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Operating voltage 24VDC, 115, 230VAC
Voltage tolerance ±10%
Power consumption Approx 1VA
Control voltage on T11 24VDC
Control current Approx 40mA
Contacts 2 n/o safety-contacts
Maximum, switching voltage 250VAC
Switching capacity of contacts AC: 250V, 1500VA, 6A, DC: 24V, 30W, 1.25A
Minimum current (contacts) 24V, 20mA
Fuse external (contacts) 4A
Terminals Screw, maximum 2.5mm
2
Contact material AgCdo
Mechanical life 1 x 10 (7) switching operations
Electrical service life 1 x 10 (5) switching operations
Temperature range -15 +55˚C (DC) -15 to +40˚C (AC)
Conforms to VDE0113, part 1/06.93, EN60204-1:1992 EN954-1:1996
SR2C/03/03
Emergency Stop Relay (type 4) SR2C
Extremely compact universal emergency stop relay. Designed to be
used in safety-circuits in accordance with EN60204-1
❚ Operating voltage 24VDC to 230VAC
❚ Compact housing 22.5mm
❚ Force-guided contacts
❚ Self monitoring with redundancy
❚ One or two channel emergency stop circuit
❚ Cross short-circuit monitoring
❚ Safety category 4 and stop category 0
❚ Conforms to EN60204-1, VDE0113-1, EN954-1
Specification
Dimensions (mm)
Description
The IMO safety relay SR2C is equipped with force-guided and
redundant relays (two safety relay contacts) enabling the SR2C to
interrupt quickly and safely the dangerous parts of the machine.
Additionally each ON/OFF cycle ensures an automatic functional
monitoring, which ensures that if a safety circuit failure occurs NO
switching ON is impossible (self-monitoring).
Applications include one and two channel emergency stop and two channel
safety guard monitoring. A single-fault occurrence does not lead to the loss of
the safety function. It will be recognised at or before the next requirement of
the safety function. The SR2C satisfies stop category 0 EN60204-1 and type 4
safety category of EN954-1.
Y
E
A
R
G
U
A
R
A
N
T
E
E
22.5
114
99
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Emergency Stop Relay (type 4) SR2C
continued
SR2C/03/03
Wiring connections
Two channel emergency stop with cross
short-circuit monitoring and shorting to
ground
To activate the cross-circuit monitoring T11
and T14 must be connected. The emergency
stop button will be looped in lines T11-T12
and T10-T13, ON and RESET will be
connected between T12 and T21. To activate
the detection of shorting to ground T10 needs
to be connected with PE. After connecting the
power supply to A1 and A2 the safety
contacts can be actuated via the ON button.
One channel emergency stop
In accordance with EN954-1, the SR2C can
be used as an emergency stop relay with a
single-channel push button. For this purpose
T10 and T13 as well as T12 and T14 need to
be connected. The one channel emergency
stop button is looped in line between T11T12/T14. Ground shorting is available in this
application if T10 is connected with PE.
Two channel safety guard monitoring with
cross short circuit and ground monitoring
This application conforms to the two channel
emergency stop standard, however the
emergency stop button is replaced by two
limit switches, which monitor the guard door.
At least one of the limit switches should be
positive force opening (see IMO Safety Limit
Switches).
Emergency stop
Emergency stop
On
A1
only 24V
only 24V
only 24V
only 24V
only 24V
only 24V
T11
T21
T12
T13
13
23
14
Relay control and error
monitoring incl. aux relay K1
Relay control and error
monitoring incl. aux relay K1
K1
K2
+
T14
24
A2
T10
Safety guard closed
On
A1
T11
T21
T12
T13
13
23
14
24
K1
T14
K2
A2
T10
On
A1
T11
T21
T12
T13
13
23
T10
Relay control and error
monitoring incl. aux relay K1
K1
K2
T14
14
24
A2
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