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Siemens 6AG1138-4DF11-7AB0 — PLCs (Programmable Logic Controllers)

Siemens 6AG1138-4DF11-7AB0 SIPLUS Serial Interface Module, -

MPN6AG1138-4DF11-7AB0

Siemens 6AG1138-4DF11-7AB0 SIPLUS ET 200S EM 1SI serial interface module, 1-channel, 15 mm wide, RS-232/422/485, Modbus/USS, -25 to +70 °C, conformal coated.

Siemens 6AG1138-4DF11-7AB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1138-4DF11-7AB0 — Electrical
ParameterValue
Rated value (DC)24 V
Power loss (typ.)1.2 W
6AG1138-4DF11-7AB0 — Environmental
ParameterValue
Installation altitude, max.5 000 m
Temperature, min.-25 °C; = Tmin
Temperature, max.70 °C; = Tmax
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)
6AG1138-4DF11-7AB0 — Mechanical
ParameterValue
Width15 mm
Height81 mm
Depth52 mm
Weight (approx.)50 g

Product details

What this module provides

The 6AG1138-4DF11-7AB0 is a SIPLUS variant of the ET 200S EM 1SI serial interface module, based on 6ES7138-4DF11-0AB0 with a conformal coating for harsh environments. It adds one serial channel supporting RS-232, RS-422, or RS-485 with selectable protocols: USS for drive communication or Modbus RTU for PLC-to-device links. Baud rates from 110 to 115.2 kbit/s, half duplex. Power draw is typical 20 mA from the 24 V DC supply (max. 80 mA) plus 10 mA from the backplane bus, with a typical power loss of 1.2 W. The conformal coating and resistance to aggressive gases, salt spray, and oil make it suitable for harsh environments.

Integration notes

Physical width is 15 mm, same as standard ET 200S electronic modules. Depth 52 mm, height 81 mm. A single interface port is available, selectable for RS-232 (full 8-signal DTE with TxD, RxD, RTS, CTS, DTR, DSR, DCD, PE), RS-422 (TxD/RxD with GND), or RS-485 (half-duplex R/T with GND).

Frequently asked questions

What compliance documentation is available for this module?

The module carries environmental qualification per ANSI/ISA-71.04 (aggressive gas, salt spray, oil) and IPC-CC-830A conformal coating. Certificates such as CE, UL, and RoHS are standard for the base product line; specific declarations are available upon request.

MPN
6AG1138-4DF11-7AB0