SCR-4-TD

Safety monitoring relay with combined Time Delay IDEM SCR-4-TD.

The SCR-4-TD Range of all purpose Safety Monitoring Relays combine time delayed and non time delayed contacts in a compact 22.5mm housing.

This permits dangerous components of a system to be switched off quickly and safely, whilst at the same time other circuits are still supplied with voltage for up to 30 seconds (adjustable on the SCR-4-TD by a potentiometer).

Features:

• Force guided safety output contacts - available in 3 variants
• Standards: EN60204-1, ISO13849-1, EN62061
• Single or Dual Channel input with LED indication of input status.
• Redundancy and cycle monitoring.
• Feedback loop for monitoring contacts or expansion modules.
• Short circuit and earth fault monitoring.
• 22.5mm Din Rail Mounting.

Specification:

Standards:

• EN60204-1
• ISO13849-1:
• Performance Level: e
• Category (ISO13849-1): Non Delayed: 4; Delayed: 3
• MTTFd: 73.36 years
• DC (average): 99% Delayed: 90%
• Proof Test Interval (Life): 10 years
• Safety Data Annual Usage: 261 days per year/16 hours per day; Test cycle 180 seconds/cycle; Low load AC1
• EN62061:
• SILCL: Non Delayed: 3
• Proof Test Interval (life): 20 years
• Hardware Fault Tolerance: 1
• DC (average): 99% Delayed: 90%
• PFHd: 4.22 x 10-8
• PFHd: Delayed: 8.84 x 10-8

Safety Classification and Reliability Data:

• Monitored Safety Inputs Circuits: 2NC or 1NC
• Safety Switching Outputs: 4NC
• Delayed Time: 1-30 seconds continuously adjustable
• Operating Voltage: 24Vac/dc
• Supply Deviation: +/-10%
• Control Voltage at S11: 24Vdc
• Control Current S11 to S14: 190mA approx.
• Monitored Reset Circuit Loop: Auto or Monitored Manual Reset
• Maximum Line Conductor Cross Section: 2.5 sq mm
• Maximum Length of Control Line: 1000m with 0.75 sq mm
• Contact Material: AgNi
• Indication - Green:
• LED1 internal relay K1 energised
• LED2 internal relay K2 energised
• LED1 and LED2 OSSD closed
• Contact Service Life: Mechanical 1x107; Electrical 1x105
• Safety Contact Breaking Capacity:
• AC: 250V, 1500VA, 6A, ohmic; 230V, 4A for AC15
• DC: 24V, 30W, 1.25A, ohmic; 24V, 30W, 2.0A for DC-13
• External Fuse Protection - Safety Outputs: 4A slow blow or 6A quick blow
• Minimum Voltage and Current: 24V, 20mA dc
• Response Time on Output Opening: 90ms
• Rated Insulation Voltage: 250V
• Protection: IP20
• Rated Impulse Withstand Voltage: 4kV
• Operating Temperature: -15°C ~ 40°C
• Mounting: 22.5mm DIN rail
• Weight: 250g approx.

Warranty: 36 months

Ordering Information:

• SCR-4-TD-1 180005 - Terminal type: Standard Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 3NC; Delayed output contacts: 1NC
• SCR-4-TD-1 180006 - Terminal type: Standard Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 2NC; Delayed output contacts: 2NC
• SCR-4-TD-1 180007 - Terminal type: Standard Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 1NC; Delayed output contacts: 3NC
• SCR-4-TD-1 180005-P - Terminal type: Pluggable Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 3NC; Delayed output contacts: 1NC
• SCR-4-TD-1 180006-P - Terminal type: Pluggable Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 2NC; Delayed output contacts: 2NC
• SCR-4-TD-1 180007-P - Terminal type: Pluggable Screw Terminals; Supply voltage: 24VAC/VDC; Switch input circuits: 2NC; Instant output contacts: 1NC; Delayed output contacts: 3NC