Allen Bradley 1734-IB8S is a POINT I/O GUARD I/O safety module designed specifically for applications that meet Safety Instrumented Level (SIL) requirements. It integrates 8 current absorption safety input channels and 4 current source pulse test outputs, suitable for connecting safety devices such as emergency stop buttons, door switches, and light curtains.

Main features:

Input/Output: 8 current absorption input channels, 4 pulse current source test outputs.
Power supply voltage: nominal 24VDC, operating voltage range 19.2 to 28.8VDC.
Security level: Supports applications with security categories 2, 3, and 4.
Dual channel/single channel mode: Dual channel mode is used to evaluate the consistency of two input signals, while single channel mode is used to evaluate a single signal.
Differential time configuration: Differential time can be configured to determine the acceptable inconsistency time between two channels.
Short circuit check: The external wiring short circuit check function is enabled when the input channel is combined with the test output wiring.
Signal delay: Each channel has individually adjustable ON and OFF signal delays to prevent false alarms and false negative readings.
Communication: Can be used in conjunction with SmartGuard, GuardLogix, and Compact GuardLogix controllers to manage CIP security protocol extensions. Supports Ethernet/IP and DeviceNet network communication.
Physical characteristics: Size 77x25x55mm, weight 62.4 grams, open shell, can be installed horizontally or vertically.
Indicator lights: 10 LED indicator lights, including yellow lock status, yellow/green power status, and 8 I/O channel status LEDs.
Other: Maximum heat dissipation of 11.62 BTU/hour, maximum input current of 175mA (A series), maximum power bus current of 25mA (no-load), continuous isolation voltage of 50V.

Frequently Asked Questions:

Number of LED indicator lights: There are a total of 10 LED indicator lights.
Size: The size without installed terminal blocks is 77x25x55mm.
Pilot load rating: none.
Individual power supply: optional, not mandatory.
Short circuit protection: equipped.
The difference between Ser A and Ser B: POINT bus has different maximum current, maximum power consumption, and heat dissipation.
The meaning of the red LED indicator light is that it is constantly on, indicating external wiring faults or detecting input circuits; Flashing indicates that a fault has been detected in the partner input circuit.

Technical Description:

Allen Bradley 1734-IB8S is a powerful POINT I/O GUARD I/O safety module with current sink input type and current source output type with open circuit casing. It is designed specifically for a nominal operating power supply voltage of 24VDC and is suitable for various safety related automation applications. By providing features such as dual channel and single channel modes, configurable differential time, short circuit check function, and signal delay, this module ensures a high level of safety and reliability. Meanwhile, its compact design, rich communication options, and easy to install physical characteristics also make it an ideal choice in automation systems.

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