Product Overview
The 1734-IA4 is a 120 VAC discrete input module from Allen-Bradley. It belongs to the POINT I/O series. Moreover, the module provides four non-isolated sinking input channels. It accepts 120 VAC signals. Mounting is on a 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS terminal base. The module draws 75 mA at 5 VDC from the backplane. In addition, it needs an external 85–132 VAC supply. Use it for distributed I/O in PLC systems. However, the compact open-style housing measures 2.21 x 0.47 x 2.97 inches. It weighs about 30.9 g. Therefore, install it horizontally or vertically. Each channel has a status LED. As a result, module, network, and I/O status indicators help with fast diagnosis.
Technical Specifications
| Brand | Allen-Bradley |
| Model | 1734-IA4 |
| Series | POINT I/O |
| Module Type | 120 VAC Discrete Input Module |
| Input Channels | 4, non-isolated, sinking |
| Nominal Input Voltage | 120 VAC |
| Input Voltage Range | 0–132 VAC |
| External Supply Range | 85–132 VAC, 47–63 Hz |
| On-State Voltage | 65 VAC min, 132 VAC max |
| Off-State Voltage | 43 VAC max |
| Input Current Range | 4.0–8.5 mA |
| Off-State Current | 2.7 mA max at 43 VAC |
| Input Impedance | 10.6 kΩ nominal |
| Backplane Current | 75 mA @ 5.1 VDC |
| Power Dissipation | 0.50 W @ 132 VAC |
| Thermal Dissipation | 3.4 BTU max |
| Isolation | 240 V continuous, 3250 VDC type-tested 60 s |
| Key Switch Position | 8 |
| Enclosure Rating | Open-style, none |
| Dimensions | 2.21 x 0.47 x 2.97 inches |
| Weight | 30.9 g (1.09 oz) |
Measurement Notes: The module covers 0–132 VAC input range. Response follows 47–63 Hz AC signals. Also, sensitivity is defined by 65 VAC ON and 43 VAC OFF thresholds. Linearity and resolution apply to the digital ON/OFF state. Operating temperature follows the POINT I/O system rating. Because of the open-style housing, a clean panel enclosure is needed. Moreover, isolation and filtering support noise immunity in industrial panels.
Installation Guide
- Mount the module on a 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS base.
- Set the key switch to position 8.
- Wire field devices in sink configuration.
- Connect an external 85–132 VAC, 47–63 Hz supply.
- Keep the backplane load at 75 mA @ 5.1 VDC.
- Install horizontally or vertically for easy wiring.
Commissioning and Maintenance
Check the module status LED after power-up. Then confirm the network status LED links to the host. Use each channel LED to verify input energization. A lit I/O LED means the channel is active. Moreover, replace modules quickly with the removable terminal base. The open-style design allows fast visual checks. No special tools are needed for channel tests.
Compatibility
The 1734-IA4 fits the Allen-Bradley POINT I/O system. It works with 1734-TB, 1734-TBS, 1734-TOP, and 1734-TOPS bases. In addition, it connects to PLC hosts that support POINT I/O capacity. It suits distributed I/O networks in existing 1734 racks. Therefore, the module supports mixed I/O layouts with other POINT I/O slices.
Certifications and Compliance
The module follows Allen-Bradley POINT I/O standards. It carries isolation rating 240 V continuous and 3250 VDC type test for 60 s. Also, it meets 85–132 VAC, 47–63 Hz supply requirements. Check local panel standards before installation. Moreover, confirm host processor I/O limits before adding modules.
Packing List
- 1 x 1734-IA4 module
- Protective packaging
- Order confirmation and warranty record
Warranty and Shipping
Every order includes a 12-month warranty. We ship by FedEx, UPS, and DHL. Tracking is provided after dispatch. In addition, contact info@oiltechcontrols.com or +86 158 8020 0923 for shipping help.
Typical Applications
- 120 VAC limit switches and pushbuttons
- Relay and contactor status feedback
- Distributed control panels
- Obsolete POINT I/O system support
- AC sensor and pilot device input
Diagnostic Capabilities
The module provides module status, network status, and I/O status LEDs. Each channel has its own LED. A lit LED shows an energized input. A dark LED shows a de-energized channel. As a result, these indicators speed up wiring checks and fault finding. They also help confirm host communication during startup.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts
- Global shipment support with FedEx, UPS, DHL
- Tested industrial surplus and refurbished options
- 12-month warranty on every order
- Technical verification before shipment
- Support for obsolete control systems
FAQ
Q: How many input channels does the 1734-IA4 have?
A: It has four sinking input channels.
Q: What voltage does the module accept?
A: It accepts 120 VAC nominal, with a 0–132 VAC range.
Q: Which terminal bases fit this module?
A: Use 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS.
Q: What is the backplane current draw?
A: It draws 75 mA at 5.1 VDC.
Q: Does it include a warranty?
A: Yes. It includes a 12-month warranty.
Q: How do I contact sales?
A: Email info@oiltechcontrols.com or message +86 158 8020 0923 on WhatsApp.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
All rights reserved.
Reviews
There are no reviews yet.