Siemens 6ES7288-3AQ02-0AA0 Two-Channel Analog Output Module
Two configurable voltage-or-current outputs with diagnostics for SIMATIC S7-200 SMART control loops.
Product Overview
Siemens 6ES7288-3AQ02-0AA0 is the SIMATIC S7-200 SMART EM AQ02 analog output expansion module. Its two channels can be configured for voltage or current output.
Selection and commissioning must account for load impedance, output mode, external 24 V DC supply, field wiring, the non-isolated architecture and the gold terminal connector.
Technical Data
Functions
Dual-mode channels
Each output is commissioned for the required voltage or current loop rather than assumed from the connected device.
Output diagnostics
The module supervises overflow or underflow, low supply, voltage-mode short to ground and current-mode wire break.
Controlled STOP response
A channel can hold the last value or move to a configured substitute value when the CPU stops.
Load-aware accuracy
Correct load impedance and shielded wiring are part of achieving the documented output behavior.
Applications
Analog valve position, drive reference and setpoint circuits within the approved ranges.
Two-loop machine or process control using voltage or current commands.
Like-for-like EM AQ02 replacement with verified channel modes and load records.
Service Planning
Project capture
Export output range, scaling, substitute value and alarm-dependent logic.
Load review
Measure loop resistance and identify receiving-device input type and field reference.
Controlled transfer
Use the gold connector, preserve shield routing and keep both loops isolated during wiring.
Acceptance
Command multiple values, verify feedback, test diagnostics and prove the safe STOP response.
Related Models
FAQ
What channel information is required for a 6ES7288-3AQ02-0AA0 spare?
Provide each channel mode, scale, receiving-device type, loop resistance, wiring diagram and configured STOP value.
Why must load impedance be checked for 6ES7288-3AQ02-0AA0?
An unsuitable receiving load can prevent the commanded voltage or current from being delivered accurately even when the project is correct.
Which diagnostics should be proven on 6ES7288-3AQ02-0AA0?
Test the applicable overflow or underflow, low-supply, voltage short-to-ground and current wire-break responses under an approved procedure.
Can 6ES7288-3AQ02-0AA0 be wired as an isolated analog source?
No. Review grounding, reference potential and shield termination because the field side is not isolated from logic.
How should 6ES7288-3AQ02-0AA0 be validated after replacement?
Command low, mid and high values on both channels, compare receiving-device feedback and confirm the programmed STOP behavior.
