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Jokab JSBR4 Safety Relay Specifications:
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Product Type: Safety Relay
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Manufacturer: ABB Jokab Safety
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Model: JSBR4
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Device Application: Monitoring of two-hand devices (type IIIc), emergency stops, interlocked gates/hatches, contact strips, safety mats, foot-operated switches
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Article Numbers / Ordering Data:
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Supply Voltage: 24 V DC,
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Power Consumption: 1.3 W (DC)
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Inputs: 2 dual-channel inputs (S13-S14, S23-S24), both must be closed to activate safety outputs
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Input Characteristics:
- Short-circuit across inputs causes output contacts to open
- Continuous short-circuit tolerant without relay damage
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Reset Function: Manual supervised reset (close and open reset input X2 to prevent unintentional reset)
- Reset input monitors contactors/valves for return to initial position
- Prevents reset if reset button is jammed or short-circuited
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Two-Hand Device Operation: Both buttons must be pressed within 0.5 s to close outputs
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Safety Outputs: 3 N/O (normally open) contacts (13-14, 23-24, 33-34, internally series-connected)
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Auxiliary Output: 1 N/C (normally closed) contact (41-42, for indication only, e.g., gate opened)
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Contact Rating:
- Max. Switching Capacity: 6 A at 250 V AC, 1500 VA
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Max. Breaking Capacity: Not specified (confirm with supplier; typically matches contact rating)
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Safety Level:
- Category 4 / PL e (EN 954-1 / EN ISO 13849-1)
- SIL 3 (EN 61508, assumed based on similar ABB Jokab relays)
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Response Time:
- Stop signal: Immediate upon short-circuit, input opening, or power failure
- Reset activation: Requires reset input to close and open
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Connection Type: Screw terminals
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Mounting: DIN rail (35 mm)
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Housing Material: Plastic (black and beige)
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IP Degree of Protection: IP20 (terminals), IP40 (housing, typical for safety relays)
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LED Indication:
- Power supply: “On” LED
- Inputs: “In” LED (on when inputs S13-S14, S23-S24 are closed)
- Outputs: “Out” LED (on when safety outputs are closed)
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Ambient Air Temperature for Operation: -10 to 55 °C
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Ambient Air Temperature for Storage: -40 to 70 °C
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Standards Compliance: EN 954-1, EN ISO 13849-1, EN 60204-1
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Product Certifications: CE, TÜV, UL (based on similar ABB Jokab Safety products)
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Special Features:
- Dual supervised safety function (no dangerous function on component failure, short-circuit, or external disturbance)
- Robust design tolerates continuous short-circuits without damage
- Suitable for safety mats/strips (stop on short-circuit between channels A and B)
- Test input for monitoring contactors/valves
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Dimensions:
- Width: 45 mm
- Height: 120 mm
- Depth: 120 mm
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Weight: 0,35 kg
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HS Code: 8536.49.00
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Country of Origin: Sweden
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