ALLEN BRADLEY 1756-OB16 DC Digital I/O Modules

Outputs

16 (8 points per group)

Voltage Category

24V DC source

Operating Voltage Range

19.2…30V DC

Output Delay Time

Off to On: 60 µs nom/1 ms max  On to Off: 630 µs nom/5 ms max

Current Draw @ 5.1V

250 mA

Current Draw @ 24V

140 mA

Total Backplane Power

4.64 W

Power Dissipation (max)

3.3 W @ 60 °C (140 °F)

Thermal Dissipation

11.25 BTU/hr

Off-State Leakage Current

1 mA per point (max)

On-State Voltage Drop

1.2V DC @ 2 A (max)

Current per Point (max)

2 A @ 30 °C (86 °F) (linear derating)  1 A @ 60 °C (140 °F) (linear derating)

Current per Module (max)

8 A @ 30 °C (86 °F) (linear derating)  4 A @ 60 °C (140 °F) (linear derating)

Surge Current per Point

4 A for 10 ms per point, repeatable every 1 s

Load Current (min)

3 mA per point

Scheduled Outputs

Synchronization within 16.7 s max, reference to Coordinated System Time

States in Fault Mode

Hold last state, On or Off (default: Off)

States in Program Mode

Hold last state, On or Off (default: Off)

Isolation Voltage

250V (continuous), basic insulation type, outputs-to-backplane, and output group-to-group  No isolation between individual group outputs

Module Keying

Electronic, software configurable

Fusing

Electronically fused per point

Removable Terminal Block

1756-TBCH, 1756-TBS6H

RTB Keying

User-defined mechanical

Slot Width

1

Wire Category

1

Enclosure Type

None (open-style)

Temperature Code

T4