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Siemens 6ES7241-1CH30-1XB0 — PLC Communication Modules

Siemens 6ES7241-1CH30-1XB0 RS485 Comm Module, Modbus RTU Mas

MPN6ES7241-1CH30-1XB0
Active

Siemens S7-1200 RS485 communication module, 6ES7241-1CH30-1XB0, Modbus RTU master/slave, USS, ASCII, 38 mm wide, IP20.

$67.31 – $164.57Ref. price · indicative, final on quote
Siemens 6ES7241-1CH30-1XB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7241-1CH30-1XB0 — Communication
ParameterValue
Diagnostics functionYes
6ES7241-1CH30-1XB0 — Electrical
ParameterValue
Power loss (typ.)1.5 W
6ES7241-1CH30-1XB0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-40 °C
IP protection degreeIP20
Operating temperature, horizontal install, min.-20 °C
Operating temperature, horizontal install, max.60 °C
Operating temperature, vertical install, max.50 °C
Operating temperature, vertical install, min.-20 °C
6ES7241-1CH30-1XB0 — Mechanical
ParameterValue
Width38 mm
Height62 mm
Depth21 mm

Product details

The 6ES7241-1CH30-1XB0: The module draws 1.5 W typical from the backplane, well within the S7-1200 power budget even on a fully loaded rack. If the panel runs hot and the module is mounted upright, that 50 °C ceiling is the real limit — not the headline 70 °C. Network capacity: supports up to 247 Modbus slave addresses per segment, with a practical limit of 32 devices before a repeater is needed. Cable run up to 1000 m at the standard baud rate. The address range covers 1 through 49999 — standard Modbus addressing, no surprises.

Mounting and approvals

Approvals cover most global jurisdictions: cULus, CE, CSA, UL, FM, KC, marine, and RCM (formerly C-TICK). That means it's accepted in North American, European, Korean, and marine-class installations without separate certification work.

Frequently asked questions

What protocols does this module support?

It supports Modbus RTU (master and slave), USS protocol, and ASCII serial communication. All three are available as library function blocks in TIA Portal, so no custom coding is needed.

What is the ambient temperature range for this module?

The operating range is -40 °C to 70 °C, but derating applies: horizontal installation max is 60 °C, vertical installation max is 50 °C. The lower limit is -20 °C for both orientations.

Will this module drop into a panel designed for a 6ES7221-1BF32-0XB0 without rewiring?

No — the 6ES7221-1BF32-0XB0 is a digital input module (8 DI, 24 VDC), not a communication module. The 6ES7241-1CH30-1XB0 serves a completely different function (RS485 serial comms). They share the same S7-1200 form factor and backplane, but the wiring and configuration are different.

What global approvals does this module carry?

It carries cULus, CE, CSA, UL, FM, KC, marine approval, and RCM (formerly C-TICK). These cover North America, Europe, South Korea, and marine-class installations.

MPN
6ES7241-1CH30-1XB0