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ABB 1SVR740750R0400 Control Relay 

1. Key Parameters

• Product Model: 1SVR740750R0400
• Order Code: 1SVR740750R0400
• Product Series: ABB 1SVR Series General-Purpose Control Relays
• Core Function: Amplifies low-power control signals to switch high-power loads; provides electrical isolation between control circuits and load circuits; enables logic control in automation systems; supports remote switching via PLC or manual signals
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Coil Voltage (Uc)	AC 230V ±10% (50Hz/60Hz auto-adaptive)	Compatible with standard industrial AC control circuits
  Coil Power Consumption	3VA (at 230V AC)	Low power draw reduces energy waste in control panels
  Contact Configuration	4PDT (4 Pole Double Throw): 4NO (Normally Open) + 4NC (Normally Closed)	Versatile for complex control logic (e.g., interlocks, signal inversion)
  Rated Insulation Voltage (Ui)	690V AC	Suitable for medium-voltage auxiliary circuits
  Rated Operational Voltage (Ue)	250V AC (resistive load); 30V DC (inductive load)	Matches common industrial load voltages
  Rated Operational Current (Ie)	10A AC (resistive, cosφ=1); 2A AC (inductive, cosφ=0.4)	Handles small to medium loads without external contactors
  Making Capacity	100A (peak, AC 250V)	Withstands inrush current during load startup
  Breaking Capacity	5A (AC 250V, cosφ=0.7); 0.5A (DC 30V, L/R=40ms)	Reliable breaking of inductive/capacitive loads
  Electrical Life	100,000 operations (at rated load)	Ensures long-term reliability in frequent-switching scenarios

• Mechanical Specifications:
  • Housing Material: Flame-retardant thermoplastic (UL94 V-0); high-impact resistance
  • Dimensions (W×H×D): 22.5mm × 78mm × 55mm (DIN rail-mountable, compact for dense control panels)
  • Mounting: DIN rail-mounted (35mm standard rail, TS 35/7.5); snap-on installation (no tools required)
  • Weight: Approximately 85g
  • Mechanical Life: 10,000,000 operations (no-load) | Withstands extreme cycling in high-duty applications |
  • Indicator: LED (red) for coil energization status | Provides visual confirmation of relay operation |
• Environmental Ratings:
  • Operating Temperature Range: -5℃~+55℃ (23℉~131℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for damp industrial areas)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; no contact bounce)
  • Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27; maintains contact alignment)
• Compliance Standards: IEC 60947-5-1 (low-voltage switchgear), EN 61000-6-2 (EMC immunity), UL 508 (industrial control equipment), CE, RoHS

2. Key Features

• Versatile 4PDT Contact Configuration: 4NO + 4NC contacts provide flexible switching options for complex control logic (e.g., "start/stop" interlocks, signal inversion, or parallel load control)—eliminates the need for multiple single-pole relays in crowded control panels.
• High Current Handling: 10A resistive load capacity enables direct control of small to medium loads (e.g., 230V AC contactor coils, 30V DC solenoid valves) without external amplification—simplifies control circuit design and reduces component count.
• Compact DIN Rail Design: 22.5mm width and lightweight (85g) maximize space efficiency in DIN rail-mounted control panels—ideal for space-constrained applications (e.g., machine tool control cabinets, mobile equipment).
• LED Status Indication: Integrated red LED provides instant visual confirmation of coil energization—speeds up troubleshooting (e.g., distinguishing between control signal faults and relay malfunctions).
• Flame-Retardant Housing: UL94 V-0 rated thermoplastic housing resists combustion during internal arcing (e.g., from contact bounce)—enhances safety in control panels with multiple electrical components.
• Wide Voltage Compatibility: AC 230V ±10% coil voltage with 50Hz/60Hz auto-adaptation works with global industrial grids—simplifies international project procurement and reduces inventory complexity.

3. Application Fields

• Industrial Machine Control: Primary application—load switching in machinery circuits:
  • CNC Machine Tools: Switches 230V AC cooling pump motors and lubrication system solenoids; 4NO contacts control active components, while 4NC contacts trigger alarm circuits during faults—integrates with ABB AC500 PLCs for precise timing control.
  • Packaging Equipment: Controls conveyor belt motors and sealing heaters; 4PDT configuration enables "forward/reverse" logic via NO/NC contacts, ensuring synchronized operation of packaging stages (e.g., filling, sealing, labeling).
• Automation System Interfacing: Bridges low-power and high-power circuits:
  • PLC Output Amplification: Converts AC500 PLC low-power outputs (e.g., 24V DC) into 230V AC switching signals for contactors; electrical isolation (690V Ui) prevents noise from load circuits interfering with PLC signals.
  • Sensor-Triggered Control: Activated by photoelectric sensor signals (via PLC) to switch sorting gates in logistics conveyors; 10A current capacity directly controls gate solenoids, reducing response time to <50ms.
• Building & Infrastructure Control: Manages auxiliary systems in commercial facilities:
  • HVAC Auxiliaries: Controls fan coil units and damper actuators in building HVAC systems; NC contacts monitor "fault" status of actuators, alerting BMS (Building Management System) to jams or failures.
  • Pump Station Control: Switches 230V AC booster pump motors in residential water systems; 4NO contacts handle pump operation, while NC contacts activate pressure alarms if pumps fail to start.

The structure and details of the product：

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