6ES7137-6BD00-0BA0 Siemens SIMATIC ET 200SP CM 4xIOLink ST


  • 6ES7137-6BD00-0BA0
  • CM 4xIO-Link ST
  • Communication module
  • IO-Link ports: 4
  • Protocols 1.0/1.1
  • COM 1/COM 2/COM 3
  • 24 V DC
  • Colour code: CC04
  • Suitable for BU type A0

Siemens SIMATIC ET 200SP CM 4xIO-Link ST – 6ES7137-6BD00-0BA0


  • CM 4x IO-Link communications module
    Serial communication module for connecting up to 4 IO-Link devices in accordance with IO-Link specification V1.0 and V1.1. The IO-Link parameters are configured using the Port Configuration Tool (PCT), version V3.0 and higher
  • Time-based IO
    Time-based IO ensures that signals are output with a precisely defined response time. By combining inputs and outputs, for example, passing products can be accurately measured or fluids dosed in precise quantities
  • Supported data transfer rates
    • COM1 (4.8 kbps)
    • COM2 (38.4 kbps)
    • COM3 (230.4 kbps)
  • Expansion limits
    • Length of cable: Max. 20 m
    • Max. 32 bytes of input and output data per port
    • Max. 144 bytes of input data and 128 bytes of output data per module
  • Supported ET 200SP system functions
    • Replacement without PG with automatic backup without the engineering tool of the IO-Link device parameters (V1.1 devices only) and the IO-Link master parameters by means of redundant saving of parameters on the e-coding element
    • Re-parameterization during operation
    • Identification data I&M
    • Firmware update
    • PROFIenergy
  • Can be plugged into Type A0 BaseUnits (BU) with automatic e-coding
  • LEDs
    • DIAG: Operating state indicator (green/red) of the module
    • C1..C4: Port status indicator (green) for Port 1, 2, 3 and 4
    • Q1..Q4: Channel status indicator (green) for Port 1, 2, 3 and 4
    • F1..F4: Port fault indicator (red) for Port 1, 2, 3 and 4
    • PWR: Supply voltage indicator (green)
  • Clear labeling on front of module
    • Plain text identification of the module type and function class
    • 2D matrix code (order and serial number)
    • Connection diagram
    • Color-coding of the CM module class: silver
    • Hardware and firmware version
    • Complete Article No.
  • Optional accessories
    • Labeling strips
    • Equipment labeling plates
    • Color-coding plate with color code CC04
  • Optional system-integrated shield connection

Overview of CM 4 x IO-Link

Overview of BaseUnits


  • The CM 4x IO-Link communication module enables data exchange with up to 4 external IO-Link devices via one 3-wire cable each.
  • Comprehensive parameterization options make it possible to adapt the controller flexibly to the communication partner.
  • Thanks to the compatibility of IO-Link with standard sensors, commercially available sensors in accordance with IEC 61131 Type 1 can also be operated on the IO-Link master.


Usable BaseUnits (BU)

All BUs of type A0 are available for the communication module CM 4x IO-Link.

Load group formation

A light-colored BU separates the self-assembling, internal voltage buses (P1, P2, AUX) and thus opens a new load group. The power supply of a load group must be fed in at the light BU of this load group.

A dark BU forwards the power supply of the adjacent light BU on the left via the self-assembling voltage buses P1, P2 and AUX. A new infeed is therefore only required on the next light BU to the right. The setting of a further light BU is required whenever

  • a new load group is to be formed (for example, for isolating the supply voltage from module groups) or
  • the maximum current simultaneously required by the load group exceeds the permissible limit of 10 A.
Color identification of the terminals

The potentials at the terminals of the BaseUnit are defined by the inserted I/O module in each case. To prevent wiring faults, the potentials of the terminals can optionally be identified by means of module-specific color-coded labels. The color-coded label that matches the respective I/O module is defined by the color code CCxx of the I/O module. This color code is also printed on the front of the module.

For the communications module “CM 4x IO‑Link”, the color-coding label with the color code CC04 is to be used.

In BaseUnits with the additional ten internally jumpered AUX terminals, these can also be identified with color-coded labels. For the ten AUX terminals, color-coded labels are available in red, blue, and yellow/green.


Labeling strips

Labeling strips can be inserted on the front of the interface modules or I/O modules and individually labeled via STEP 7, macros, etc. No special additional holder is required. If required, they can be easily replaced with the component.

Equipment labeling plates

Equipment labeling plates enable the equipment to be easily identified (e.g. compliant with EN 81346). They are easily plugged onto the required component (interface modules, I/O modules and BaseUnits) and when required, they can be easily replaced with the component.

The following labeling components are available:

  • Film labeling strips, light-gray, roll with 500 strips, perforated, for thermal transfer printers
  • Film labeling strips, yellow, roll with 500 strips, perforated, for thermal transfer printers
  • Card labeling strips (180 g/m2), light gray, DIN A4 sheets with 100 strips each, perforated, for laser printer
  • Card labeling strips (180 g/m2), yellow, DIN A4 sheets with 100 strips each, perforated, for laser printer
  • Equipment labeling plates, white, ten sheets each with 16 labels, for thermal transfer card printers or labels
System-integrated shield connection

For the space-saving and EMC-optimized connection of cable shields, a shield connection is available that is quick and easy to mount. This consists of one shield connection element that can be plugged onto the BaseUnit and one shield terminal for each module. The low-impedance connection to the functional ground (DIN rail) is achieved without any additional wiring by the user.

Technical specifications



SIMATIC ET 200SP, CM 4xIO-Link ST Communication module IO-Link Master V1.1


DataSheet in PDF

Weight 0.040 kg
Dimensions 6.50 × 7.70 × 2.30 mm


Product type designation

CM 4 x IO-Link ST

HW functional status

from FS04

Firmware version

● FW update possible


usable BaseUnits

BU type A0

Color code for module-specific color identification plate


● I&M data

Yes; I&M0 to I&M3

● Isochronous mode

No; Only for PROFINET and configuration as version with FW V2.0 or V2.1

● STEP 7 TIA Portal configurable/integrated from version

STEP 7 V15 or higher

● STEP 7 configurable/integrated from version

STEP 7 V5.5 or higher

● PROFIBUS from GSD version/GSD revision

One GSD file each, Revision 3 and 5 and higher

● PROFINET from GSD version/GSD revision


Rated value (DC)

24 V

permissible range, lower limit (DC)

19.2 V; 20.5 V if IO-Link is used, as the supply voltage for IO-Link devices has to be at least 20 V at the master.

permissible range, upper limit (DC)

28.8 V

power supply according to NEC Class 2 required


Current consumption, max.

45 mA; without load

Number of outputs


● Rated value

200 mA; Per channel

● Short-circuit protection


Power loss, typ.

1 W

● unshielded, max.

20 m; Also applies for shielded cables

Number of ports


● of which simultaneously controllable


Transmission rate

4.8 kBaud (COM1); 38.4 kBaud (COM2), 230.4 kBaud (COM3)

Cycle time, min.

2 ms; dynamic, depending on user data length

Size of process data, input per port

32 byte; max.

Size of process data, input per module

144 byte; max.

Size of process data, output per port

32 byte; max.

Size of process data, output per module

128 byte; max.

Memory size for device parameter

2 kbyte; for each port

Master backup


Configuration without S7-PCT


Cable length unshielded, max.

20 m

● DI


● DQ

Yes; max. 100 mA per channel

● Port type A


● Port type B

Yes; 24 V DC via external terminal

● via three-wire connection


● Diagnostic alarm

Yes; The port diagnosis is available in the IO-Link mode only.

● Monitoring the supply voltage


● Wire-break


● Short-circuit


● Group error


● Monitoring of the supply voltage (PWR-LED)

Yes; green PWR LED

● Channel status display

Yes; one green LED for channel status Qn (SIO mode) and port status Cn (IO-Link mode) per channel

● for channel diagnostics

Yes; red Fn LED

● for module diagnostics

Yes; green/red DIAG LED

● between the channels


● between the channels and backplane bus


● between the channels and the power supply of the electronics


Isolation tested with

707 V DC (type test)

● horizontal installation, min.

-30 °C

● horizontal installation, max.

60 °C

● vertical installation, min.

-30 °C

● vertical installation, max.

50 °C

● Installation altitude above sea level, max.

2 000 m; On request: Installation altitudes greater than 2 000 m


13 mm


73 mm


58 mm

Weight, approx.

30 g

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