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Siemens 6AG1551-1AB00-7AB0 — PLCs (Programmable Logic Controllers)

Siemens 6AG1551-1AB00-7AB0 SIPLUS, Position Capture 5V/24V

MPN6AG1551-1AB00-7AB0

Siemens SIPLUS 6AG1551-1AB00-7AB0, S7-1500 position capture module, RS422/TTL 5 V inputs, 16-byte inputs, 12-byte outputs, 5.2 V ±2 % and 24 V L+ supply.

Siemens 6AG1551-1AB00-7AB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1551-1AB00-7AB0 — I/O
ParameterValue
Digital inputs4; 2 per channel
Digital outputs4; 2 per channel
Input data area16 byte; Per channel
Output data area12 byte; per channel; 4 bytes for Motion Control
6AG1551-1AB00-7AB0 — Electrical
ParameterValue
Rated value (DC)24 V
Permissible range, lower limit (DC)19.2 V
Permissible range, upper limit (DC)28.8 V
Power loss (typ.)5.5 W
Short-circuit protectionYes; electronic/thermal
6AG1551-1AB00-7AB0 — Environmental
ParameterValue
Installation altitude, max.5 000 m
Operating temperature, min. (horizontal mounting)-40 °C; = Tmin (incl. condensation/frost); start-up @ -25 °C
Operating temperature, max. (horizontal mounting)70 °C; Please note derating for inductive loads
Ambient temperature vs. altitude/pressure deratingTmin ... Tmax at 1 140 hPa ... 795 hPa (-1 000 m ... +2 000 m) // Tmin ... (Tmax - 10 K) at 795 hPa ... 658 hPa (+2 000 m ... +3 500 m) // Tmin ... (Tmax -20 K) at 658 hPa ... 540 hPa (+3 500 m ... +5 000 m)
6AG1551-1AB00-7AB0 — Mechanical
ParameterValue
Width35 mm
Height147 mm
Depth129 mm
Weight (approx.)325 g

Product details

The 6AG1551-1AB00-7AB0 is the SIPLUS extended-temperature variant of the Siemens TM PosInput 2 module for the S7-1500 system. It captures position data from incremental or absolute encoders via RS-422 or 5 V TTL interfaces, handling 16 input bytes and 12 output bytes — 4 of those dedicated to motion control. Supply rails are held to 5.2 V ±2 % and 24 V with a 0.8 V drop on L+, so encoder power stays within tolerance over the bus.

Mechanical & Wiring Integration

Mounts on the S7-1500 mounting rail, occupying 35 mm width, 147 mm height, and 129 mm depth behind the panel. Encoder cabling should be shielded for runs up to 1 000 m. The module includes a diagnostic alarm and wire-break detection set between 48 Ω and 12 kΩ.

MPN
6AG1551-1AB00-7AB0