Description Of Allen Bradley PLC 1734-IB8S

The 1734-IB8S is an Allen-Bradley manufactured module used in applications with Safety Instrumentation Level (SIL) requirements. This module is a POINT Guard IO Safety module with Eight (8) Current Sinking Input Channel and Four (4) pulse Current Sourcing Pulse Test Outputs.

This module is typically used in applications that perform safety applications such as Emergency Stop Push Button, Gate Switches, Light Curtains and other safety devices may be connected to this module. It features a channel with Dual-channel mode capability for evaluating consistency of Two (2) input signals which enables the module to be used in applications that with Safety Category 3 and 4.

The 1734-IB8S may also be used in Single-Channel mode. This mode evaluates single signal which then allows the module to be used in application with Safety Category

Allen Bradley PLC 1734-IB8S Digital Input Module Features

• Safety digital inputs – Safety devices, such as Emergency Stop Push Button, gate switches, and safety light curtains, can be connected.

– Dual-channel mode evaluates consistency between two input signals (channels), which allows use of the module for safety Category 3 and 4 and in applications that are rated up to and including Performance Level e/SIL CL3 when both channels’ Point Mode configurations are set to Safety Pulse Test.

– Single-channel mode evaluates one input signal (channel), which allows use of the module for safety Category 2 and in applications that are rated up to and including Performance Level d/SIL CL 2 when the channel's Point Mode configuration is set to Safety Pulse Test.

– You can configure a discrepancy time to control how long two channels are allowed to be discrepant before a fault is declared.

– An external wiring short circuit check is possible when inputs are wired in combination with test outputs. The module must be wired in combination with test outputs when this function is used. – Independently adjustable on and off delays are available per channel.

• Test outputs (digital input modules only) – Separate test outputs are provided for short circuit detection of a safety input (or inputs). – Power (24V) can be supplied to devices, such as safety sensors. – Test outputs can be configured as standard outputs. – Specific test outputs can be used for broken-wire detection of a muting lamp.

Specification Of Allen Bradley PLC 1734-IB8S