SCR-21-i

VIPER SCR-21-i Safety Relay with Added Diagnostics

The VIPER SCR-21-i safety monitoring relay with added diagnostics from IDEM had been designed and manufactured in the United Kingdom to meet the latest safety standards and offer enhanced LED diagnostics and simplified wiring.Applications include the monitoring of safety interlock switches (guard door monitoring), emergency stop devices and sensors.The SCR-21-i internal logic uses force guided relays to achieve cross monitoring, this ensures that a single fault does not lead to the loss of the safety function and that all faults are detected at or before the next safety demand.

Features:

• Outputs 2NC contacts and 1NO contact.
• Feedback circuit to monitor external contacts.
• Easy diagnosis of status via visual indication of LEDs.
• Up to PLe, SILCL 3, Category 4.
• Monitored manual or automatic start.
• Single and dual channel operation.
• Output expansion units available to increase number of outputs.

Specification:

• Rated operating voltage: 24V AC/DC
• Operating voltage tolerance: -15% - +10%
• Rated supply frequency: 50Hz – 60Hz
• Rated supply current: 75mA
• Power consumption: 24V AC/ DC 2W
• Rated output voltage: S11 24V DC
• Input current: S11..S14 100mA
• Response time: 100ms
• Release time 25ms
• Recovery time Approx.: 1s
• Output Circuits: Rated output voltage 250VAC
• Max. current per output 6A
• Max. total current all outputs: 8A
• Safety contact breaking Capacity: AC 250V, 1500V, 6A, Ohmic, 230V, 4A for AC-15, DC 24V, 30W, 1.25A, Ohmic, 24V, 30W, 2A, DC-13
• Minimum contact load: 10V 10mA
• Min. contact fuses: 4A Slow blow, 6A Fast blow
• Contact material: AgSnO2
• Contact service life: 10 x 106
• Rated impulse withstand voltage: 4kV
• Rated insulation voltage: 250V
• Degree of protection: IP
• Temperature range: -20C + 55C
• Degree of contamination: 2
• Overvoltage category: III
• Weight: 0.3kg
• Mounting: Any position

Certificates: ISO14119 EN60947-5-3 EN60204-1 ISO13849-1 EN62061 UL508

Warranty: 36 months

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