Plastic

Operating

Temperature

-25~ +120°C

-25~ +80°C

-25~ +80°C

-25~ +80°C

-25~ +80°C

-25~ +80°C

Humidity

<95%RH

<95%RH

<95%RH

<95%RH

<95%RH

<95%RH

Shock/Vibration

10 g / 50 g

10 g / 50 g

10 g / 50 g

10 g / 50 g

10 g / 50 g

10 g / 50 g

Operating Speed

0.05mm-2m/s

0.05mm-2m/s

0.05mm-

2m/s

0.05mm-2m/s

0.05mm-2m/s

0.05mm-2m/s

Operating

Frequency

120 ops/min

120 ops/min

120 ops/min

120 ops/min

120 ops/min

120 ops/min

Contact Resistance

<25m

Ω

<25m

Ω

<25m

Ω

<25m

Ω

<25m

Ω

<25m

Ω

Degree of Protection

IP67

IP65

IP67

IP65

IP67

IP65

Electrical Rating

AC15 A600

DC13 Q300

AC15 A300

DC13 Q300

AC15 A300

DC13 Q300

AC15 A300

DC13 Q300

AC15 A600

DC13 Q300

AC15 A300

DC13 Q300

Dielectric Strength

2500V

2500V

2500V

2500V

2500V

2500V

Mechanical Life

Electrical Life

ZLS Series Global Limit Switches