Overview
The Allen-Bradley 700-N400A1 is a Bulletin 700-N series industrial control relay engineered for dependable switching in general-purpose and motor control applications. With a rugged 4-pole configuration and 10-ampere contact rating, this relay provides the electrical isolation and switching capacity needed to interpose between PLC outputs and higher-power loads. The 120VAC coil (110V 50Hz / 120V 60Hz dual-rated) operates reliably in standard industrial control circuits.
Key Features
- 4-Pole (4PDT) Configuration: Four independently switched contact sets enable simultaneous control of multiple loads or circuits.
- 10-Amp Contact Rating at 300V AC: Suitable for general-purpose switching without auxiliary contactors for light to moderate duty cycles.
- Convertible Contact Cartridges: Contact configuration easily changes from normally open to normally closed, providing design flexibility without replacing the entire relay.
- Manual Override Capability: Electrically held design with manual override for test and maintenance operations.
- Status Indication: Easy-to-identify visual indication of relay state for troubleshooting and commissioning.
- UL and CSA Certified: cULus Listed to UL 508 and CSA C22.2 No. 14, meeting North American safety standards for industrial equipment.
Technical Specifications
- Part Number: 700-N400A1
- Series: Bulletin 700-N, Series C
- Poles / Contact Configuration: 4-Pole, Convertible N.O./N.C.
- Contact Rating: 10A maximum at 300V AC (50/60Hz)
- Coil Voltage: 110V AC 50Hz / 120V AC 60Hz
- Coil Power Consumption: Typical industrial relay (exact watts consult datasheet)
- Operating Temperature: Standard industrial range (typical −40°C to +60°C; verify with distributor for exact range)
- Control Type: Electrically held with manual override
- Connection: Standard screw terminals
- Certifications: UL 508, CSA C22.2 No. 14, cULus Listed
- Enclosure: Not required; open-base design
Typical Applications
The 700-N400A1 relay serves in a broad range of industrial control scenarios:
- Machine Tool Control: Energizing solenoid coils, pilot lights, and horn circuits on CNC and conventional machine tools.
- Motor Starter Interposing: Providing electrical isolation between low-voltage PLC logic outputs and 480V three-phase motor starters.
- Automation Panels: General-purpose switching for conveyor systems, packaging equipment, and process automation logic.
- Process Equipment: Controlling valve actuators, pump motors, heating elements, and alarm circuits in manufacturing and process environments.
- Signal Distribution: Routing pilot control signals across multiple sub-circuits or remote equipment locations.
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 700-N industrial control relay sockets and mounting bases
- Standard industrial 120VAC control circuit power supplies (110V 50Hz or 120V 60Hz)
- Motor starter control circuits and control transformers rated for 110/120V AC coil loads
- PLC output modules rated for relay coil drive (verify amperage rating)
- Automation panels and machine tool control systems requiring general-purpose switching
Replaces / Drop-In Replacement For
- Earlier versions of Bulletin 700-N relays with identical form factor and pin configuration
- Generic NEMA A-series 4-pole industrial relays rated for 10A at 300V (verify identical socket compatibility)
- Similar duty industrial relays in legacy machine tool and control system retrofits (field verification recommended)
Works With
- Allen-Bradley control systems and motor control centers (MCC) incorporating 700-N series logic
- Siemens S7-1200/1500 and S5 systems via standard relay interfacing
- Mitsubishi FX and Q-series PLCs through screw-terminal hardwired connections
- Omron and Schneider Electric control networks using standard 120VAC pilot logic
- EtherNet/IP and PROFINET systems at the field I/O level (through gateway modules)
- Studio 5000 and CompactLogix programmed logic interposing relay circuits
