Siemens 3TK28 User Manual

Description of the individual safety relays
3.2 Overview
3TK28 safety relays
14 Manual, 07/2016, NEB926157502000/RS-AB/003
3.2
Overview
Overview of 3TK28 safety relays
The following tables provide an overview of the 3TK28 safety relays.
3TK28 safety relays with relay enabling circuits
3TK28..
20
21
22
23
24
25
27
28
30
34
SENSORS
Electromechanical X X X X X X X X - X
Solid-state
-
-
-
-
-
-
-
-
-
-
Magnetically-operated switches X - - - - - - - - -
START TYPE
Auto
X
X
X
-
X
X
-
X
-
-
Monitored
X
X
-
X
X
X
X
-
-
-
ENABLING CIRCUITS
Instantaneous 3 NO 3 NO 2 NO 2 NO 2 NO 3 NO 2 NO 2 NO 4 NO 2 NO +
2 NC
Delayed
-
-
-
-
-
-
2 NO
2 NO
-
-
SIGNALING CIRCUITS
Relay
1 NC
1 NC
-
-
-
2 NC
1 NC
1 NC
-
2 NC
Solid-state
-
-
-
-
-
-
-
-
-
-
Max. achievable SIL acc. to
IEC 61508 / IEC 62061
3 2 3 3 2 3 3 / 2
(tv)
3 / 2
(tv)
as BU 3
Max. achievable PL acc. to
EN ISO 13849-1
e d e e d e e / d
(tv)
e / d
(tv)
as BU e

Siemens 3TK28 Specifications

General

Type	Safety relay
Mounting Type	DIN rail mounting
Type of Voltage	AC/DC
Control Supply Voltage at DC	24 V
Performance Level According to EN ISO 13849-1	PL e
Category According to EN ISO 13849-1	Category 4
Mechanical Durability	10, 000, 000 cycles
Electrical Durability	100, 000 cycles
Protection Class	IP20
Product Function	Safety Monitoring
Suitability for Use	Emergency stop, safety doors
Supply Voltage Frequency	50/60 Hz
Control Supply Voltage at AC at 50 Hz	24 V
Control Supply Voltage at AC at 60 Hz	24 V
Stop Category	0
SIL According to IEC 61508	SILCL 3
Type of Electrical Connection	Screw Connection
Rated Control Supply Voltage	24 V