Enabling device
ZSD
- Thermoplastic enclosure
- 1 Cable entry M 20 x 1.5
- Good resistance to oil and petroleum spirit
- Particularly fit for robot applications in accordance with the ANSI Robotics Standard
- The redundant contact configuration enables signal processing using conventional safety relay modules
- Contacts do not close upon reset (level 3 -> level 1)
CONSENT SWITCH
When machines and systems are being set up or converted, or service work has to be carried out on them, it can be advantageous to completely or partially deactivate the protective device. Typical examples here are set-up operation or process monitoring. For example, the operator of a machine tool can better check format settings and programme motion sequences more precisely when the safety door is open. Such cases require special safety measures, so-called special operating modes. These are defined in the Machinery Directive and in some Type C standards. Consent switches play an important role in these measures. These must be held down by the operator to activate a machine function.CONSENT SWITCH: STRUCTURE AND MODE OF OPERATION
An enabling switch must be moved to the centre position and held in this position. If the button is released or pressed, the control command is interrupted in a safety-related manner. The control devices for set-up operation or process monitoring are available from the Schmersal Group in the two series ZSD5 and ZSD6. Both versions are ergonomically shaped, and a push button is also integrated into the device head of the ZSD6 versions. The optimum position in relation to the machine or process can be freely selected; a signal line ensures the connection to the machine control system. Both types of enabling switch are suitable for use in robot applications in accordance with ANSI standards. Schmersal has the appropriate safety relay modules in its range for signal evaluation.
VARIANTS OF ENABLING SWITCHES WITH TWO OR THREE CLOSERS
The enabling switches from Schmersal are equipped with a plastic housing and are largely resistant to oil and petrol. Depending on the series, the switches are equipped with two (ZSD5) or three (ZSD6) NO contacts. The Schmersal Group has provided further detailed information on the two enabling switch series in its extensive online catalogue.