Allen Bradley 1756-OB16E Electronically fused DC output module

FAQ

Q1: What is the purpose of the 1756‑OB16E module?
It provides 16 discrete DC output channels with electronic fusing to drive DC field loads such as solenoids, lamps, and relays.

Q2: What voltage range does the 1756‑OB16E support?
It supports an operating voltage range from ~10 V to ~31.2 V DC with 12/24 V nominal category.

Q3: How is output current rated?
Each output can supply up to ~1 A at 60 °C and the module total up to ~8 A at 60 °C.

Q4: Does this module include output isolation?
Yes, it has continuous ~250 V isolation between groups of 8 outputs and the backplane, but no isolation between individual outputs.

Q5: What is the typical output response time?
OFF to ON delay is ~70 µs nominal (≤1 ms max) and ON to OFF ~360 µs nominal (≤1 ms max).

Q6: How much backplane power does it use?
It draws about ~250 mA at 5.1 VDC and ~2 mA at 24 VDC, totaling ~1.32 W.

Q7: What are the environmental operating limits?
It operates from 0 °C to 60 °C and can be stored from −40 °C to 85 °C with up to 95 % non‑condensing humidity.

Q8: What are the physical size and weight of the module?
Typical dimensions are ~300 mm × 38.1 mm × 111.25 mm and weight ~0.26 kg.

1756-OB16E Allen Bradley

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