ALLEN BRADLEY 1734-OB8S Series A Programmable Logic Controller Module

Brand: Allen Bradley
Model: 1734-OB8S
Type: Programmable Logic Controller Module
Country of production: United States

The Allen Bradley 1734-OB8S Point safety output module has solid-state output and comes in two series (A and B).
It has a dual channel mode and will use 2 output signals to control any redundancy. The Allen Bradley 1734-OB8S series has eight (8) current source outputs per module.
The 1734-OB8S output has an output current of 1A per channel. Its pulse width is 475 microseconds and pulse period is 575 milliseconds.
The maximum field capacitance limit for each output is 950 nF. Its voltage drop reaches 0.165 volts and the maximum leakage current is 0.1 mA.
The 1734-OB8S has a short circuit detection function, including short circuit, high, low, and cross circuit fault detection.
The short circuit is electronically protected and its output can aggregate 8A current. The reaction time of 1734-OB8S is up to 6.2 milliseconds, and its point bus current is as high as 190 mA.
Its maximum power consumption is 4.5 watts, with a typical power consumption of 3.02 watts. Its heat dissipation is 15.38 BTU/hour.
Its isolation voltage is 50 volts continuous, and there is basic insulation between the on-site side and the system. There is no isolation between each channel.
The 1734-OB8S has been tested at 707 volts DC for 60 seconds. Its power bus operates at a nominal voltage of 24 V DC and a voltage of 19.2 to 28.8 V DC.
When there is no load, the power bus current is 75 mA. It comes with various indicator lights, with 1 yellow indicating lock status, 1 green/yellow indicating power status, and 8 I/O indicating channels. one
The wiring category of 734-OB8S is 2 conduction signal ports. The wiring size and terminal torque can only be determined by the installed terminal. The dimensions of 1734-OB8S are 77 x 25 x 55 millimeters.
The 1734-OB8S has a maximum power bus current of 50 mA when the load is not connected.
For the two series of Allen Bradley 1734-OB8S, the operating temperature is -20 to 55 degrees Celsius and the storage temperature is -40 to 85 degrees Celsius.
Its relative humidity is 5% to 95%, non condensing, vibrating 5 G at 500 Hz, operating shock 30 G, and non operating 50 G.
It meets the following requirements: SIL CL2, PLe, Category 4. This security module is compatible with GuardLogix, Compact GuardLogix, and SmartGuard controllers.
However, if you are using an Ethernet network, when configuring the 1734-OB8S Point secure output module,
GuardLogix programming tools and Logix Designer applications are the best choices. This secure I/O module weighs 2.2 ounces.
1734-OB8S is an Allen Bradley module belonging to the Point Guard IO security module. This module has solid-state output and can operate in single channel or dual channel mode.
Single channel mode uses an output signal to provide control. In this mode, this module is qualified for applications that require Security Category 2,
And when the point mode configuration of the channel is configured for safe pulse testing, the rated value includes performance level d/SIL CL2.
The 1734-OB8S single channel mode is approved for safe applications with a process safety time of no less than 600 ms. It can also be used for applications with a demand rate not exceeding 1 demand per minute.
The dual channel mode uses two output channels to achieve redundant control, which is required for safety categories 3 and 4, and the rated performance includes when the channel's point mode configuration is configured for safety pulse testing,
The ORMANCE level e/SIL CL3.1734-OB8S safety output can undergo pulse testing to detect short circuits in field wiring.
When the module detects a fault, the output will close and remain closed until the module recovers from the detected fault.
To make the secure output active, it is necessary to eliminate the cause of the error, command the secure output to switch to the secure state, or allow the output error time to expire.
Once the red light of the indicator light goes out, the module's fault recovery meets the requirements.

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