JSR2A Expansion Relay
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Technical Data
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Manufacturer.................................. JOKAB SAFETY
Ordering Data.............. JSR2A and supply voltage
Color................................................. black and beige
Weight................................................................ 313 g
Supply A1 - A2................................. 24 VDC+/-15%
24/48/115/230 VAC +/-15%, 50-60Hz
Power Consumption.................................... < 2.5VA
Contact Material............... AgSnO2 + 2.0µ Au flash
Relay Outputs....................................... 4 NO + 1 NC
Maximum switching
capacity res. load AC........... 10A/250 VAC/1840 VA
Maximum switching
capacity res. load DC............... 10A/24 VDC/192 W
Maximum total
switching capacity...................... 26A distributed on
all contacts
Minimum load........................... 10mA/10 V/100mW
(if load on contact has not exceeded 100 mA)
Maximum input wire res. at nom. voltage
24 VDC/VAC............................................. 100 Ohm
48/115/230 VAC...................................... 200 Ohm
Mechanical Operational Life...... >107 operations
Response Time
At deactivation (input - output)..................... <25 ms
At activation (input - output).......................... <15 ms
Mounting........................................... 35 mm DIN rail
LED Indication
On  ...................................................Supply voltage
 1 2 ..................Output relays 1 and 2
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Note: The total switching capacity of the JSR2A
is 26A. The load on each single contact must not
exceed 10A. Minimum Switching requirement of
10mA is not valid after the contact has been
subjected to load currents exceeding 100mA.
Terminals (removable)
Maximum screw torque.................................... 1 Nm
Single strand........... 1x4mm2/2x1.5mm2/12AWG
Conductor
with socket contact............... 1x2.5mm2/2x1mm2
Air and creep distance............. 4kV/2 IEC 60664-1
Operating Temperature
Range..................................................-10ºC to +55ºC
Protection Class
Enclosure....................................... IP 40 IEC 60529
Connection blocks........................ IP 20 IEC 60529
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Technical Description
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The JSR2A has to be connected to a suitable safety relay in order to fulfill the necessary safety requirements (see Connection Examples). The safety relay controls and monitors the JSR2A unit. (The JSR2A can be connected for single or dual channel operation - see electrical connection diagrams below.) When the inputs to S14 and S24 close, internal relays K1 and K2 are activated. A stop signal is given, K1 and K2 drop, if the inputs are opened or during power failure.
To check that both the K1 and K2 relays drop during a stop signal they must be monitored. This is achieved by connecting X1 and X2 to the test or reset input on the safety relay which is expanded. K1 and K2 have mechanically positively guided contacts, therefore if one of the output contacts should stick closed then the relays contact in X1-X2 cannot be closed thus preventing a new ready signal being given to the safety relay.
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Electrical Connections
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One channel expansion of RT6 with JSR2A connected for manual reset.
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Dual channel expansion of RT6 with JSR2A connected for automatic reset.
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