Siemens 6ES7288-2QT16-0AA0 Digital Output Transistor Module
A 16-point sourcing MOSFET output module with four supply groups for 24 V DC loads.
Product Overview
Siemens 6ES7288-2QT16-0AA0 is the SIMATIC S7-200 SMART EM QT16 digital output expansion module. Sixteen sourcing MOSFET outputs are divided across four documented 24 V DC supply groups.
The transistor module is intended for approved DC loads. It is not a relay-contact substitute, and the absence of built-in overload protection makes external circuit protection and load review essential.
Technical Data
Functions
Solid-state response
MOSFET outputs provide fast switching without the mechanical contact wear of the QR16 relay variant.
Four-group distribution
The terminal plan separates the sixteen points into four supply/common groups that must be recreated exactly.
Project-defined STOP state
The last value or a substitute value can be assigned for CPU STOP behavior.
External protection boundary
The module does not provide overload protection, so the field circuit must supply approved protection and suppression.
Applications
Fast 24 V DC indicator, interface and actuator circuits within published limits.
S7-200 SMART panels requiring sixteen sourcing transistor outputs.
Replacement of a documented QT16 position with matched supply groups and loads.
Service Planning
Project capture
Save output addresses, substitute values and machine-state dependencies.
Load review
Record operating current, inrush, switching rate, polarity and suppression for each load.
Controlled transfer
Verify every L/M supply pair before reconnecting the four output groups.
Acceptance
Check off-state and on-state behavior, feedback and the complete safety sequence.
Related Models
FAQ
Can 6ES7288-2QT16-0AA0 switch AC loads directly?
No. It is a sourcing 24 V DC transistor module; use an approved interface when the field load requires another voltage or switching technology.
What must match across the four groups on 6ES7288-2QT16-0AA0?
Match every L/M supply pair, point assignment, conductor polarity, branch protection and the loads connected to that group.
Why is external protection important for 6ES7288-2QT16-0AA0?
The module has no internal overload protection, so the panel design must limit fault current and manage inductive energy.
When is 6ES7288-2QT16-0AA0 preferable to a relay output module?
Use it only when the approved application needs sourcing DC outputs and its switching, grouping and load limits suit the circuit.
What commissioning record should be retained for 6ES7288-2QT16-0AA0?
Keep supply measurements, project checksum, point-by-point load tests, STOP-state verification and final interlock results.
