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Siemens 6ES7123-1GB50-0AB0 — PLC I/O & Expansion Modules

Siemens 6ES7123-1GB50-0AB0 S7-1200 Analog Input, 2 AI, 4-20m

MPN6ES7123-1GB50-0AB0

Siemens S7-1200 6ES7123-1GB50-0AB0 analog input module, 2 channels, 4-20 mA, 12-bit, 24 V DC.

$840.11Ref. price · indicative, final on quote

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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6ES7123-1GB50-0AB0 — I/O
Parameter	Value
Analog inputs	2

6ES7123-1GB50-0AB0 — Electrical
Parameter	Value
Rated value (DC)	24 V
Power loss (typ.)	0.6 W
Reverse polarity protection	Yes
Isolation: between channels	No
Isolation: channels to backplane bus	No
Max. cable length, shielded	200 m

6ES7123-1GB50-0AB0 — Performance
Parameter	Value
Resolution incl. overrange (bit, with sign), max.	12 bit
Parameterizable	Yes; parameterizable in 4 stages by means of digital filtering
Diagnostics function	No

6ES7123-1GB50-0AB0 — Mechanical
Parameter	Value
Height	64 mm
Width	10 mm
Depth	51 mm
Weight (approx.)	20 g

Product details

The Siemens 6ES7123-1GB50-0AB0 is a 2-channel analog input module for the S7-1200 system, accepting 4-20 mA signals with 12-bit resolution. It operates on 24 V DC and draws up to 100 mA from the backplane bus. This module swaps into a standard S7-1200 slot (1 of 8), with a depth of 51 mm and width of 10 mm — a single-wide slice that fits the typical DIN-rail footprint.

Wiring & Mounting

Uses TB 16IM-SC terminal block. Input resistance is 50 Ω for the 4-20 mA loop; maximum burden for a 2-wire transmitter is 750 Ω. Includes reverse polarity protection and short-circuit proof inputs. Power loss is 0.6 W typical. The module supports digital filtering in four stages, parameterizable, with cycle time multipliers from 1x to 128x.