Siemens 3TK2845, Manual

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3TK2845 Multifunction Device Manual
GWA 4NEB 926 2087-22 DS 01
5-1
Applications
5
The following chapter lists common applications. The 3TK2845 multifunction
device can be used for all of these applications. The advantage of using this
device is the fact that several safety-related functions, e.g. protective door
monitoring, monitoring functions using non-contact protective equipment (BWS),
such as light curtains, safety mats and EMERGENCY-STOP control switches,
can be implemented using only one 3TK2845 multifunction device rather than
using several safety relays. In addition, the device is also suited for operational
switching, cascading and adding safety relays (either using contacts or
switching electronically).
This chapter contains only a few examples of possible applications. Depending
on the application, the wiring can differ from the examples shown here.
Chapter Subject Page
5.1 Monitoring an EMERGENCY-STOP control switch with monitored
start-up, protective door monitoring with automatic start-up and
maintenance according to Category 4, EN 954-1. 5-2
5.2 Monitoring an EMERGENCY-STOP control switch with monitored
start-up and a protective door with automatic start-up and
maintenance according to Category 4, EN 954-1. 5-4
5.3 Monitoring an EMERGENCY-STOP control switch and a protective
door with monitored start-up and maintenance according to
Category 4, EN 954-1. 5-6
5.4 Monitoring an EMERGENCY-STOP control switch with monitored
start-up and a protective door with automatic start-up and mainte-
nance according to Category 4, EN 954-1. 5-8
5.5 Monitoring an EMERGENCY-STOP control switch and a protective
door with monitored start-up and maintenance with enabling button
according to Category 4, EN 954-1. 5-10
5.6 Monitoring an EMERGENCY-STOP control switch and protective
door monitoring with tumbler (spring force, locked when de-
energized) according to Category 4, EN 954-1. 5-12
5.7 Monitoring an EMERGENCY-STOP control switch and protective
door monitoring with tumbler (magnetic force, locked when
switched on) according to Category 4, EN 954-1. 5-14