Download EN 60947-5-1（GB 14048.5）

1.Safety Precaution
◆Safety relays are critical components in all safety related control systems, for which the
proper functioning will be of great importance in maintaining the safety performance of the
safety related control system.Thus when designing safety related control system, one
must read this manual and component datasheet carefully to ensure the relay working
conditions unconformity with part specifications, and achieving desired performance.For
detailed information of component parameters and specifications, see chapter2;
◆The installation, inspection, dismounting of the safety relay and safety related control system
must always be performed by skilled persons specially trained for the task. All relevant
technical instructions and regulations must be strictly observed. The proper functioning of the
component rely on the proper installation. For detailed instruction of component installations,
see chapter 6;
◆The unit need to be mounted on standardized racks. SR4P3A1B24 is designed for 35mm DIN
rail;
◆Transport, storage and operating conditions should all conform to EN 60068-2-6(GB/
T 2423.10);
◆Never attempt to disassemble the unit for recovering purpose. There are no repairable or
adjustable parts inside unit cover. All product guarantee will be invalid for parts with seal or
cover purposely broken;
◆Additional protection measures required for applications for output contacts with capacitive
and inductive loads. Refer to component data sheet for detailed information;
◆When permitted, the safety function must be triggered at least once a month . If this is not
applicable, there need to be proper program for verifying the safety function.
The safety relay SR4P3A1B24 is designed capable of long terms stable work under
temperature up to 55℃, and withstand shor period excessive high temperature, but such
extreme working condition will undo ubtedly reduce reliability of the safety relay and
many other components as well. Thus we strongly recommend adding suitable cooling
fans orair conditioning apparatus to keep temperature inside electrical cabinet where the
component installed below 20℃ when there exists high capacity components that
generate heats, or any other factors that may reduce the efficiency of cooling. It is also
good manners to keep cabinet temperature monitored.
The Safety Relays SR4P3A1B24 is for used in:
◆ Emergency Stop circuits ;
◆ Safety circuits according to EN 60204-1.
4. Function Description
The relay SR4P3A1B24 provide a safety-oriented interruption of a safety circuit. When the
operating voltage is supplied, the LED "Power" is illuminated .The unit is ready for operation,
when the reset circuit S33-S34 is closed.
B
Voltage Tolerance
24V DC
-15... +10%
Power Consumption
Output Contacts
Max Switched AC:
3W
3N/O+1N/C
AC-15: 5A/250V
Max Switched DC:
DC-13: 6A/24V
Max Output Fuse:
4A T/ 6A F
Switch-on delay
Automatic reset
Manual reset
25ms
25ms
Delay-on De-energization
30ms
MAX.supply interruption before
De-energization
Standards
START
UNIT1
SR4P3A1B24
20ms
EN
EN
EN
EN
EN
60947-5-1（GB 14048.5）
61000-6-2（GB 17626.2）
61000-6-3（GB 17626.3）
ISO 13849-1（GB/T 16855.1）
60204-1 （GB 5226.1）
START
UNIT2
◆Input circuit closed (e.g. the emergency stop button is not pressed),see Fig.2:
Relay K1 and K2 energize and retain themselves. The status indicators for "CH1" and "CH2"
illuminate.The N/O(normal open)safety contacts will be （13-14/23-24/33-34）will be
closed, the auxiliary N/C(normal close) contact (31-32)opened.
◆Input circuit is opened (e.g. emergency stop is pressed ),see Fig.3:
Relays K1 and K2 de-energize. The status indicators for "CH1" and "CH2" go out .The N/O
safety contacts（13-14/23-24/33-34）will be opened , the auxiliary N/C contact (31-32) will
be closed.
S1
Climate Suitability
Operating Temperature
EN 60068-2-78
-10...+55℃
Max Wire Size
-40...+85℃
IP50
35mm DIN rail
0.2...2.5mm2
Torque setting for screw terminals
0.5Nm
Dimensions （mm）
96×22.5×116
Weight
330g
Storage Temperature
Enclosure Protection
Mounting
3. Unit Description
The Safety Relay SR4P3A1B24 can be operated with 24VDC.
Feature:
◆Relay outputs:3 safety contacts (N/O), 1 auxiliary contact (N/C);
◆Connections for Emergency Stop Button, Safety Gate Limit Switch and Reset Button;
◆Status indicators;
◆Feedback control loop for monitoring of external contactors/relays possible.
The relay complies with the following safety requirements:
◆The circuit is redundant with built-in self-monitoring;
◆The safety function remains effective in the case of a component failure;
◆The correct opening and closing of the safety function relays is tested automatically in each
on-off cycle.
9.Dimensions
35mm DIN
S11
S33
S33
7. Examples of practical application
In Fig.6-Fig.10 are connection examples for Emergency Stop wiring with automatic and
monitored manual reset. Safety gate control as well as contact expansion via externalcontactors.
When use "Automatic reset" the device starts automatically after loss of power.
You should prevent an unintended start-up by using external circuitry measures.
S1
41
S21
Safety Level:EN ISO 13849-1(up to Cat.4/PLe)
Safety Integrity Level:EN 62061 (conform SIL3)
10...55Hz
0.33mm
For a practical application of a safety relay, and when there seems to be any problems(frequent
open faults in safety circuit or failure in reset, for example), a maintainer must always keep clear
mind and take proper operation. He may act following instructions below:
◆Indicators(LED’s)
There are three indicators on the safety relay, one red, marked with "Power", two green,
marked with "CH1" and "CH2".LED "Power" is not illuminated if short-circuit or the supply
voltage is lost. Please check the supply voltage. "CH1" and "CH2" are not illuminated if the
safety relay pick-up failure. Please Disconnect S1 and S2, restart them or restart the power.
◆Earth fault
Supply voltage fails and the safety contacts are opened via an electronic fuse. Once the cause
of the fault has been removed and operating voltage is switched off, the unit will be ready
for operation after approximately 1minute.
◆Contact failure
In the case of welded contacts, no further activation is possible following an opening of the
input circuit.If these failures can not be excluded please replacement of the same type of
safety relay, or contact us.
Fig.1 Internal wiring diagram
13
23
33
S22
S21
S11
S33
41
13
23
33
42
14
24
34
S22
LOGIC UNIT
S34
S33
42
S3
Vibration to EN 60068-2-6
Frequency
Amplitude
◆Reset circuit:
-Automatic reset: Bridge S33-S34.
-Manual reset: Connect the reset button to S33-S34.
◆Input circuit:
-Two-channel: Connect N/C contacts from safety switch (e.g. Emergency-Stop) to S11-S33
and S21-S22.
◆Feedback control loop:
Connect external contactors/relays in series with reset circuit S33-S34.
The safety contacts （13-14/23-24/33-34） are activated (closed), the auxiliary contact
(41-42) is opened. The status indicators"CH1" and "CH2" are the illuminated. The unit is
ready for operation. If the input circuit is (41-42) opened, safety contacts
（13-14/23-24/33-34）are opened, and the auxiliary contact is closed. The status indicators
go out.
8. Faults diagnosis and Exclude
Reset
◆Close the input circuit；
◆For manual reset press the button between S33-S34.
LOGIC UNIT
Safety Category
Rlmax
lmax= Rl/km
Rlmax=Max. Total cable resistance
Rl/km=Cable resistance/km
◆Applications exceeding rated data and specifications listed in chapter 2 is strictly prohibited.
Instructions for component wiring: when a component is secured in the rack and ready for
wiring, operator need to observe following steps:
Connect the operating voltage to terminals "L+" and"L-".
2. Technical Data
TYPE
Operating Voltage UB
6. Operation
Important notifications:
◆To prevent a welding together of the contacts, a fuse (see technical data) will be required in
the output channel anytime when there may be risk of overcurrent(including normal working
conditions and any foreseeable fault conditions). Such fuse must be installed in the circuit in
series without any parts in parallel.
◆Calculate the Max.Cable length, runs Imax in the input circuit:
14
24
34
S34
S3
Fig.6 Two-channel input
circuit, manual reset
Fig.7 Dual-channel safety gate
control, manual reset
Fig.3 Input circuit is opened
Fig.2 Input circuit is closed
Fig.11 Dimensions（mm）
Fig.12 Orbital & Slot
10.Installation & Removal
a.The unit is designed for 35mm DIN rail, see Fig.12.
b. Safety relay installation method.
Gently press down, stuck in the track, see Fig.13.
If the unit is installed on a vertical mounting rail (35mm), ensure it is secured using a fixing
bracket such as end bracket.
For detailed information related with component installation and wiring, see chapter 7.
To replace a broken parts, the following procedure must be strictly observed:
◆Keep all documents and diagrams at hand for reference, otherwise record all wiring
connections to avoid wrong connection;
◆Cut off machine power supply to ensure no danger voltage inside the machine, except those
for service lighting and sockets for tools;
◆Loosen the locking screws, release the wires connected to all terminals;
◆Pull the reed to release the part from the rack, rotate the part to dismount it from the rack,see
Fig.14;
◆Mount a new part and connect the wires, check wiring before any power on function test.
Attention:When either of the input channels is opened ,the safety relay will be
deactivated, both input channels must be opened before a new reset process
may be initialized.
5. Operating Modes
◆Two-channel operation:
Redundancy in the input circuit. Earth faults in the emergency stop circuit and short across
the emergency stop push button are also detected.
◆Automatic reset :
Unit is active as soon as the input circuits are closed .See Fig.4.
◆Manual reset:
Unit is only active when a reset button has been pressed. Automatic activation following a
loss/return of supply voltage is thereby prevented. See Fig.5.
◆Increase in the number of available contacts by connection of external contactors/relays. See
Fig.9 and Fig10.
S11
S1
S2
S1
S33
S21
S22
LOGIC UNIT
S33
S34
S11
S33
S21
S22
:gate close
S34
Fig.5 Manual reset
Fig.13 Safety relay installation method
Fig.14 Removal of safety relay
:Switch activated
LOGIC UNIT
S33
Fig.9 Connection example for external
contactors/relays
(Single-channel automatic reset)
Note:
S2
S3
Fig.4 Automatic reset
Fig.8 Dual-channel safety gate
control, automatic reset
:gate open
Fig.10 Connection example for
external contactors/relays
(Single-channel can be
monitored manual reset)
S1/S2:Emergency Stop Button ,Safety
Gate Limit Switch
S3:Reset button
11.Decommissioning
The safety relay is an electrical product and may not deposit freely as harmless materials. It
must be treated as industrial wastes and dealt with complying with relevant laws and regulations.