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Siemens 6ES7550-1AA00-0AB0 — PLC Communication Modules

Siemens 6ES7550-1AA00-0AB0 TM Count Module, 2-Ch, 24V

MPN6ES7550-1AA00-0AB0

Siemens S7-1500 TM Count, 6ES7550-1AA00-0AB0, 2-channel high-speed counter, 24 V DC, 35 x 147 x 129 mm, firmware V1.3.

$915.67 – $1,058.00Ref. price · indicative, final on quote
Siemens 6ES7550-1AA00-0AB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7550-1AA00-0AB0 — Identification
ParameterValue
Configurable from STEP 7 TIA Portal versionV12 (FW V1.0) ... V15 (FW V1.3)/V12 (FW V1.0), V13 (FW V1.1)
Firmware versionV1.3
6ES7550-1AA00-0AB0 — Communication
ParameterValue
I&M data supportYes; I&M0 to I&M3
Isochronous modeYes
6ES7550-1AA00-0AB0 — Electrical
ParameterValue
Rated value (DC)24 V
Permissible range, upper limit (DC)28.8 V
Permissible range, lower limit (DC)19.2 V
Current consumption, max.75 mA; without load
Power loss (typ.)4 W
Reverse polarity protectionYes
Short-circuit protectionYes; electronic/thermal
Isolation test voltage707 V DC (type test)
6ES7550-1AA00-0AB0 — I/O
ParameterValue
Input data area16 byte; Per channel
Output data area12 byte; per channel; 4 bytes for Motion Control
6ES7550-1AA00-0AB0 — Environmental
ParameterValue
Operating temperature, horizontal install, min.0 °C
Operating temperature, horizontal install, max.60 °C; Please note derating for inductive loads
Operating temperature, vertical install, max.40 °C; Please note derating for inductive loads
Operating temperature, vertical install, min.0 °C
6ES7550-1AA00-0AB0 — Mechanical
ParameterValue
Width35 mm
Height147 mm
Depth129 mm

Product details

Siemens TM Count module for S7-1500, order code 6ES7550-1AA00-0AB0. Two-channel high-speed counter with integrated encoder supply (one 24 V output common to both channels). Captures and counts pulses from incremental encoders or pulse generators, with a software gate for start/stop control and isochronous mode for deterministic data transfer. Inputs are 16 bytes per channel; outputs are 12 bytes per channel including 4 bytes for motion control data. Signal thresholds: logic 0 from -5 to +5 V, logic 1 from +11 to +30 V. Response time 50 µs per edge.

Frequently asked questions

What is the physical depth of this module?

129 mm front to back, consistent with standard S7-1500 modules. Width is 35 mm, height is 147 mm.

Can this module be sourced as a replacement for a failed unit?

Yes. The 6ES7550-1AA00-0AB0 is an active, current-production module. It is ordered against RFQ; typical lead times are quoted per request. No direct hardware or firmware changes are expected from earlier versions.

MPN
6ES7550-1AA00-0AB0