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Product Name: Technology module TM PosInput
Brand Name:Siemens
Model Number:6ES7151-1AB01-0AB0
Country of Origin:Germany
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Siemens |
Model Number: |
6ES7151-1AB01-0AB0 |
Country of Origin: |
Germany |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Specification |
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Manufacturer |
Siemens |
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Catalog Number |
6ES7551-1AB01-0AB0 |
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Product Type |
Technology Module – TM PosInput 2 |
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System Compatibility |
SIMATIC S7-1500 / ET 200MP |
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Firmware Version |
V2.0 |
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Channels |
2 |
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Input Current |
75 mA max (without load) |
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Power Loss |
5.5 W typical |
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Address Space (Inputs) |
32 bytes (16 per channel); 4 bytes in Fast Mode |
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Address Space (Outputs) |
24 bytes (12 per channel); 4 bytes for Motion Control; 0 bytes in Fast Mode |
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Digital Inputs |
4 (2 per channel), Type 3 per IEC 61131, 24 V DC |
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Digital Outputs |
4 (2 per channel), transistor, 0.5 A per output |
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Encoder Supply |
5 V DC (5.2 V ±2%, 300 mA) and 24 V DC (L+ -0.8 V, 300 mA) per channel, short-circuit proof |
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Encoder Interfaces |
SSI (RS422), incremental/pulse (RS422 or TTL 5 V) |
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Max Counting Frequency |
4 MHz (with quadruple evaluation) |
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SSI Clock Frequency |
125 kHz, 250 kHz, 500 kHz, 1 MHz, 1.5 MHz, 2 MHz |
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SSI Frame Length |
10 – 40 bits |
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Dimensions (W×H×D) |
35 × 147 × 129 mm |
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Weight |
Approx. 325 g |
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Operating Temperature |
–30°C to +60°C (horizontal); –30°C to +40°C (vertical) |
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Storage Temperature |
–40°C to +70°C |
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Isolation |
Between channels and backplane bus: Yes; Between channels: No |
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Isochronous Mode |
Yes |
The Siemens 6ES7551-1AB01-0AB0, also designated as TM PosInput 2, is a two‑channel technology module engineered for the SIMATIC S7‑1500 and ET 200MP automation systems. This 6ES7551‑1AB01‑0AB0 module interfaces with SSI absolute encoders as well as incremental and pulse encoders (RS‑422 or TTL). The TM PosInput 2 provides high‑speed position detection, counting, and measurement functions, supporting counting frequencies up to 4 MHz. With integrated digital inputs/outputs and short‑circuit‑proof encoder supplies, the 6ES7551‑1AB01‑0AB0 offers a compact and flexible solution for motion control and precision measurement tasks.
Mounting: Installed on S7‑1500 mounting rail; supplied as an open‑type module requiring installation in an enclosure.
Power Supply: Connect 24 V DC supply via the 4‑pin power supply element (terminals 41 L+, 44 M). The module monitors the supply voltage.
Front Connector: 40‑pin connector for encoder signals (SSI, RS‑422, or TTL), digital inputs/outputs, and encoder supplies.
Encoder Supplies: Per channel, 5 V DC (5.2 V ±2%, 300 mA) and 24 V DC (L+‑0.8 V, 300 mA) are provided; both are short‑circuit and overload protected.
Shielding: Ground cable shields at both the front connector shield support and at the encoder.
Cable Lengths: Shielded inputs up to 1,000 m; unshielded up to 600 m. For RS‑422 SSI encoders, cable length depends on clock frequency (e.g., 320 m at 125 kHz, 8 m at 2 MHz).
Two independent channels for position detection, counting, and measurement
SSI absolute encoder support – frame length 10‑40 bits, Gray or binary code, configurable parity and monoflop time
Incremental/pulse encoder support – RS‑422 or TTL (5 V) signals, single/double/quadruple evaluation
Counting frequency up to 4 MHz (with quadruple evaluation)
Four digital inputs (2 per channel) and four digital outputs (2 per channel, 0.5 A)
Integrated, short‑circuit‑proof encoder supplies – 5 V and 24 V per channel
Capture, synchronization, and gate control functions for precise event handling
Measurement functions – frequency, period, and velocity measurement
Comparison value switching – direct output activation at defined position/counter values
Isochronous mode support
Fast Mode – reduced feedback interface for very short send clocks (down to 125 µs)
The 6ES7551‑1AB01‑0AB0 acquires encoder signals (SSI, incremental, or pulse) and processes them for position detection, counting, or measurement applications. For incremental encoders, the module evaluates A/B signals with single, double, or quadruple resolution; counting frequency reaches up to 4 MHz. For SSI absolute encoders, it reads position values via a synchronous serial interface with configurable frame length (10‑40 bits), clock frequency, and parity.
The module can be operated in three main modes: (1) with the "Counting and measurement" technology object (High_Speed_Counter or SSI_Absolute_Encoder instructions), (2) for "Motion Control" position input (axis technology objects), or (3) manually via direct control and feedback interfaces.
Key functions include Capture (latching the current value on an external trigger), synchronization (loading a start value on a reference signal), and gate control (defining the acquisition window). Two digital outputs per channel can switch directly upon comparison events, enabling fast reaction times independent of the CPU cycle.
The module supports isochronous mode for synchronized acquisition in fixed system cycles, and Fast Mode which reduces the feedback interface for shorter send clocks (down to 125 µs).
Q1: What is the Siemens 6ES7551-1AB01-0AB0 used for?
The 6ES7551‑1AB01‑0AB0 (TM PosInput 2) is a technology module for SIMATIC S7‑1500 and ET 200MP systems, used for high‑speed position detection, counting, and measurement with SSI, incremental, or pulse encoders.
Q2: What types of encoders does the 6ES7551-1AB01-0AB0 support?
The 6ES7551‑1AB01‑0AB0 supports SSI absolute encoders (RS‑422), incremental encoders with or without N signal, and pulse encoders (with or without direction signal, up/down count). Interfaces are RS‑422 or TTL (5 V).
Q3: What is the maximum counting frequency of the 6ES7551-1AB01-0AB0?
With quadruple evaluation, the 6ES7551‑1AB01‑0AB0 supports counting frequencies up to 4 MHz.
Q4: Does the 6ES7551-1AB01-0AB0 support isochronous mode?
Yes. The 6ES7551‑1AB01‑0AB0 supports isochronous mode, enabling synchronized acquisition of position and counter values in a defined system cycle.
Q5: What is Fast Mode on the 6ES7551-1AB01-0AB0?
Fast Mode is a reduced‑functionality operating mode that provides a shortened feedback interface with no control interface, allowing send clocks as short as 125 µs for very fast acquisition of counter or position values.
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