Belt alignment switch

ZS 73 SR

  • Metal enclosure

  • 2 contacts

  • Release by push button (VD) possible

  • Belt-alignment roller made of stainless steel

Technical data

Applied standards

EN 60947-5-1, EN 60947-5-5, EN ISO 13849-1


aluminium die-cast, enamel finish


thermoplastic, glass-fibre reinforced, impact resistant, self-extinguishing UL 94 V-0

Degree of protection

IP65 (IEC/EN 60529)

B10d (10 % load)

ZS 73 SR VD: 200 000;
ZS 73 SR: 2 million


max. 20 years

Contact material


Switching elements

1 NC/1 NO contact or 2 NC contacts, type Zb

Switching system

snap action, positive break NC contacts A


screw connection terminals

Cable cross-section

max. 2.5 mm² (incl. conductor ferrules)

Cable entry

2 x M20 x 1.5

Rated impulse withstand voltage Uimp

6 kV

Rated insulation voltage Ui

400 V

Conventional thermal current Ithe

6 A

Utilisation category


Rated operating current/voltage Ie/Ue

6 A/400 VAC

Short-circuit protection

6 A gG/gN fuse

Ambient temperature

–25 °C … +70 °C

Mechanical life

ZS 73 SR VD:
> 100 000 operations;
ZS 73 SR:
> 1 million operations

Indicator lamp 

as option


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Mounting and wiring instructions – ZS 73 SR

German, English, French, Italian, Portuguese, Russian

PDF 3 MB 25.09.2023
Please go to the relevant product pages for additional downloads.

Variants / Options

The following variants / options are available on request:

  • 2 cable entries
to your contact persons

Other interesting products

Ex ZS 73 SR

Alternative version with explosion protection