1756-OA8 ControlLogix AC output module Allen Bradley

Description

Overview

Essential details：1756-OA8 ControlLogix AC output module Allen Bradley

The 1756-OA8 is a ControlLogix AC output module that comes with 8 outputs. Manufactured by Allen-Bradley, the AC output module comes with a voltage capacity of 120 to 240 Volts AC while the operating voltage range is 74 to 265 Volts AC. The 1756-OA8 has a maximum output current rating point of 2 Amps at 60 degrees Celsius while the maximum output current rating module is 5 Amps at 30 degrees Celsius and 4 Amps at 60 degrees Celsius. The 1756-OA8 isolation voltage is rated at 50 Volts continuous and has 2 removable terminal blocks options which include the 1756-TBNH and also the 1756-TBSH. With a backplane current of 200 mA at 5 Volts, and 2 mA at 24 Volts, the power dissipation at the maximum is rated at 5.1 Watts at 60 degrees Celsius. The 1756-OA8 fits in any slot in the chassis.

The maximum operating temperature for the 1756-OA8 is 60 degrees Celsius while the minimum operating temperature is 0 degrees Celsius. The maximum storage temperature is 85 degrees Celsius with a minimum storage temperature of -40 degrees Celsius. The relative humidity is a maximum of 95%, non-condensing with the vibration frequency in the operational state being 500 Hertz. The 1756-OA8 supports various voltage options with an option for 8 to 32 points on each module. In addition, the 1756-OA8 supports both the isolated and non-isolated module types. It also has the point-level output fault states with direct-connect or rack-optimized communication. The 1756-OA8 also features the field-side diagnostics on select modules.

1756-OA8

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The 1756-OA8 module is a ControlLogix digital AC output module manufactured by Allen-Bradley. Its voltage range is 120 to 240 Volts AC at 50 to 60 Hertz and it has an operating voltage range of 74 to 265 Volts AC at 47 to 63 Hertz. It is compatible with the Allen-Bradley 1756-TBNH and 1756-TBSH Removable Terminal Blocks (RTB), and its current draw ratings are 200 milliamps at 5.1 Volts and 2 milliamps at 24 Volts. The 1756-OA8 AC output module has a total backplane power rating of 1.07 Watts. The output delay time (from off to on and on to off) is 9.3 milliseconds at 60 Hertz and 11 milliseconds at 50 Hertz.

Eight outputs (4 points each for Group 0 and Group 1) are available on the 1756-OA8 ControlLogix output module. Its States in Fault mode per point and States in Program mode per point can hold the last state (for both the on-state and the off-state). The current rating per point is 2 Amps at 60 degrees Celsius (linear derating) and the surge current rating per point is 20 Amps for 43 milliseconds (repeatable every 2 seconds at 60 degrees Celsius). The maximum power dissipation rating of the 1756-OA8 ControlLogix output module is 5.1 Watts at 60 degrees Celsius while its thermal dissipation is 17.39 BTU per hour. Its slot width is 1 and its minimum load current per point is 10 milliamps. In its off-state, the maximum leakage current of this module is 3 milliamps per point. The 1756-OA8 output module also supports synchronization within 16.7 seconds for scheduled outputs.

The Allen-Bradley 1756-OA8 is an Eight (8) Channel Discrete AC output module that features Two (2) I/O groups with Four (4) channels each. This module operates at an operating voltage range of 74 to 265 VAC with frequency range of 47/63 Hz.

The idea of channel groupings is to allow the module to independently operate each channel with different voltage levels however, it should be both AC voltage. This way, one group may operate at 120VAC while the other may operate at 240VAC at the terminal commons are not internally connected. Also, it provides isolation point when troubleshooting is conducted.