Product Overview
When upgrading your distributed I/O architecture, the Allen-Bradley 1734-IB4 Digital DC Sinking Input Module delivers reliable performance in a compact POINT I/O form factor. This module provides four sinking input channels operating at 12/24 VDC, making it ideal for replacing older, bulkier input modules or adding new digital inputs to existing control systems.
As part of the Rockwell Automation POINT I/O family, the 1734-IB4 mounts directly onto a DIN rail and works with any POINT I/O communication adapter. Its slim design (56 x 12 x 75.5 mm) saves valuable panel space while maintaining robust functionality. The module accepts 2-wire or 3-wire input signals and features a removable terminal block for easy wiring.
Technical Specifications
| Parameter |
Value |
| Inputs |
4 sinking channels |
| Input Voltage |
24 VDC (nominal), 10-28.8 VDC range |
| Input Current |
5 mA max (on-state) |
| POINTBus Current |
75 mA at 5 VDC |
| Power Dissipation |
1 W (3.4 BTU/hr thermal) |
| Input Filter Time |
0.5 ms hardware + 0…63 ms user-selectable |
| On-state Voltage |
10 VDC min, 24 VDC nominal, 28.8 VDC max |
| On-state Current |
2 mA min, 4 mA nominal, 5 mA max |
| Off-state Voltage |
5 VDC max |
| Off-state Current |
1.5 mA max |
| Input Impedance |
3.6 kΩ nominal, 4.7 kΩ max |
| Isolation Voltage |
50 V continuous |
| Weight |
31.8 g (1.12 oz) |
| Dimensions (H x W x D) |
56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in) |
| Enclosure Rating |
Open-style (none) |
Real-World Applications
The Allen-Bradley 1734-IB4 excels in applications requiring reliable 24 VDC digital input sensing. Typical uses include:
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Assembly line monitoring: Detect part presence or position for PLC-controlled machines.
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Conveyor system control: Interface with proximity sensors to track material flow.
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Packaging equipment: Read limit switches and pushbutton inputs for automated packaging lines.
Its fast input filter (0.5 ms hardware) ensures accurate detection even in high-speed processes. Upgrading from older I/O racks to POINT I/O reduces wiring complexity and simplifies maintenance.
Installation & Setup Guidance
Mount the 1734-IB4 on a zinc-plated, yellow chromate steel DIN rail. Avoid aluminum or plastic rails as they can cause poor grounding. Secure the rail every 200 mm (7.8 inches) with appropriate anchors. Connect the module to any POINT I/O communication adapter, which supplies 5 VDC bus power. Use the removable terminal block (RTB) at the bottom for field wiring. The keyswitch position 1 ensures correct orientation.
The front panel shows module status, network status, and input 0–3 indicators. For optimal noise immunity, keep input wiring away from high-voltage cables. The user-selectable input filter (0–63 ms) can be configured via software to debounce signals.
Selection Guide & Purchasing Advice
Before ordering, verify compatibility with your existing POINT I/O adapter and control network. The 1734-IB4 requires a 1734-series communication adapter. For replacement or upgrade projects, check that the input voltage range (10–28.8 VDC) matches your sensor supply. UBEST Automation stocks genuine Allen-Bradley 1734-IB4 modules with fast shipping and competitive pricing. Contact us at ubest101 to confirm availability or request a quote for bulk orders.