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.
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
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Lead timeCall for availability wk
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Configurable from STEP 7 TIA Portal version | V12 (FW V1.0) ... V15 (FW V1.3)/V12 (FW V1.0), V13 (FW V1.1) |
| Firmware version | V1.3 |
Communication
| Parameter | Value |
|---|---|
| I&M data support | Yes; I&M0 to I&M3 |
| Isochronous mode | Yes |
Electrical
| Parameter | Value |
|---|---|
| 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 protection | Yes |
| Short-circuit protection | Yes; electronic/thermal |
| Isolation test voltage | 707 V DC (type test) |
I/O
| Parameter | Value |
|---|---|
| Input data area | 16 byte; Per channel |
| Output data area | 12 byte; per channel; 4 bytes for Motion Control |
Environmental
| Parameter | Value |
|---|---|
| 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 |
Mechanical
| Parameter | Value |
|---|---|
| Width | 35 mm |
| Height | 147 mm |
| Depth | 129 mm |
Product details
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