1734-IK - POINT I/O 24V DC Incremental Encoder Module | Rockwell
MPN: 1734-IK ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
1734-IK Overview
An incremental encoder interface module is a specialized industrial automation I/O device that converts high-speed quadrature pulse trains from rotary or linear encoders into position, count, or frequency data readable by a programmable logic controller (PLC). Within the automation hierarchy, it sits between the field sensor (encoder) and the controller, belonging to the distributed I/O family: encoder module -> specialty I/O module -> POINT I/O system -> fieldbus adapter -> PLC backplane.
Key features of the 1734-IK include a single high-speed counter channel, 24-bit binary count reporting expressed in a 32-bit long word, operation from a 15-24V DC encoder supply, and a maximum POINTBus current draw of 160 mA. According to the Rockwell Automation user manual 1734-UM006, the module returns count or frequency values as a 24-bit binary number, enabling fine-resolution position feedback in motion and material-handling applications.
The module mounts on standard POINT I/O terminal bases (1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S) and communicates over the POINTBus backplane to a network adapter such as a 1734-AENT or 1734-ADN. Terminal base screw torque is specified at 0.6 Nm (7 lb-in). Maximum power dissipation is 1.5 W at rated load, corresponding to a maximum thermal dissipation of 5.1 BTU/hr. A conformal-coated variant, the 1734-IKK (Series C), offers identical specifications for harsh or condensing environments.
Typical applications include cut-to-length positioning on packaging lines, speed feedback from shaft-mounted incremental encoders on conveyors, and position tracking on rotary tables and Indexing stations.
Design consideration: verify encoder signal voltage compatibility before ordering, because the otherwise similar 1734-IJ is a 5V DC version while the 1734-IK accepts 15-24V DC encoders; mixing them causes input-stage damage or no counting.
This page synthesizes distributor pricing context, drop-in family alternatives, terminal-base compatibility, and practical integration notes not found in a single manufacturer document.
Drop-in alternatives for 1734-IK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
1734-IKK
✅ Drop-In📋 Reference alternative (not in catalog)
1734-IJ
✅ Drop-In📋 Reference alternative (not in catalog)
1734-IK Specifications (manufacturer-published)
| Product Type | POINT I/O 24V DC Incremental Encoder Module |
| Manufacturer Series | Allen-Bradley 1734 POINT I/O |
| Number of Encoder Channels | 1 |
| Number of Counters | 1 |
| Input Voltage Range | 15-24 V DC |
| Counter Resolution | 24-bit (0 to 16,777,215), reported in 32-bit long word |
| POINTBus Current, Max | 160 mA |
| Power Dissipation, Max | 1.5 W at rated load |
| Thermal Dissipation, Max | 5.1 BTU/hr |
| Terminal Base Compatibility | 1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S |
| Terminal Base Screw Torque | 0.6 Nm (7 lb-in) |
| Mounting | DIN rail via POINT I/O terminal base |
| Enclosure Style | Open style |
| Series | Series C |
| Conformal Coated Variant | 1734-IKK (suffix K, identical specifications) |
1734-IK Interfaces & Connectors
1734-IK exposes the following interfaces and connectors as published by the manufacturer: Power Input. Expansion header pinout, connector pin numbering, and electrical limits are defined in the manufacturer documentation.
| Power Input | 15-24 V DC |
Refer to the manufacturer documentation for the full expansion header pinout and connector pin numbering.
Power & Thermal Characteristics
| Power Input | 15-24 V DC |
| Power Consumption | 1.5 W at rated load |
Power input and thermal parameters for 1734-IK as published by the manufacturer.
Typical Applications
1734-IK is suitable for 6 applications: Conveyor Speed Feedback, Cut-to-Length Positioning, Rotary Table Indexing, Harsh Environment Encoder Counting, Material Handling Accumulation Tracking, Test Stand and Machine Retrofits.
Conveyor Speed Feedback
The 1734-IK interfaces a shaft-mounted incremental encoder on a conveyor drive to the PLC, converting pulse frequency into belt speed. Its single 24-bit counter (0 to 16,777,215 counts) resolves even slow belt movements precisely, while the 15-24V DC input accepts common industrial encoder output stages without external level shifting. Mounted on a 1734-TB terminal base next to other POINT I/O modules, it reports count and frequency over the POINTBus backplane to a network adapter, letting the controller trim drive speed in real time. With 1.5 W maximum dissipation and 160 mA POINTBus current, it adds modest load to the adapter budget, and its open-style DIN-rail housing suits standard control panels.
Recommended
Cut-to-Length Positioning
In cut-to-length machines, the 1734-IK counts pulses from an incremental encoder measuring material feed, enabling the controller to trigger the cutter at exact lengths. The 24-bit count range supports long feed lengths without rollover errors, and the module reports the count as a 32-bit long word so the PLC reads absolute position in one transfer. The 15-24V DC input tolerates voltage drop on long encoder cable runs common in packaging lines, where 5V signals would be marginal. Terminal connections on the 1734-TB3 base accept 0.6 Nm screw torque for vibration-secure field wiring. Because counting is performed in hardware on the module, pulse capture is independent of PLC scan time, an essential property for high-speed cutting accuracy.
Recommended
Rotary Table Indexing
For rotary table and indexing dial machines, the 1734-IK reads an incremental encoder mounted on the table shaft, giving the controller immediate position feedback for dwell and release timing. The single counter channel with 24-bit resolution provides fine angular resolution after gearbox ratio division, and hardware counting ensures no pulses are lost during rapid table rotation. The module plugs into the same terminal base family (1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S) as neighboring discrete and analog POINT I/O modules, keeping cabinet wiring uniform. At 160 mA maximum POINTBus current, several modules can share one adapter. Its 1.5 W dissipation (5.1 BTU/hr) poses no thermal concern in a typical enclosed panel.
Recommended
Harsh Environment Encoder Counting
In environments with condensation, dust, or light chemical exposure, the conformal-coated 1734-IKK variant provides the same 24V DC encoder counting function as the 1734-IK with a protective coating on the PCB. According to Rockwell Automation publication 1734-IN005, catalog numbers with the K suffix have specifications identical to non-coated versions, so control programs and terminal bases carry over unchanged. This makes the IKK the correct choice for washdown-adjacent areas, wastewater plants, and food-processing secondary zones where uncoated electronics corrode. The 15-24V DC input remains tolerant of moisture-induced leakage on field wiring, and screw terminals at 0.6 Nm torque maintain reliable connections despite vibration and thermal cycling.
Recommended
Material Handling Accumulation Tracking
Accumulation conveyors and diverters use incremental encoders to track product position between photo-eye events; the 1734-IK provides the pulse-counting front end. Its single counter runs continuously in hardware, and the controller reads the 32-bit count word on demand to compute product displacement, enabling accurate divert-gate firing without a full motion controller. The 15-24V DC input interfaces directly with rugged 24V industrial encoders standard on material handling equipment, avoiding fragile 5V signaling across long cable trays. PointBus current of 160 mA and 1.5 W dissipation allow dense module populations on one adapter. Replacement is toolless: modules unplug from the terminal base, so a failed unit is swapped in minutes without rewiring.
Recommended
Test Stand and Machine Retrofits
Engine test stands and legacy machine retrofits use the 1734-IK when a compact, PLC-integrated encoder counter is needed without replacing the whole I/O chassis. The module mounts on a DIN rail inside the existing cabinet, connects to the encoder via a 1734-TB base, and reports count or frequency to the controller over the POINTBus backplane. The 24-bit counter resolution (0-16,777,215) suits RPM measurement with high PPR encoders, and frequency reporting eliminates software period-capture coding. Because POINT I/O supports up to 63 modules per adapter, encoder channels can be added one at a time as instrumentation expands. Series C hardware ensures current-production availability for retrofit spares.
Recommended
Recommended Products Summary
Engineering reference data for 1734-IK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 1734-IKK | 1734-IJ |
|---|---|---|---|
| Package / Form Factor | POINT I/O module (1734 form factor, DIN rail via terminal base) | POINT I/O module - same form factor, conformal coated | POINT I/O module - same form factor |
| Brand | Rockwell Automation (Allen-Bradley) | Rockwell Automation (Allen-Bradley) | Rockwell Automation (Allen-Bradley) |
| Encoder Input Voltage | 15-24 V DC | 15-24 V DC | 5 V DC |
| Counter Channels | 1 | 1 | 1 |
| Counter Resolution | 24-bit (0 to 16,777,215) | 24-bit (0 to 16,777,215) | 24-bit (0 to 16,777,215) |
| POINTBus Current, Max | 160 mA | 160 mA | 160 mA |
| Conformal Coating | No | Yes (K suffix) | No (1734-IJK is coated version) |
| Terminal Base Compatibility | 1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S | 1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S - same | 1734-TB, 1734-TBS, 1734-TB3, 1734-TB3S - same |
Key Differentiators
- 24V DC encoder input for industrial noise immunity (vs 1734-IJ)
- Conformal-coated variant available (vs 1734-IKK)
- Hardware counter independent of scan time (vs Generic discrete input counting)
Design Notes
The most frequent integration error is encoder voltage mismatch: the 1734-IK requires 15-24V DC encoder signals, while the visually identical 1734-IJ is a 5V DC module. Verify the encoder output stage before ordering and label the terminal base with the module type during commissioning. When retrofitting, check whether an existing 5V encoder can be re-powered at 24V or whether signal conditioning is needed; connecting 24V signals to a 1734-IJ or expecting 5V signals to reliably drive a 1734-IK both cause counting failures or damage.
Budget 160 mA maximum POINTBus current for the 1734-IK when sizing the network adapter. Sum this with all other modules in the POINT I/O assembly and verify the adapter (for example 1734-AENT) total current capacity is not exceeded. The module dissipates up to 1.5 W (5.1 BTU/hr) at rated load, which is negligible for panel thermal calculations at typical module counts, but enclosed panels in hot environments should still be checked against the adapter and power supply derating curves.
Torque terminal base screws to the specified 0.6 Nm (7 lb-in) on the 1734-TB, 1734-TBS, 1734-TB3, or 1734-TB3S base. Under-torqued encoder signal terminals intermittently open under vibration - the classic symptom is a counter that randomly loses pulses - while over-torque cracks the base. For high-vibration installations, apply the recommended wiring practice from Rockwell publication 1734-IN005: use stranded wire with ferrules and dress encoder cables away from AC power conductors to prevent false counts from inductive coupling.
Compliance Information
Compliance data not present in the verified web data retrieved as of 2026-10-20. Rockwell Automation product pages should be consulted for RoHS/REACH declarations for the 1734-IK.