Download  Print this page

3Tk2845-.Db - Siemens 3TK2845 Manual

Safety relays, multifunction device
Hide thumbs


3TK2845-.DB.. "Monitored Start-Up"
The 3TK2845-.DB.. has two sensor inputs (S1, S2 with monitored start-up), one
cascading input (CAS/OS with automatic start-up) as well as one switching input
(key-operated switch). On the output side there are two relay and two electronic
enabling circuits as well as an electronic signaling output.
Standard operation
In standard operation (key-operated switch "OFF") all enabling circuits are
activated. All input blocks are AND-connected to one another and affect all
enabling circuits at the same time, whereby some are time-delayed.
During maintenance (key-operated switch "ON") only two of the four enabling
circuits are activated. In this case, sensor input S2 (e.g. protective door) has no
function. The hazardous area can be entered since the dangerous motion has
been switched off via the two inactive enabling circuits. The sensor input S1 and
the cascading input CAS/OS still affect the active enabling circuits.
3TK2845 Multifunction Device Manual
GWA 4NEB 926 2087-22 DS 01
Functional Information


Table of Contents

  Related Manuals for Siemens 3TK2845