Allen Bradley 1756-OB16I Individually isolated digital DC output

FAQ

Q1: What is the main purpose of the 1756‑OB16I module?
It provides 16 individually isolated DC output channels for switching external loads in a ControlLogix system.

Q2: What DC voltage range does this module operate in?
It supports an operating range of 10 – 30 V DC, with a nominal 12/24 V source.

Q3: How much current can each output channel supply?
Each channel can supply up to 2 A at 30 °C, derated to 1 A at 60 °C.

Q4: Is there electrical isolation in this module?
Yes, each output is individually isolated with approximately 250 V continuous isolation to the backplane.

Q5: What is the typical backplane power usage?
It draws about 350 mA at 5.1 VDC and about 2.5 mA at 24 VDC.

Q6: What are the output switching time characteristics?
Typical OFF→ON delay is up to ~1 ms and ON→OFF up to ~2 ms.

Q7: What are the typical physical dimensions of the module?
It follows the standard ControlLogix I/O module size, about 300 mm × 38.1 mm × 111.25 mm.

Q8: How much does the module weigh?
Approximately 0.34 kg.

1756-OB16I Allen Bradley

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