Siemens 6ES7288-2QR16-0AA0 Digital Output Relay Module
A 16-point relay output expansion module with four isolated output groups for SIMATIC S7-200 SMART systems.
Product Overview
Siemens 6ES7288-2QR16-0AA0 is the SIMATIC S7-200 SMART EM QR16 expansion module. It provides sixteen relay dry-contact outputs arranged in four isolation groups.
The complete catalog number distinguishes the relay design from the QT16 transistor module. Replacement selection must preserve contact-load class, group feeds, field voltage and the installed terminal map.
Technical Data
Functions
Contact-based switching
Dry contacts allow the approved DC or AC field circuit to remain electrically separate from the controller logic.
Grouped field distribution
Four isolation groups let the panel designer separate documented load groups while respecting the per-common limit.
Defined fallback behavior
The project can retain the last output state or use a substitute value when the CPU enters STOP.
Service-life boundary
Relay contacts require load, inrush, suppression and switching-frequency review rather than transistor-output assumptions.
Applications
Machine contactor, valve and indicator circuits within the published relay ratings.
Retrofit of an installed EM QR16 position with the same common-group wiring.
Panels that require dry-contact switching instead of sourcing transistor outputs.
Service Planning
Project capture
Archive the Micro/WIN SMART project and the sixteen-point output assignment.
Circuit review
Record each group feed, load voltage, branch protection, inrush and suppression.
Controlled transfer
Move conductors group by group with all field sources isolated and verified.
Acceptance
Exercise every contact and prove feedback, interlocks and the configured STOP response.
Related Models
FAQ
Can 6ES7288-2QR16-0AA0 be replaced by the QT16 transistor module?
Not as a like-for-like exchange. The relay contacts and transistor outputs have different field supplies, switching behavior, isolation and load requirements.
What group information should accompany a 6ES7288-2QR16-0AA0 enquiry?
Provide the four common-group feeds, load voltages, point schedule, terminal photographs and the complete installed label.
How should inductive loads be reviewed for 6ES7288-2QR16-0AA0?
Document steady and inrush current, switching frequency and the approved suppression at every coil before transferring the circuit.
Why does contact history matter when servicing 6ES7288-2QR16-0AA0?
Relay life depends on the actual load and switching duty, so maintenance records help identify contacts that should not be carried into a spare decision.
What confirms 6ES7288-2QR16-0AA0 is ready after replacement?
Verify all group feeds, command each output under controlled conditions and prove feedback, safe states and every affected interlock.
