Product Summary
The 1734-IB4 is a compact, four-channel digital DC sinking input module. It belongs to the Allen-Bradley POINT I/O family. This module reads 24VDC signals from sensors and switches. It integrates seamlessly into a distributed I/O architecture for PLC-based control systems.
Expert Technical Evaluation & Performance Review
The 1734-IB4 provides four sinking input channels for 24VDC field devices. Each channel accepts a voltage range from 10V DC up to 28.8V DC. The nominal on-state current is 4 mA, with a maximum of 5 mA. This ensures reliable detection of standard industrial sensor signals.
The module features a user-selectable input filter time. This filter ranges from 0.5 ms hardware to 63 ms software selectable. Engineers can adjust this to eliminate signal noise. This capability provides robust performance in electrically harsh environments.
Power management is highly efficient for this component. The module dissipates only 1 Watt of power. It draws a maximum POINTBus current of 75 mA at 5V DC. This low power consumption reduces heat buildup within the control panel, enhancing system longevity.
The field power supply offers a continuous isolation voltage of 50V. This isolation protects the backplane and controller from power surges. The nominal input impedance is 3.6 kΩ. This impedance allows the module to interface correctly with 2-wire and 3-wire sensor configurations.
Step-by-Step User & Installation Guide
Begin installation by securing a zinc-plated steel DIN rail. Do not use aluminum or plastic rails. These materials can corrode and cause poor grounding. Attach the rail to the mounting surface every 200 mm using appropriate anchors.
Mount the 1734-IB4 onto the DIN rail. Ensure the keyswitch is in position 1 before snapping it into place. This prevents incorrect module insertion. The module dimensions are 56 x 12 x 75.5 mm, so it saves significant panel space.
Wire all field inputs to the removable terminal block (RTB). This block is located at the bottom of the module. Connect your 24VDC sinking sensors to the designated input terminals. Check that the on-state voltage stays between 10V and 28.8V DC.
Verify the module's status after powering the system. The front panel provides four yellow input status LEDs. It also shows module and network status indicators. These LEDs quickly confirm if an input signal is active and if the device communicates correctly.
Configure the input filter time within your control software. You can set the filter from 0.5 ms to 63 ms. Use a lower value for fast sensors like proximity switches. Use a higher value to debounce mechanical contact signals.
