Allen-Bradley 1734-IB8S

The 1734-IB8S module, a creation of Allen-Bradley, finds its purpose in applications necessitating Safety Instrumentation Level (SIL) adherence. This module belongs to the POINT Guard IO Safety lineup, offering eight channels of Current Sinking Input and four channels of pulse Current Sourcing Pulse Test Outputs.

Tailored for safety-oriented tasks like Emergency Stop Push Buttons and Gate Switches, the 1734-IB8S accommodates a Dual-channel mode for signal consistency evaluation—suitable for Safety Category 3 and 4 scenarios. Alternatively, its Single-Channel mode evaluates single signals, aligning with Safety Category 2 requirements.

Configuration-wise, a customizable discrepancy time sets the allowable time gap between two channels before a fault is indicated. Additionally, an external wiring short check activates when input channels are linked with test outputs. Individual ON and OFF signal delay adjustments per channel mitigate false positives and negatives due to signal fluctuations.

With a 24 Volts DC nominal input voltage, maximum 175 mA input current, and 3.4 W peak power dissipation, the 1734-IB8S interfaces with SmartGuard, GuardLogix, and Compact GuardLogix controllers. It fits within POINT I/O platforms for CIP safety protocol extensions. Measuring 77 x 25 x 55 millimeters or 3.03 x 0.98 x 2.17 inches, the module accommodates 8 inputs, each channel responding in 16.2 milliseconds.

Its compatibility spans Ethernet/IP and DeviceNet networks via the 1734-AENT, 1734-AENTR, or 1734-PDN network adapters. Boasting versatility with horizontal or vertical mounting options, the 1734-IB8S, available in Series A and B, stands as a reliable asset in the realm of safety-centric industrial operations.

Module Type: Guard I/O Safety Module
Input Type: Current Sinking
Number of Inputs: 8
No. of Pulse Test Outputs: 4
Operating Supply Voltage: 24 Volts DC (nom)
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
Maximum Power Dissipation: 3.4 W
Terminal Bases: 1734-TB or 1734-TOP
Key Switch Positions: Key 1 (left) Position 8, Key 2 (Right) Position 1
Temperature vs Current
Derating: 2.8A at 20 Celsius
Enclosure Type: Open
Weight: 2.2 ounces
Dimensions: 3.03 x 0.98 x 2.17 inches