1734-OW4 POINT I/O 4-Point Relay Output Module | Allen-Bradley

The Original New Allen-Bradley 1734-OW4 POINT I/O 4-Point Relay Output Module is a high-reliability digital output device designed for distributed I/O applications requiring galvanic isolation between control logic and field devices. Featuring four Form A (normally open) electromechanical relay outputs, this module provides robust switching capability for AC and DC loads up to 2A per channel. Engineered for demanding industrial environments, the isolated relay contacts protect sensitive PLC circuitry from voltage spikes and electrical noise common in factory automation settings.

Core Engineering Highlights:
4 Form A isolated electromechanical relay outputs | 2A contact rating @ 120V AC / 24V DC | 1500V AC channel-to-backplane isolation | 0.5W power dissipation | 80mA POINTBus current | –20°C to +55°C operating temperature | Keyswitch position: 1

Key Features:

• Original New Allen-Bradley 1734-OW4 module

• 4 isolated Form A (N.O.) electromechanical relay outputs

• Contact rating: 2A at 5-30V DC / 120-240V AC

• 1500V AC isolation voltage between channels and backplane

• 20ms maximum output delay time (ON to OFF)

• Removable Terminal Block (RTB) compatible with 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS

• DIN rail mounting, open-style enclosure

• Keyswitch position: 1

• Supports Removal and Insertion Under Power (RIUP) for online module replacement

• Modular design allows independent selection of I/O, termination style, and network interface

• Factory-sealed original packaging, sourced through verified distribution channels

Applications:

• Motor starter control and contactor actuation

• Solenoid valve switching

• Pilot light and alarm horn triggering

• Relay logic in factory automation systems

• Interfacing between PLC logic and AC/DC field devices requiring galvanic isolation

• Conveyor and material handling systems

• Packaging machinery control

Technical Specifications:

• Catalog Number: 1734-OW4

• Product Type: POINT I/O Relay Output Module

• Outputs: 4 Form A (N.O.) isolated electromechanical relays

• Contact Rating: 2A @ 5-30V DC / 120-240V AC

• Max Switching Voltage: 240V AC, 30V DC

• Output Delay (ON to OFF): 20ms max

• Contact Resistance (Initial): 30mΩ

• Off-State Leakage Current: 1.2mA max @ 240V AC

• POINTBus Current: 80-90mA @ 5V DC

• Power Dissipation: 0.5W max

• Thermal Dissipation: 1.7 BTU/hr

• Isolation Voltage: 1500V AC (tested @ 2550V DC for 60s)

• Switching Frequency: 1 operation/3s (0.3Hz @ rated load)

• Expected Electrical Life: 100,000 operations @ rated load

• Keyswitch Position: 1

• Terminal Base Compatibility: 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS

• Enclosure Type: Open-style (IP20)

• Wire Size: 0.25-2.5 mm² (22-14 AWG) solid or stranded copper

• Dimensions: Approx. 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in.)

• Weight: Approx. 0.1 kg (0.22 lbs)

• Mounting: DIN Rail

• Operating Temperature: –20°C to +55°C

• Storage Temperature: –40°C to +85°C

• North American Temperature Code: T4A

• IEC Temperature Code: T4

• UPC: 612598309849

• Certifications: CE, cULus, KC, RCM, UL, ATEX, IECEx, CCC, ABS, RINA

System Compatibility:

• Rockwell Automation 1734 POINT I/O communication adapters (EtherNet/IP, ControlNet, DeviceNet, PROFIBUS)

• POINT I/O backplane systems

• ControlLogix, CompactLogix, and GuardLogix controllers

• 1734-TB / 1734-TBS / 1734-TOP / 1734-TOPS terminal base assemblies

• Studio 5000 Logix Designer® application with Add-on Profiles

Related Products:

• 1734-TB – Terminal base for field wiring (screw type, 8-pin)

• 1734-TBS – Terminal base for field wiring (spring clamp, 8-pin)

• 1734-TOP – One-piece mounting base (screw type, 8-pin)

• 1734-TOPS – One-piece mounting base (spring clamp, 8-pin)

• 1734-AENTR – EtherNet/IP adapter for distributed POINT I/O systems

• 1734-OW2 – 2-point relay output module

• 1734-OX2 – 2-point Form C relay output module

• 1734-OB8 – 8-point digital output module (solid-state)

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley and POINT I/O are trademarks of Rockwell Automation.