Siemens 6ES7551-1AB01-0AB0 TM PosInput 2 Technology Module (SIMATIC S7-1500, ET 200MP) CAN Electric — Industrial Automation Parts Supplier

Incremental and absolute position feedback on two channels

The 6ES7551-1AB01-0AB0 is the TM PosInput 2 counter and position detection module of the SIMATIC S7-1500 and ET 200MP technology module range. Each channel accepts an SSI absolute encoder (data D and clock C over RS422) or an RS422/TTL incremental encoder with A, B and N signals, a pulse encoder with direction, a pulse encoder without direction, or a pulse encoder with up/down count signals.

Per-channel inputs, outputs and encoder supplies

Each channel has two digital inputs for gate control, synchronization and capture, and two short-circuit-proof digital outputs switched by the channel comparators (two comparators per channel) or used freely. The module provides one 5 V and one 24 V encoder supply per channel, each short-circuit-proof and rated 300 mA, with channel-by-channel wire-break and short-circuit monitoring.

Technology object engineering

Operation uses the High_Speed_Counter technology object for pulse and incremental encoders and the SSI_Absolute_Encoder technology object in STEP 7 (TIA Portal). The module supports isochronous mode, channel-by-channel hardware interrupts, diagnostic alarms and I&M0 to I&M3 identification data; firmware V2.0 is loaded via HSP0355.

Data per the official Siemens Equipment Manual TM PosInput 2 (6ES7551-1AB01-0AB0) and the Siemens Industry Mall data sheet; confirm the current Siemens data sheet before ordering large quantities.

One module for incremental and absolute encoders

RS422/TTL incremental encoders and SSI absolute encoders share the same two channels, so a single spare part covers both feedback types in a mixed machine park.

High-speed position acquisition up to 4 MHz

Quadruple evaluation reaches a 4 MHz counting frequency, while the SSI interface clocks up to 2 MHz with parameterizable telegram length, code, parity and monoflop time for the encoder in use.

Dual encoder supplies per channel

Each channel feeds either a 5 V (5.2 V ±2 %) or 24 V encoder at up to 300 mA, with short-circuit and overload monitoring reported through the module diagnostics.

Comparator outputs and capture at module level

Two comparators per channel switch the own digital outputs on threshold; capture and synchronization inputs let the module save positions independently of the program cycle.

For 24 V incremental or pulse encoders only, ask about the TM Count 2x24V; for time-stamped digital I/O and PWM, ask about the TM Timer DIDQ range.

Position feedback on drives and feed axes

Rotary and linear encoders on positioning axes, rotary tables, hoists and servo feed stages connect to the module in packaging, printing, machine tool and handling automation running on S7-1500 or ET 200MP.

Absolute position after power-on

SSI absolute encoders keep the axis position known after a restart without a homing run; comparator outputs and capture inputs support limit-switch and measurement tasks alongside the encoder feedback — feeding the same operator screens as the HMI hardware in the Related Siemens HMI Products block below.

Condition stated in writing

We are an independent channel trader, not Siemens and not a factory-authorized distributor. Every unit supplied is genuine new, and that condition is written on every quote.

Stock you can plan a project around

We trade a broad Siemens SIMATIC S7-1500 and ET 200MP inventory; the Related Siemens list on this page shows live USD list prices with EXW Hong Kong terms, and each quote states the exact quantity available.

Export handled on one thread

Cross-border requests are routine: a single thread covers quote, compliance note and dispatch, so buyers in India, Egypt, the Netherlands, Thailand, Malaysia, the Middle East and South America deal with one team.

The TM PosInput 2 mounts on the S7-1500 mounting rail in the standard 35 mm format and works in any S7-1500 CPU station or ET 200MP interface-module station, configured in STEP 7 (TIA Portal) with the High_Speed_Counter or SSI_Absolute_Encoder technology object. The 40-pole front connector — screw-type 6ES7592-1AM00-0XB0 or push-in 6ES7592-1BM00-0XB0 — is ordered separately from the module.

• Email sales@can-electric.com with the order number 6ES7551-1AB01-0AB0, quantity, delivery country, and whether you need a screw-type or push-in 40-pole front connector with the module.
• Prices are in USD, shipped from Hong Kong by DHL under EXW terms; units from current stock ship factory-sealed.
• Building a mixed station? Ask for other S7-1500 technology modules, digital and analog modules on the same request.

Engineers reach this page searching for “6ES7551-1AB01-0AB0”, “Siemens TM PosInput 2”, “S7-1500 SSI absolute encoder module”, “ET 200MP RS422 incremental encoder position module”, “SIMATIC S7-1500 TM PosInput 2 counter”, “SSI encoder TIA Portal SSI_Absolute_Encoder” or “buy genuine Siemens S7-1500 position module EXW Hong Kong”. For 24 V pulse counting, the selection table lists the predecessor article and the Related Searches point to the TM Count 2x24V family.