Allen-Bradley 1734-IB8S POINT I/O Safety Input Module

Product Overview

The Allen-Bradley 1734-IB8S is a POINT I/O Guard I/O safety module. It delivers eight current sinking safety inputs. Four pulse test outputs support external wiring checks. This module operates at 24 VDC nominal. It meets Safety Integrity Level (SIL) requirements. The module works with GuardLogix and Compact GuardLogix controllers. It fits into POINT I/O platforms with CIP safety protocol extensions.

Application Scenarios

Engineers use this module for emergency stop push buttons, gate switches, and light curtains. The module supports dual-channel mode for Category 3 and 4 safety applications. Single-channel mode works for Category 2. Configurable discrepancy time checks two input signals for consistency. External wiring short check uses test outputs. On and off signal delays prevent false readings from signal fluctuations. This module reacts in 16.2 milliseconds per channel.

Technical Specifications

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Part number: 1734-IB8S
• Series: POINT I/O
• Module type: Guard I/O Safety Module
• Input type: Current sinking
• Number of inputs: 8
• Number of pulse test outputs: 4
• Operating supply voltage: 24 VDC nominal (range 19.2 to 28.8 VDC)
• Power dissipation: 3.4 W (11.62 BTU/hour)
• Input current maximum: 175 mA
• Bus current (no load): 25 mA
• Dimensions: 77 x 25 x 55 mm (3.03 x 0.98 x 2.17 inches)
• Weight: 62.4 g (2.2 ounces)
• Enclosure type: Open style
• Key switch: Key 1 left position 8, Key 2 right position 1
• Reaction time: 16.2 ms per channel
• Isolation voltage: 50 V continuous
• Series: A and B
• Communication via 1734-AENT or 1734-PDN adapters
• Supported controllers: SmartGuard, GuardLogix, Compact GuardLogix
• Temperature derating: 2.8A at 20°C

Installation & Maintenance Guide

Install the module on a 1734-TOP or 1734-TB terminal base. Set the key switch to position 8 left and 1 right. Mount the module horizontally or vertically. Connect to a 1734-AENT or 1734-PDN adapter for network communication. The module has an open style enclosure. Use it inside a cabinet for protection. Check wiring for short circuits using test outputs. Follow safety standards for SIL installations.

Packing List

Each package contains one 1734-IB8S module and a documentation manual. We ship all orders via FedEx, UPS, or DHL for fast delivery.