hengstler — Hengstler Signo 721 Preset Counter Instruction Manual

2 Safety • To ensure proper protection of terminals against hand contact, make sure that the live conductors are properly connected to the terminals. • Do not establish any connections with non-allocated (“NC”) terminals. • Counters may only be operated in a properly installed condition. • If safe operation seems to be impaired, make the counter inoperable and secure it against inadvertent operation. • The installation and wiring environment has considerable impact on the electromagnetic compatibility of the counter. Therefore, electromagnetic compatibility of the entire plant has to be ensured during the installation.

English • The fabricator of these complete units or systems takes responsibility for conforming to theCE Directive. • In areas presenting the risk of ESD (electrostatic discharge), make sure to use ESD-protected plugs and switches during the installation. • If the functions “prescaler input”, “preset input”, “correction value” and “key reset” are not allowed to be used by the machine/plant operator, access to these functions must be blocked for machine operators. Depending on the machine/plant design or concept, non-permissible input may impair the operational safety and function of the machine or plant. • In oily environments a delamination of the front sheet is possible.

Therewith the tightness of the counter may be affected. We suggest to use a protection cover as a countermeasure (see chapter 7, 9 and 14). 95