Siemens 3RA711 Serie Instrucciones De Servicio página 2

Load feeder with integrated
safety technology
Instructions
!
WARNING
HAZARDOUS VOLTAGE.
Can cause electrical shock
and burns.
Disconnect power before proceeding
with any work on this equipment.
The devices must be installed in a switchgear cabinet with the IP32, IP43 or
IP54 degree of protection, depending on the ambient conditions.
IMPORTANT NOTICE
The products described herein are designed to be components of a customized
machinery safety-oriented control system. A complete safety-oriented system
may include safety sensors, evaluators, actuators and signaling components. It
is the responsibility of each company to conduct its own evaluation of the effec-
tiveness of the safety system by trained individuals. Siemens AG, its subsidiar-
ies and affiliates (collectively "Siemens") are not in a position to evaluate all of
the characteristics of a given machine or product or machine not designed by
Siemens.
Siemens accepts no liability for any recommendation that may be implied or
stated herein. The warranty contained in the contract of sale by Siemens is the
sole warranty of Siemens. Any statements contained herein do not create new
warranties or modify existing ones.
Application
The 3RA711. load feeders with integrated safety technology can be used in
EMERGENCY STOP devices in accordance with EN 418 and in safety circuits in
accordance with EN 60 204-1 (11.98), for example for mobile guards or protec-
tive doors. Safety category 4 in accordance with DIN EN 954-1 or SIL3 in accor-
dance with IEC 61508 is stipulated, depending on the external connections.
Functions and connections
The 3RA7111 and 3RA7112 safe load feeders consist of an adapter for rail
mounting with integrated safety-oriented electronics, a circuit-breaker and two
series-connected contactors.
This combination forms a complete load feeder, wired and certified in the fac-
tory, which complies with type of coordination 1 or 2.
The 3RA7110 load feeders without a circuit-breaker are used for separate or
fused mounting.
The load feeder has a safe solid-state output, a safe input for cascading and an
input for operational switching. Three front-mounted LEDs indicate the operat-
ing state.
When the device is put into operation it runs through a self-test to test the cor-
rect functioning of the internal electronics.
All internal circuit components are monitored for faults cyclically during opera-
tion. Expansion units such as 3TK2830/56/57 or 3RA711/2/3/4 or external actu-
ators or loads can be switched via safe output 2. Cascading with the 3TK2841/
42/45/53 or 3RA711 devices is also possible via safe output 2. One-channel cas-
cading is only allowed inside a switch cabinet for Cat. 3/4. It must be ensured that
the actuator / load and the 3RA711. load feeder have the same frame potential.
Details of the external connections of the load feeders should be taken from the
application examples in Fig. IV to Fig. X.
Use a power pack to IEC 60536 safety class III (SELV or PELV)
for power supply!
Terminal Operating A1
assignments voltage A2
Sensors Y11, Y12
Y21, Y22
Y35
Y32
Y33, Y34
Outputs L1/T1, L2/T2, L3/T3
Inputs 1
3
4
Output 2
2
Cable lengths for 2 x 1.5 mm
Line capacitance
2
L+
M
Channel 1 EMERGENCY STOP or position switch
Channel 2 EMERGENCY STOP or position switch
With / without cross-circuit detection
Autostart changeover switch
ON button, RF circuit
main circuits
Cascading input
Supply for external switches
Input for operational switching
Safe solid-state output 24V DC / 1A
max. 2000 m (total cable length for sensors)
Max. 4.7 µF to M (sensors)
Order No.: 3ZX1012-0RA70-2AA1
Figures
Fig. I / II: Dimension drawings (dimensions in mm)
Fig. III: Internal connections: ¿ power supply unit, À sensor evaluation, Á driver
for contactors, Â power section, Ã cascading input, Ä terminals for
operational switching, Å safe solid-state output
Fig. IV: Protective-door monitoring, two-channel, autostart Cat. 4 / SIL3
Fig. V: Protective-door monitoring, single-channel, autostart Cat. 2 / SIL1
Fig. VI: EMERGENCY STOP, two-channel, with additional ON button Cat. 4 / SIL3
Fig. VII: EMERGENCY STOP, single-channel, with additional ON button Cat. 2 / SIL1
Fig. VIII: Light barrier/array, two-channel, autostart, Cat. 4 / SIL3
Fig. IX: EMERGENCY STOP and protective door, two-channel, in cascade for
Cat. 4 / SIL3
Fig. X: a: without operational activation
b: with floating contact operationally activated
c: with non-floating contact operationally activated
Fig. XI: Connections for main circuit
Operating states
LEDs Operation
POWER RUN FAULT EMERGENCY
STOP
Not
actuated
Actuated
Not actuated
on startup self-test approx. 7 sec.
Faults
• Electronic defect
• Change in terminal assign-
flashes
ment during operation
• Short-circuit to L+
Contactor welded
No supply voltage
Technical data / auxiliary circuit
Permissible ambient temperature T
Operation/storage
Degree of protection to EN 60 529
Rated insulation voltage U
i
Rated impulse withstand voltage U
Rated control supply voltage U
s
1)
Rated power
Operating range
Shock resistance
2)
Weight
Recovery time after EMERGENCY STOP
Recovery time after power failure
Release time (EMERGENCY STOP)
3)
Release time (power failure)
4)
Response time
Start signal Y34
Process response time
Manual testing (intermittent operation)
Technical data / main circuit
Depends on the power section
1)
Only safety electronics, power loss of the power section must be added.
2)
Depends on the power section.
3)
Opening delay of the contactors must be added.
4)
Closing delay of the contactors must be added.
For further data and accessories see Catalog.
Reliable functioning of the equipment is only ensured with certified components.
3RA711.
IEC 60 439-1 (08.00)
ON button Outputs Cause
Actuated on Normal operation
once
No off EMERGENCY STOP
function (protective door)
actuated
Not actuated off Outputs deenergized;
press ON button to
start
off
off
u
–20 to +60 °C/–40 to +80 °C
IP20
690 V
6 kV
imp
24 V DC
2 W
0.9 to 1.1 x U
s
5 g/11 ms
max. 1.2 kg
typically 400 ms
7 s
3)
typically 25 ms
max. 100 ms
typically 400 ms
pulse (min.200 ms / max. 5 s)
180 ms
6 months
English