Connection Examples

Overview

The following sections list typical connection examples, which only represent some of the possible wiring methods. You must consider the error detection listed in the respective examples.

WARNING
	UNINTENDED EQUIPMENT OPERATION Be sure that your risk assessment takes into account errors which are undetectable by the Safety I/O module, and that appropriate additional measures are implemented according to your risk assessment. Failure to follow these instructions can result in death, serious injury, or equipment damage.

For more information regarding error detection, refer to the sections described in Error Detection.

NOTE: For information on the Enabling Principle and Restart Behavior, refer to the I/O configuration in EcoStruxure Machine Expert / EcoStruxure Machine Expert - Safety.

Connecting Safety-Oriented Actuators

Safety-related actuators (contactors, motors, muting lamps, valves) that are compatible with output module performance data may be connected directly. With this connection, the module corresponds to Category 4 according to EN ISO 13849. This only applies to the module and not to the wiring presented.

WARNING
	NON-CONFORMANCE TO SAFETY FUNCTION REQUIREMENTS Wire the actuator in accordance with the required category and features of the actuator. Failure to follow these instructions can result in death, serious injury, or equipment damage.

For the TM5SDO2TFS, TM5SDO2TAFS, TM5SDO4TFS and TM5SDO4TAFS modules, the output channels also de-energize the load on the COM side. Verify whether the actuators you have connected permit the disconnection from the COM side.

WARNING
	UNINTENDED EQUIPMENT OPERATION Verify that the I/O modules are compatible with the actuators that are connected. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING
	UNINTENDED EQUIPMENT OPERATION Be sure that your risk assessment takes into account errors which are undetectable by the Safety I/O module, and that appropriate additional measures are implemented according to your risk assessment. Failure to follow these instructions can result in death, serious injury, or equipment damage.

With this wiring, the modules detect following errors:

Error	Error at output
	`DisableOSSD`= No		`DisableOSSD`= Yes-ATTENTION
	De-energized	Energized	De-energized	Energized
Ground error on `SO n+`
TM5SDO•FS	not detected	detected	not detected	detected
Ground error on `SO n-`
TM5SDO•TFS, TM5SDO•TAFS	not detected	detected	not detected	not detected
`SO n+` short-circuit with 24 Vdc
TM5SDO•TFS, TM5SDO•TAFS	detected	detected	detected	not detected
TM5SDO6TBFS	detected ¹⁾	not detected	detected ¹⁾
TM5SDM8TBFS		detected ¹⁾
TM7SDM12DTFS		detected ¹⁾
`SO n-` short-circuit with 24 Vdc
TM5SDO•TFS, TM5SDO•TAFS	detected	detected	detected	detected
`COM` short-circuit with 24 Vdc
TM5SDO6TBFS	not detected	not detected	not detected	not detected
TM5SDM8TBFS
TM7SDM12DTFS
Short circuit between `SO n+` and the other signal (high)
TM5SDO•TFS, TM5SDO•TAFS	detected	detected	detected	not detected
TM5SDO6TBFS	detected ¹⁾	not detected	detected ¹⁾
TM5SDM8TBFS		detected ¹⁾
TM7SDM12DTFS		detected ¹⁾
Short circuit between `SO n-` and the other signal (high)
TM5SDO•TFS, TM5SDO•TAFS	detected	detected	detected	not detected
Short circuit between `COM` and the other signal (high)
TM5SDO6TBFS	not detected	not detected	not detected	not detected
TM5SDM8TBFS
TM7SDM12DTFS
Broken wire
TM5SDO•TFS, TM5SDO•TAFS	not detected	not detected²⁾	not detected	not detected²⁾
TM5SDO6TBFS		not detected		not detected
TM5SDM8TBFS
TM7SDM12DTFS
Short circuit between `SO n+` and `SO n-`
TM5SDO•TFS, TM5SDO•TAFS	not detected	detected	not detected	detected
¹⁾ Short-circuits on `SO n` caused by high potentials will be detected by the modules, however the connected actuator cannot be de-energized due to the positive power switching design of the channel. ²⁾ Broken wire can be acknowledged via the `CurrentOk` signal. However, this signal cannot be used for safety purposes.

With this wiring, the TM5SPS10FS, TM5SDO6TBFS, TM5SDM8TBFS and TM7SDM12DTFS modules have the following error detection:

Error	Error at Output
Error	De-energized	Energized
Ground error on `SO x`	not detected	detected
`SO x` short-circuit with 24 Vdc	detected¹⁾	detected¹⁾ NOTE: This error is not detected for TM5SDO6TBFS.
COM short-circuit with 24 Vdc	not detected	not detected
Short circuit between `SO x` and the other signal (high)	detected¹⁾	detected¹⁾ NOTE: This error is not detected for TM5SDO6TBFS.
Short circuit between COM and the other signal (high)	not detected	not detected
Broken wire	not detected	not detected¹⁾
¹⁾ Short-circuits on `SO x` caused by high potentials will be detected by the modules, however the connected actuator cannot be de-energized due to the positive power switching design of the channel.

NOTE: With DisableOSSD set to Yes-ATTENTION, the modules have reduced error detection capabilities and no longer meet the requirements of SIL 3 according to IEC 62061, nor PL e according to ISO 13849. If you have set the parameter as such, you need to review the cited standards for more information in regards to your responsibilities.

Invalid Connection of an Actuator for Type A Outputs

The information on invalid connection of an actuator applies to the following modules:

TM5SDO2TFS
TM5SDO2TAFS
TM5SDO4TFS
TM5SDO4TAFS

Directly connecting an actuator from +24 Vdc to SO n-, or connecting SO n+ to an actuator, and then to the external ground is invalid. These types of wiring errors will not be detected by the modules.

WARNING
	INOPERATIVE SAFETY-RELATED FUNCTIONALITY Do not directly connect an actuator from +24 Vdc to `SO n-`. Do not directly connect an actuator from `SO n+` to an external ground connection. Failure to follow these instructions can result in death, serious injury, or equipment damage.

Make all necessary repairs in a timely manner if an error occurs because subsequent errors could create a hazardous situation.

WARNING
	UNINTENDED EQUIPMENT OPERATION Immediately replace any and all modules that indicate that they are in an inoperable state. Ensure that the effect on un-repaired equipment is taken into account in your risk assessment. Make all necessary repairs to equipment before re-starting, or continuing service of, your machine. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

UNINTENDED EQUIPMENT OPERATION

Immediately replace any and all modules that indicate that they are in an inoperable state.
Ensure that the effect on un-repaired equipment is taken into account in your risk assessment.
Make all necessary repairs to equipment before re-starting, or continuing service of, your machine.

Failure to follow these instructions can result in death, serious injury, or equipment damage.