Siemens SIMATIC S7-1500 Technology Modules TM Count/PosInput/PTO/FAST

Technology modules for SIMATIC S7-1500 and ET 200MP for counting, position detection, time-based I/O, pulse train output and user-programmable high-speed tasks.

Key features

TM Count 2x24V: 2 channels for 24 V incremental encoders
TM PosInput 2: RS422 incremental or SSI absolute encoders
TM Timer DIDQ: time-controlled I/O, PWM, oversampling
TM PTO 4: 4-channel pulse train output for stepper drives
TM FAST: FPGA module programmable with Quartus Prime, <1 µs response

Specifications

Brand	Siemens
Product line	SIMATIC S7-1500
Category	PLC I/O Modules
Series	SIMATIC S7-1500 / ET 200MP
Variants listed	8
Source	Siemens Catalog ST 70 · 2026, p. 946-974

6ES7550-1AA01-0AB0		Type: TM Count 2x24V \| Function: Counter module, 24 V encoders \| Channels / I/O: 2 ch, 3 DI + 2 DQ per ch \| Version: Standard
6ES7551-1AB01-0AB0		Type: TM PosInput 2 \| Function: Counting / position detection \| Channels / I/O: 2 ch, RS422/SSI, 2 DI 2 DQ/ch \| Version: Standard
6ES7552-1AA01-0AB0		Type: TM Timer DIDQ 24x24V \| Function: Time-based I/O, PWM \| Channels / I/O: max. 8 DI, 16 DQ \| Version: Standard
6ES7553-1AA01-0AB0		Type: TM PTO 4 \| Function: Pulse train output \| Channels / I/O: 4 ch, 24 V/RS422/5 V \| Version: Standard
6ES7554-1AA00-0AB0		Type: TM FAST \| Function: User-programmable FPGA \| Channels / I/O: 8 DI, 8 DQ, 4 DIQ, 8 RS485 DIQ \| Version: Standard
6ES7554-1AA00-5AA0		Type: TM FAST Debug Connector \| Function: USB blaster connection \| Channels / I/O: Accessory \| Version: Standard
6AG1550-1AA01-7AB0		Type: SIPLUS TM Count 2x24V \| Function: Counter module, 24 V encoders \| Channels / I/O: 2 ch, max. 200 kHz \| Version: SIPLUS extreme
6AG1551-1AB01-7AB0		Type: SIPLUS TM PosInput 2 \| Function: Counting / position detection \| Channels / I/O: 2 ch, RS422/SSI \| Version: SIPLUS, -40...+70 °C

PLC I/O ModulesSiemens

8 product codes available in this family

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Siemens SIMATIC S7-1500 Technology Modules TM Count/PosInput/PTO/FAST

Brand Siemens·PLC I/O Modules

Available part numbers (8)

6ES7550-1AA01-0AB0, 6ES7551-1AB01-0AB0, 6ES7552-1AA01-0AB0, 6ES7553-1AA01-0AB0, 6ES7554-1AA00-0AB0, 6ES7554-1AA00-5AA0, 6AG1550-1AA01-7AB0, 6AG1551-1AB01-7AB0

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Product codes & specifications

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RFQ List (0)

	Product code	Spec
	6ES7550-1AA01-0AB0	Type: TM Count 2x24V \| Function: Counter module, 24 V encoders \| Channels / I/O: 2 ch, 3 DI + 2 DQ per ch \| Version: Standard
	6ES7551-1AB01-0AB0	Type: TM PosInput 2 \| Function: Counting / position detection \| Channels / I/O: 2 ch, RS422/SSI, 2 DI 2 DQ/ch \| Version: Standard
	6ES7552-1AA01-0AB0	Type: TM Timer DIDQ 24x24V \| Function: Time-based I/O, PWM \| Channels / I/O: max. 8 DI, 16 DQ \| Version: Standard
	6ES7553-1AA01-0AB0	Type: TM PTO 4 \| Function: Pulse train output \| Channels / I/O: 4 ch, 24 V/RS422/5 V \| Version: Standard
	6ES7554-1AA00-0AB0	Type: TM FAST \| Function: User-programmable FPGA \| Channels / I/O: 8 DI, 8 DQ, 4 DIQ, 8 RS485 DIQ \| Version: Standard
	6ES7554-1AA00-5AA0	Type: TM FAST Debug Connector \| Function: USB blaster connection \| Channels / I/O: Accessory \| Version: Standard
	6AG1550-1AA01-7AB0	Type: SIPLUS TM Count 2x24V \| Function: Counter module, 24 V encoders \| Channels / I/O: 2 ch, max. 200 kHz \| Version: SIPLUS extreme
	6AG1551-1AB01-7AB0	Type: SIPLUS TM PosInput 2 \| Function: Counting / position detection \| Channels / I/O: 2 ch, RS422/SSI \| Version: SIPLUS, -40...+70 °C

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Siemens SIMATIC S7-1500 Technology Modules TM Count/PosInput/PTO/FAST