Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
142
Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2
3TK2850 / 3TK2851 / 3TK2852 safety relay
3.8.2.1
Applications
Applications of the 3TK285 safety combination
You can use the 3TK285 safety combination in EMERGENCY STOP devices according to
DIN EN / IEC 60947-5-5 and in safety circuits according to DIN EN / IEC 60204-1, e.g. for
movable guards and protective doors. Depending on the external circuitry, a maximum
performance level PL
d
/ Cat. 3 in accordance with DIN EN ISO 13849-1 or SILCL 2 in
accordance with IEC 62061 can be achieved with this device.
3.8.2.2
Description of function and connection information
The solid-state 3TK285 safety combination has two contactor relays The operating state and
functioning are indicated by three LEDs.
All internal parts of the circuit are cyclically monitored for faults during operation.
Connect the EMERGENCY STOP button or the position switch to terminals Y11, Y12, and
Y21, Y22.
The ON button is connected to Y34 and L+ (24 DC). Terminals Y33, Y34 are jumpered
during autostart operation. Y20 and Y21 are jumpered during 1-channel operation.
Содержание 3TK28
Страница 188: ...Mounting 4 4 Disassembling the device 3TK28 safety relays 188 Manual 07 2016 NEB926157502000 RS AB 003 ...
Страница 204: ...Dimension drawings 6 1 Dimension drawings 3TK28 3TK28 safety relays 204 Manual 07 2016 NEB926157502000 RS AB 003 ...
Страница 206: ...Accessories 3TK28 safety relays 206 Manual 07 2016 NEB926157502000 RS AB 003 ...