1. Introduction
This manual provides essential information for the installation, operation, and maintenance of the Allen Bradley 1734-Ib8s Ser B, Point Guard I/O Safety Input Module 1734-Ib8s Series B. Please read this manual thoroughly before using the device to ensure safe and efficient operation.
The Allen Bradley 1734-IB8S Series B is a Digital Input Module 24VDC 8-Ch Sink Safety, designed for industrial automation applications.
2. Product Overview
The Allen Bradley 1734-IB8S Series B is a Digital Input Module designed for industrial automation applications. It features 8 safety-rated sink inputs for 24V DC systems.
Figure 2.1: Allen Bradley 1734-IB8S Series B module in its factory sealed box, showing the product label with CAT 1734-IB8S and serial number.
Figure 2.2: Close-up view of the product packaging for the 1734-IB8S module, emphasizing the factory seal and key identification numbers like CAT 1734-IB8S and the barcode 10612598350619.
Key features include:
- 8 Safety-Rated Sink Inputs
- 24V DC Operating Voltage (11VDC - 28.8VDC)
- Input Delay Time, On to Off: 16.2 ms max
- On-State Current Min/Max: 3.3 mA/5 mA
- Maximum Off-State Current: 1.3 mA
- PointBus Current: 175 mA
3. Setup and Installation
Proper installation is crucial for the safe and reliable operation of the 1734-IB8S module. Follow these steps carefully:
- Power Disconnection: Ensure all power to the control system is disconnected before beginning installation.
- Mounting: Mount the module onto a compatible POINT I/O backplane or DIN rail. Ensure it is securely latched.
- Wiring: Connect the 24V DC power supply to the module's power terminals. Wire the safety input devices to the designated input channels. Refer to the system wiring diagrams for specific connections.
- Grounding: Ensure proper grounding of the module and associated equipment to prevent electrical hazards and ensure signal integrity.
- Verification: Double-check all wiring connections for correctness and security before reapplying power.
Note: Always consult the complete system documentation for detailed wiring diagrams and safety guidelines.
4. Operating Instructions
Once installed and powered, the 1734-IB8S module operates as part of the larger control system. Its primary function is to monitor the state of 8 safety-rated sink inputs.
- Input Monitoring: The module continuously monitors the voltage levels on its input channels.
- Status Indicators: Observe the LED indicators on the module for real-time status of each input channel. Typically, an illuminated LED indicates an active input.
- System Integration: The input status is communicated to the programmable logic controller (PLC) or safety controller via the PointBus.
- Safety Functionality: As a safety-rated module, it is designed to meet specific safety integrity levels (SIL) or performance levels (PL) when integrated into a safety system. Refer to the safety manual for detailed safety function implementation.
Important: Do not attempt to bypass or modify safety circuits. Always follow established safety procedures.
5. Maintenance
The 1734-IB8S module is designed for minimal maintenance. However, periodic checks can help ensure long-term reliability.
- Visual Inspection: Periodically inspect the module for any signs of physical damage, loose connections, or excessive dust accumulation.
- Cleaning: If necessary, gently clean the module's exterior with a soft, dry cloth. Do not use solvents or abrasive cleaners.
- Connection Integrity: Ensure all wiring connections remain secure and free from corrosion.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
Caution: Always disconnect power before performing any maintenance or cleaning procedures.
6. Troubleshooting
This section provides guidance for common issues encountered with the 1734-IB8S module.
| Problem | Possible Cause | Solution |
|---|---|---|
| Module LEDs are off | No power to module or backplane. | Check power supply connections and ensure backplane power is active. |
| Input LED not illuminating | Input device not active, wiring error, or faulty input device. | Verify input device operation. Check wiring for breaks or shorts. Test input device. |
| Module not communicating with PLC | Incorrect module configuration, PointBus issue, or PLC programming error. | Verify module configuration in PLC software. Check PointBus connections. Review PLC program logic. |
If troubleshooting steps do not resolve the issue, contact Allen-Bradley technical support.
7. Specifications
Detailed technical specifications for the Allen Bradley 1734-IB8S Series B module:
- Model Number: 1734-IB8S
- Series: B
- Input Type: Digital Sink Safety-Rated
- Number of Channels: 8
- Operating Voltage: 24V DC (Range: 11VDC - 28.8VDC)
- Input Delay Time (On to Off): 16.2 ms max
- On-State Current (Min/Max): 3.3 mA / 5 mA
- Maximum Off-State Current: 1.3 mA
- PointBus Current: 175 mA
- Product Dimensions: 8 x 8 x 7 inches
- Item Weight: 15.87 ounces
- Manufacturer: Allen Bradley
8. Warranty and Support
For information regarding product warranty, technical support, and service, please refer to the official Allen-Bradley or Rockwell Automation website, or contact your authorized distributor.
Online Resources: Visit the Rockwell Automation website for product documentation, software downloads, and support forums.
Technical Support: Contact Allen-Bradley technical support for assistance with product issues, configuration, or advanced troubleshooting.
