Jokab Safety RT9 Catalog Page
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Safety relay
RT9
Approvals:
TÜV Nord
Safety relay for:
Emergency stops
Light curtains
Three position devices
Interlocked gates/hatches
Magnetic switches
Light beams
Safety mats
Contact strips
Foot operated switches
Would you like a small safety relay for all your safety
applications?
Then choose the compact RT9 universal relay to supervise both
your safety devices and the internal safety of your machinery. In
addition, you can select the safety level that is required for each
installation. All this is possible due to the RT9 offering the most
versatile input option arrangement available on the market. The
RT9 can therefore replace many other relays.
Other RT9 options include selection of either manual supervised
or automatic resetting. The manual supervised reset can be used
for gates and other safety devices that can be bypassed. Automatic
reset can be used for small safety hatches, if deemed acceptable
from risk assessment.
In addition, the RT9 has a double information output that will
indicate e.g if a gate is open or if the relay needs resetting.
The RT9 uses the latest component technology and modern assembly techniques to ensure a highly cost effective solution.
Choose the RT9 to simplify your safety circuits and reduce your
costs.
Features:
Five input options
Single or dual channel input
Manual supervised or automatic reset
Test input for supervision of
external contactors
Width 22.5 mm
LED indication of supply,
inputs and outputs, shortcircuit and low voltage level
2 NO relay outputs
One changeover relay with
a double information output
Supply 24 VDC
Quick release connector
blocks
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Technical information – RT9
Short circuit
protection
Automatic
fuse
Inputs
The RT9 can be configured to operate in either of the following
input options:
Single channel, 1 NO contact from +24VDC, 1. category 1,
up to PL c
Dual channel, 2 NO contacts from +24VDC, 2. category 3,
up to PL d
Dual channel, 1 NO, 1 NC contact from +24VDC, 3. category
4, up to PL e
Dual channel, 1 NO contact from 0V and 1 NO contact 4.
from +24VDC, category 4, up to PL e
Safety mat/contact strips, 1 ‘contact’ from 0V and 1 5.
‘contact’ +24VDC, category 3, up to PL d
When the input/inputs are activated and the test/supervised reset
is complete, relays 1 and 2 are energised. These are de-energised
when the input/inputs are de-activated in accordance with the
input option chosen or in case of a power failure.
Relays 1 and 2 must both be de-energized before the RT9 can
be reset.
Relay output status information
The RT9 has a changeover contact relay output that can be connected to a PLC, control lamp, computer or similar. The output
gives information about the status of the relay.
Indication of low voltage
The ‘On’ LED will flash if the relay supply voltage falls below an
acceptable level. This indication will also be given if a monitored
safety mat/contact strip is actuated. Please see Connection option 5.
Safety level
The RT9 has internal dual and supervised safety functions. Power
failure, an internal faulty component or external interference will
not present a risk to options with the highest safety level. A manual
reset requires that the reset input is closed and opened before
the safety relay outputs are activated. A short-circuit or a faulty
reset button is consequently supervised.
When the RT9 is configured for dual channel input, both the
inputs are supervised for correct operation before the unit can
be reset.
The input options 3 and 4 have the highest safety levels as all
short-circuits and power failures are supervised. This in combination with an internal current limitation makes the relay ideal for
supervision of safety mats and contact strips.
Regulations and standards
The RT9 is designed and approved in accordance with appropriate directives and standards. See technical data.
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2
3
4
5
Reset and testing
The RT9 has two reset options; manual and automatic. The manual
supervised reset can be used when the RT9 is monitoring safety
devices that can be bypassed, i.e. to ensure that the outputs of
the safety relay do not close just because a gate is closed. The
automatic reset option should only be used if appropriate from a
risk point of view.
Due to special internal circuits the RT9 can be automatically
reset regardless of the operational voltage rise time, this being
an important factor when large loads are started up on the same
power supplies at the same time.
In addition, the RT9 can also test (supervise), if for example,
contactors and valves etc are de-energised/de-activated before
a restart is made.
Connection of supply - RT9
DC supply
Connection examples
For examples of how our safety relays can solve various safety
problems, please see the section “Connection examples”.
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7
8
9
10
The RT9 should be supplied with +24 V on A1
and 0 V on A2.
NOTE
If cable shielding is used this must be connected
to an earth rail or an equivalent earth point.
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12
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