SIEMENS
13/147
Siemens IC 10 · 2017
SIRIUS 3SE7 Cable-Operated Switches
3SE7 metal enclosures
13
■
Overview
3SE7 cable-operated switches
The cable-operated switches are used for monitoring or as
EMERGENCY-STOP devices on particularly endangered system
components.
As the effective range of a cable-operated switch is only limited
by the length of the trip-wire, large systems can also be pro-
tected. Cable-operated switches (requiring pulling at both ends)
and conveyor belt unbalance trackers are used primarily for
monitoring very long belt systems.
Contact blocks
The switches for wire lengths up to 50 m are supplied with
1 NO + 1 NC or 2 NC contacts and those up to 75 m with
1 NO + 3 NC contacts. The switches for wire lengths of 2 x 75 m
and the conveyor belt unbalance tracker are supplied with
2 NO + 2 NC contacts.
The NC contacts of the cable-break or cable-pull signaling are
positive opening. The NO contact can be used, for example, for
signaling purposes.
Free position and display
Cable-operated switches with one-side operation are held in
free position by the pre-tension on the turnbuckle.
On switches with interlocking, with a pre-tensioned cable, the
locking must be deactivated beforehand in order to return the
cable-operated switch to its original position.
The cable-operated switch and the conveyor belt unbalance
tracker can be supplied optionally with a factory-fitted LED (red,
24 V DC). This light in innovative chip-on-board technology
allows the operating state of the switch to be visible at a distance
of at least 50 m.
■
Application
Standards
The switches are equipped with latching mechanism and
positive NC contacts and are thus suitable for operation in
EMERGENCY STOP devices according to EN ISO 13850.
■
Technical specifications
More information
Home page,
see www.siemens.com/sirius-commanding
Industry Mall,
see www.siemens.com/product?3SE7
Manual,
Type
3SE7120
3SE7150
3SE7140
3SE7141
3SE7160
3SE7310
General data
Standards
IEC 60947-5-1, EN 60947-5-1;
IEC 60204-1, EN 60204-1; EN ISO 13850
Approvals
UL/CSA
Electrical design
Contacts electrically isolated from each other
Electrical load
• 2-pole, at AC-15
400 V AC, 6 A
400 V AC, 6 A
250 V AC, 2 A
400 V AC, 6 A
--
• 3-pole, at AC-15
250 V AC, 2 A
--
--
--
--
• 4-pole, at AC-15
--
--
--
400 V AC, 6 A
400 V AC, 6 A
• Minimum
24 V AC/DC, 10 mA
Short-circuit protection
A
6 (slow)
Mechanical endurance
> 1 million operating cycles
Contact material
Fine silver
Operation
By pulling or breaking of wire
Wire length, maximum
m
10
25
50
75
2 x 75
–
Distance between wire supports, max.
m
2.5
3
5
–
Enclosures
Enclosure material
GD Al alloy, coated (color), dark black RAL 9005
Cover
Shock-resistant thermoplast
Degree of protection
acc. to IEC 60529
IP65
IP67
IP65
Ambient temperature
°C
–25 ... +70
Mounting
Designed for M5
Fixing spacing
mm
30 and 40
Cable entry
2 x (M20 x 1.5)
1 x (M16 x 1.5)
3 x (M20 x 1.5)
2 x (M25 x 1.5)
Connection type
Screw terminals M3.5, self-lifting clamp terminal
© Siemens AG 2016