JSBT4 Safety Relay
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Technical Data
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Manufacturer.................................. JOKAB SAFETY
Ordering Data............... JSBT4 and supply voltage
Color................................................. black and beige
Weight......... 350 g (24 VDC), 460 g (24-230 VAC)
Supply.......... 24 VDC+/-15%, 24/48/115/230 VAC,
+/-15%, 50-60 Hz
Power Consumption....................................... <2 VA
Relay Outputs....................................... 3 NO + 1 NC
Maximum switching
capacity res. load AC............ 6A/250 VAC/1500 VA
Maximum switching
capacity res. load DC................. 6A/24 VDC/150 W
Minimum load.......................................... 10mA/10 V
(if load on contact has not exceeded 100 mA)
Maximum input wire
res. at nom. voltage................................... 300 Ohm
(S13-S14 and S23-S24)
Response Time
At deactivation...... <15 ms (145 ms with switched
supply/power loss)
Terminals
Maximum screw torque................................... 1 Nm
Single strand......................... 1x4mm2/2x1.5mm2
Conductor
with socket contact............... 1x2.5mm2/2x1mm2
Air and creep distance............. 4kV/2 IEC 60664-1
Mounting.......................................... 35 mm DIN rail
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Operating Temperature
Range................................................ -10ºC to +55ºC
Function Indication...................... Electrical supply,
inputs, outputs
Protection Class
Enclosure........................................ IP 40 IEC 60529
Connection blocks......................... IP 20 IEC 60529
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Technical Description
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The electrical supply is connected across A1 and A2. After Voltage reduction and Rectification (AC-versions) or reverse polarization protection (DC-version) there is an overload protection-circuit.
When the inputs S13-S14 and S23- S24 are closed within 0.5 seconds the relays K1 and K2 are energized . A dual stop signal is given, K1 and K2 de-energize, when there is a short circuit between or an opening of the inputs and at power loss. If one input is opened the other one also has be opened in order to activate K1 and K2 again. The test circuit, X1- X2, has to be closed in order to activate the outputs, thereafter the test circuit can be opened or closed continuously. If the test circuit is closed after the inputs there is no requirement to close them within 0.5 seconds.
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The internal supervision circuit monitors the two Inputs and relays K1, K2. The stop function then fulfils the requirement that one failure (short circuit, component, external disturbance) shall not prevent the safe function of the JSBT4.
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.
The NC output 41-42 should only be used for monitoring purpose e.g. Indication lamp or PLC input, etc. The output contacts are closed until the module is reset.
Note: Output 41-42 is intended for the indication purposes only, e.g. gate opened. No load between S14 and S24 allowed.
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Electrical Connections
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Emergency stop with automatic resetting.
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Enabling device JSHD4. Stop condition is given in both top and bottom PB positions.
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Monitoring to ensure that the On button cannot stick in pressed position. Short circuiting over the closing contact is not monitored. JSBR3 and JSBR4 have built in short circuiting monitored resetting.
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Contact mat or strip with automatic reset.
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Interlocked hatch with automatic resetting.
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Control and supervision of external contactors, relay, valve or JOKAB SAFETY’s expansion relays.
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