Siemens S7-400 FM450-1 two-channel counter / 6ES7450-1AP01-0AE0

Technical specifications

Controller family

SIMATIC S7-400

Channels

2 counter inputs; 32-bit unsigned or signed +/-31-bit

5 V counter input

RS-422; maximum 500 kHz

24 V counter input

Maximum 200 kHz; not the 500 kHz RS-422 rating

Input types

Symmetrical incremental encoder with two 90-degree-offset pulse trains; asymmetrical incremental encoder; 24 V initiator; pulse/direction

Digital inputs

6 auxiliary control inputs; separate from the two counter channels

Digital outputs

4

Rated supply

24 VDC auxiliary/load supply

Current from backplane bus

300 mA maximum from 5 VDC backplane

Power dissipation

6 W typical

Required front connector

1 x 48-pin; connector must be selected separately

Width

25 mm

Height

290 mm

Depth

210 mm

Weight

Approximately 650 g

Document pages

PDF 74, 75

Current lifecycle status

Not established by historical May 2017 catalogue; confirm current lifecycle and supply separately

Documents / datasheets

Source reviewed: 2026-10-22

Description

6ES7450-1AP01-0AE0: Two counter channels with input-mode-specific maximum rates. Specifications follow the exact manufacturer table in the May 2017 catalogue; verify supplied revision, current lifecycle and availability separately.