Product Overview
The Allen-Bradley 1734-IB4D is a compact digital DC sinking input module from the POINT I/O series. It features four input channels, each with a status indicator light, making it easy to monitor input states at a glance. Designed for industrial environments, this module delivers reliable performance in a space-saving form factor, simplifying installation and maintenance.
Key Features & Benefits
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Diagnostics: Built-in diagnostics help identify wiring and field device issues, reducing downtime.
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Compact Design: Small footprint allows high-density mounting, saving cabinet space.
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Status Indicators: Per-channel LEDs provide immediate visual feedback for troubleshooting.
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Flexible Mounting: Can be mounted horizontally or vertically, accommodating various enclosure layouts.
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Open-Style Enclosure: Facilitates heat dissipation and simplifies wiring access.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1734-IB4D |
| Series |
POINT I/O |
| Module Type |
Digital DC Sinking Input Module |
| Number of Inputs |
4 |
| Input Voltage |
24 Volts DC |
| Input Current (max) |
5 milliamps |
| POINTBus Current |
50 milliamps |
| Power Dissipation |
1.9 BTU/hour |
| Maximum Thermal Dissipation |
3.4 BTU/hour at 28.8 VDC |
| Weight |
1.14 oz (approx.) |
| Dimensions (H x W x D) |
2.2 x 0.47 x 2.97 inches |
| Operating Temperature |
-20 to 55 °C (-4 to 131 °F) |
| Enclosure Type |
Open-style |
| Mounting Orientation |
Horizontal or vertical |
| Terminal Base Screw Torque |
0.8 N-m (7 lb-in) |
| Max POINTBus Current at 5 VDC |
75 mA |
| Maximum Power Dissipation at 28.8 VDC |
1.0 Watt |
| Keyswitch Position |
1 |
| Network Compatibility |
ControlNet, DeviceNet, EtherNet/IP, other open networks |
Industry Applications
The 1734-IB4D is well suited for discrete control applications across manufacturing, packaging, material handling, and process industries. Its sinking input configuration and diagnostic capabilities make it ideal for monitoring limit switches, proximity sensors, and pushbutton states. For example, in a packaging line, the module can reliably detect product presence and trigger downstream actions, while its diagnostics help pinpoint faulty sensors quickly.
Installation & Setup
Mount the 1734-IB4D onto a POINT I/O mounting base and secure it with the terminal base screw to the specified torque (0.8 N-m). The module fits into any POINT I/O chassis and connects to the network via the bus. Wire field devices to the removable terminal block (RTB), ensuring correct polarity for sinking inputs. The compact size allows for dense mounting, and the module can be oriented horizontally or vertically to suit your enclosure layout. Always verify the input voltage (24 VDC) and current limits before energizing.
Maintenance & Reliability
Routine inspection of the 1734-IB4D includes checking for loose wiring, verifying that status LEDs illuminate correctly, and ensuring the enclosure remains free of dust and moisture. The module operates reliably within -20 to 55 °C, so maintain proper ventilation. Periodic diagnostics using the status indicators can help detect field wiring issues early, reducing unplanned downtime and maintenance costs.
Compatibility & Integration
The 1734-IB4D integrates seamlessly with Allen-Bradley POINT I/O systems and communicates over ControlNet, DeviceNet, EtherNet/IP, and other open networks. It works with Rockwell Automation controllers such as ControlLogix, CompactLogix, and MicroLogix when paired with the appropriate network adapter. This flexibility makes it easy to incorporate into new or existing control architectures.
Selection Guide & Purchasing Advice
Before purchasing, verify that the 1734-IB4D matches your system's network adapter and that your power supply provides 24 VDC. Ensure the mounting base and RTB are compatible with the module. For reliable sourcing and genuine parts, consider PLC Source PRO, a trusted supplier of industrial automation components.