Jokab Safety JSBR4 Catalog Page
Safety relay
JSBR4
Approvals:
TÜV Nord
Safety relay for:
Two-hand devices of type IIIc
Emergency stop
Three position devices
Interlocked Gates/Hatches
Contact strips
Safety mats
Foot operated switches
Features:
A universal relay for two-hand- and many other safety
devices
The JSBR4 has two inputs, which both have to be closed
to keep the safety output contacts closed. A short-circuit
across the inputs will cause the output contacts to open.
The inputs can however be subjected to a continuous
short-circuit without damaging the safety relay.
In order to make the safety outputs close the reset input
must be closed and opened. In this way an unintentional
reset is prevented in the case of a short-circuit in the reset
button cable or if the button gets jammed in the actuated
position. The reset input can also be used for test/supervision to ensure that contactors or valves have returned
to their initial off/stop position before a new start can be
allowed by the safety relay.
When the JSBR4 is used as a two-hand device relay,
both buttons have to be pressed within 0.5 seconds of
each other in order to close the outputs.
When the JSBR4 is used for Safety Mats and Safety
Strips the ”stop” condition is given following detection of a
short-circuit between input channels A and B. The safety
mat, safety strip or the relay will not be damaged by a continuous short-circuit. This also gives the advantage that if
there is a failure between the inputs in the installation, the
safety relay will not be damaged.
Safety level
The JSBR4 has a twin supervised safety function. Component failure, short-circuit or external disturbance (e.g.
loss of power supply) will not prevent the safe function
of the relay. This is valid both for the inputs A and B as
well as for the reset input. The JSBR4 operates at the
highest safety level for safety relays (PL e according to
EN ISO 13849-1).
Two channel with
concurrency requirement of
0,5 s
Supervised reset
Test input
Width 45 mm
LED indication for supply,
inputs and outputs
3 NO/1NC relay outputs
Supply 24 VDC, 24, 48, 115
or 230 VAC
Quick release connector
blocks
Regulations and standards
The JSBR4 is designed and approved in accordance with
appropriate directives and standards. See technical data.
The JSBR4 complies with the highest safety level for the
connection of a two-hand device of type IIIc in accordance
with EN 574.
Connection examples
For examples of how our safety relays can solve various safety
problems, please see the section “Connection examples”.
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www.jokabsafety.com
Technical data – JSBR4
mm
1 2 0
7 4
45
Manufacturer ABB AB/Jokab Safety, Sweden
Article number/Ordering data
24 DC 2TLJ010002R0000
24 AC 2TLJ010002R0200
115 AC 2TLJ010002R0400
230 AC 2TLJ010002R0500
Colour Black and beige
Power supply 24 VDC ± 15%
Power consumption 1,3 W/3,3 VA
Relay Outputs 3 NO + 1 NC
Max. switching capacity
Resistive load AC 6A/250 VAC/1500 VA
Inductive load AC AC15 240VAC 2A
Resistive load DC 6A/24 VDC /150 W
Inductive load DC DC13 24VDC 1A
Max. res. load total switching
capacity: 12A distributed on all contacts
Min. load 10mA /10 V (if load on contact has
Contact material Ag + Au flash
Fuses Output (External) 5A gL/gG
Conditional short-circuit current
(1 kA) 6A gG
Max. Input wire res. at nom.
voltage
Response time at deactivation < 20 ms (145 ms at power loss)
24/48/115/230 VAC ± 15%, 50 60 Hz
not exceeded 100 mA)
300 Ohm (S13 - S14 and S23 S24)
Terminals
(Max. screw torque 1 Nm)
Single strand: 1 x 2,5 mm2/2 x 1 mm2.
Conductor with socket contact: 1 x 4 mm2/2 x 1,5 mm2.
Mounting 35 mm DIN-rail
Protection class enclosure/
terminals IP 40/20 IEC 60529
Operating temperature range -10°C to +55°C (with no icing or
Impulse Withstand Voltage 2.5kV
Pollution Degree 2
Operating humidity range 35% to 85%
LED indication Electrical Supply, Inputs, Outputs
Weight 350 g (24 VDC),
Values
(With Proof test interval 1 year)
Conformity 2006/42/EC, 2006/95/EC,
condensation)
460 g (24-230 VAC)
Safety Category 4 according to
EN 954-1, PL e, SIL 3,
PFHd 1.35E-08
2004 /108/ EC
EN 954-1:1996, EN 62061:2005
EN ISO 13849-1:2008
Connector blocks are detachable
(without cables having to be
disconnected)
1
2
3
4
5
Technical description – JSBR4
Prot.
circ.
Reset & Supervision circ.
*
* Only for AC-supply
The electrical supply is connected across
A1 and A2. After Voltage reduction and
Rectification (AC-versions) or reverse polarity
protection (DC-version) there is an overload
protection-circuit.
When the inputs S13-S14 and S23-S24
have closed and the reset is made, the relays
K1 and K2 are activated.
A dual stop signal is given when K1 and
Electrical connection – JSBR4
K2 drop, due to short circuiting between
the inputs, opening of the inputs or power
failure. If one input is opened the other input
must also be opened for K1 and K2 to be
activated again.
The monitoring circuit checks K1 and K2 and
that the reset circuit to X2 is both closed and
opened before K1 and K2 are energized. Both
the stop and reset function therefore comply
with the requirement that a component fault,
short circuit or external interference do not
result in a dangerous function.
The safety outputs consist of contacts
from K1 and K2 connected internally in
series across terminals 13 - 14, 23 -24 and
33 - 34. These contacts are used to cut
the power to components which stop or
prevent hazardous movements/functions.
It is recommended that all switched loads
are adequately suppressed and/or fused in
order to provide additional protection for the
safety contacts.
Note: Output 41-42 is intended for indica-
tion purposes only, e.g. gate opened.
No load between S14 and S24 allowed.
6
7
8
9
10
Emergency stop with manual resetting.
Two hand device with buttons in separate
or same enclosure. Buttons to be pressed
in within 0.5 s of each other. Footpedal
switches can be connected in the same
configuration.
Interlocked gate with manual reset.
Enabling device, JSHD4. Stop condition is given in both top and bottom PB
positions.
www.jokabsafety.com
Contact mat/strip with manual reset.
Control and supervision of external conductor, relay, valve or ABB Jokab Safety’s
expansion relays.
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12
13
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