CB 1241 communication board RS485 - Industry Mall - Siemens DE

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Automation technology

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Automation Systems

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SIMATIC Industrial Automation Systems

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Controllers

S7-1200

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Communication

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CB 1241 communication board RS485

URL: https://eb.automation.siemens.com/goos/catalog/pages/PrintPreviewProductData.aspx

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Product Information

Overview

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For fast, high-performance serial data exchange via point-to-point connection

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Implemented protocols: ASCII, USS drive protocol, Modbus RTU

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Additional protocols can be loaded later

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Simple parameterization with STEP 7 Basic

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Can be plugged directly into the CPU

Application

The Communication Board CB 1241 RS 485 is used for fast, high-performance serial data exchange via point-to-point connections.

Point-to-point coupling is possible, for example, to:

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SIMATIC S7 automation systems and systems of many other manufacturers

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Printers

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Robot controls

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Modems

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Scanners

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Bar code readers, etc.

The Communication Board CB 1241 RS 485 can be plugged directly into all SIMATIC S7-1200 CPUs.

This provides users with the following advantages:

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Optimal adaptation:

With communication boards, users can optimally adapt their controllers even to more complex tasks.

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Flexibility:

If the task is expanded subsequently, the controller can be upgraded. Updating of the user program is extremely simple.

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Use where space is limited:

The communication boards are directly plugged into the CPU, enabling the controller to be expanded without taking up any additional space.

Function

On the Communication Board CB 1241 RS 485, the following standard protocols are available:

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ASCII:

CB 1241 communication board RS485 - Industry Mall - Siemens DE

For interfacing to third-party systems with simple transmission protocols, e.g. protocols with start and end characters or with block check characters. The interface handshake signals can be queried and controlled via the user program.

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Modbus:

For communication according to the Modbus protocol with RTU format:

❍

Modbus Master:

Master-slave interfacing with SIMATIC S7 as master.

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Modbus slave:

Master-slave interfacing with SIMATIC S7 as slave; message frame traffic from slave to slave not possible.

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USS drive protocol:

Instructions for connection of USS protocol drives are specifically supported. In this case, drives exchange data over RS485. It is then possible to control these drives, and to read and write parameters.

Additional drivers can also be downloaded.

Parameterization

The parameterization of the Communication Board CB 1241 is particularly user-friendly and simple with STEP 7 Basic:

The user specifies the properties of the module by means of a parameterization environment integrated into STEP 7 Basic.

Design

The communication boards are plugged straight into the holder on the front of the S7-1200 CPU.

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Installation:

Communication boards are plugged directly into the SIMATIC S7-1200 CPU and are thus connected electrically and mechanically with the CPU.

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The installation dimensions of the CPU remain unchanged.

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Replacement of all communication boards is facilitated by removable terminals ("permanent wiring").

Technical specifications

Product

type designation

CiR

- Configuration in RUN from

backplane bus 5 V DC, typ.

Power

losses

Power

loss, typ.

Interrupts/diagnostics/status

information

Diagnoses

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Diagnostic

functions

Diagnostics

indication LED

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For

status of the outputs

Climatic

and mechanical conditions for storage and transport

Climatic

conditions for storage and transport

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Free

fall

❍

Drop

height, max. (in packaging)

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Temperature

❍

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Permissible

temperature range

Air

pressure acc. to IEC 60068-2-13

❍

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Permissible

air pressure

Relative

humidity

❍

Permissible

range (without condensation) at 25 °C

Mechanical

and climatic conditions during operation

Climatic

conditions in operation

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Temperature

❍

● permissible

temperature change

Air

pressure acc. to IEC 60068-2-13

❍

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Permissible

air pressure

Pollutant

concentrations

❍

SO2

at RH < 60% without condensation

IP20

Standards,

approvals, certificates

CE

mark

C-TICK

FM

approval

Mechanics/material

Type

of housing (front)

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Plastic

6ES7

CB

95%

5°C

to 55°C, 3°C / minute

1080

to 795 hPa

S02:

< 0.5 ppm; H2S: < 0.1 ppm; RH < 60% condensation-free

Yes

Yes

Yes

Yes

Yes

1241 RS485

50 mA

1.5 W

Yes

Yes

241-1CH30-1XB0

0.3 m;

Five times, in dispatch package

-40°C

to +70°C

1080

to 660 hPa

CB 1241 communication board RS485 - Industry Mall - Siemens DE

Dimensions

and weight

Dimensions

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Width

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Height

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Depth

Weight

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Weight,

approx.

38 mm

62 mm

21 mm

40 g