Siemens 6ES7460-0AA01-0AB0 SIMATIC S7-400 IM 460-0 Send Interface Module
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Product Information
The Siemens 6ES7460-0AA01-0AB0 is a SIMATIC S7-400 IM 460-0 send interface module engineered for local hardware expansion in SIMATIC S7 PLC systems. Occupying a single rack slot, this interface module enables a central controller to communicate with up to 8 local expansion racks over a maximum connecting line distance of 5 meters. Operating from the backplane bus with a current consumption of 140 mA at 5 V DC and a low power dissipation of 0.7 W, the module directly transfers parallel peripheral bus (P-bus) communication from the central rack to connected secondary racks.
Integrating the 6ES7460-0AA01-0AB0 into a control architecture requires connecting 6ES7468 cables to a companion IM 461-0 receive module (6ES7461-0AA01-0AA0) installed in each expansion rack. Replacing an existing unit is straightforward because the module requires no individual software parameterization or direct programming; system configuration is stored on the S7-400 CPU and managed via STEP 7 V5.x HW Config or TIA Portal STEP 7 Professional. Because the IM 460-0 does not transmit 5 V DC backplane power or communication bus (C-bus) signals, each expansion rack must have its own power supply module, such as a Siemens PS 405 or PS 407. Maintenance technicians sourcing replacement hardware through ABC Industrial Parts can perform a direct module swap once line wiring and rack power are established.
Diagnostic information is made visible through front-panel status LEDs that indicate operational status and line conditions. The INTF indicator signals an internal hardware error within the module, while the EXTF indicator illuminates for external faults such as an expansion bus line failure, disconnected cable, power loss on a connected rack, or missing terminating resistor. Beyond visual status on the front plate, system-level rack failures trigger OB86 interrupt organization blocks logged within the S7-400 CPU diagnostic buffer and monitored via TIA Portal online diagnostics. Internal hardware failures represented by a solid INTF LED are non-repairable in the field, making a tested replacement module from ABC Industrial Parts the quickest solution to eliminate line interruptions.
Technical Specifications
| Manufacturer | Siemens |
| Part Number | 6ES7460-0AA01-0AB0 |
| Model / Type | IM 460-0 Send Interface Module |
| Product Family | SIMATIC S7 |
| Series | S7-400 |
| Component Type | Interface Module |
| Required Slots | 1 |
| Backplane Current Consumption (5 V DC) | 140 mA |
| Power Dissipation | 0.7 W |
| Maximum Cable Distance | 5 m |
| Maximum Expansion Racks | 8 |
| P-Bus Transmission | Supported |
| C-Bus Transmission | Not Supported |
| 5 V DC Power Transmission | Not Supported |
Programming and Configuration
The Siemens 6ES7460-0AA01-0AB0 interface module does not require individual user programming or local parameter download. Module identification and rack expansion parameters are defined within the central S7-400 CPU configuration using standard Siemens engineering software, including STEP 7 V5.x HW Config or TIA Portal STEP 7 Professional.
When replacing a failed unit, no software tools are needed to program the spare module directly. Once inserted into the assigned slot of the central rack, the S7-400 CPU automatically coordinates communication with the connected expansion racks according to the hardware layout defined in the central project.
Communication and System Integration
The IM 460-0 send interface module extends the S7-400 central rack communication infrastructure across multi-rack PLC system topologies within single or adjacent control cabinets. It transmits the parallel peripheral bus (P-bus) signal directly across distances of up to 5 meters using Siemens 6ES7468 connecting cables. Up to 8 expansion racks can be linked from a central rack housing the send module.
To complete the communication topology, each targeted expansion unit must be fitted with a SIMATIC S7-400 IM 461-0 receive module (6ES7461-0AA01-0AA0). System designers and technicians must note that while P-bus lines are extended, the IM 460-0 does not transfer C-bus communication or 5 V DC backplane power. Consequently, every connected expansion rack requires an independent power supply unit, such as a PS 405 or PS 407 module.
Diagnostics and Status Indication
Comprehensive hardware and bus diagnostics are available both visually on the module faceplate and through central software monitoring tools. The module features two LED indicators, INTF and EXTF, providing immediate status assessment during installation and operation.
When system faults occur, the S7-400 CPU captures rack-level communication events in its diagnostic buffer, raising OB86 interrupt events to signal rack failure or bus disconnection. Detailed real-time line state monitoring and error tracking can be accessed online through TIA Portal Online & Diagnostics or STEP 7 diagnostic views.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| INTF | Solid | Internal Fault: Module internal hardware fault or internal error requiring module replacement |
| EXTF | Solid | External Fault: Line fault on expansion bus, cable disconnected, connected expansion rack power failure, or missing terminating resistor |
Replacement and Spare Part Considerations
Replacing a 6ES7460-0AA01-0AB0 interface module is a direct mechanical and electrical swap. Because the module holds no local memory or firmware project, no parameter backups or transfer tools are required during replacement.
Before putting a replacement module into service, verify that all 6ES7468 connecting cables are securely latched and that bus termination resistors are correctly positioned. Ensure that all linked expansion racks have functional power supplies (PS 405 or PS 407) and operating IM 461-0 receive modules, as external power loss on connected racks will trigger an EXTF condition on the send module.
Frequently Asked Questions
Does replacing the Siemens 6ES7460-0AA01-0AB0 require memory transfer or software programming?
No, the module requires no individual programming or local parameter store. The S7-400 CPU handles all hardware configuration settings defined in STEP 7 or TIA Portal upon power-up.
How many expansion racks can be connected using the IM 460-0 send interface module?
A single IM 460-0 send module can connect up to 8 local expansion racks over a maximum total cable distance of 5 meters.
Can the 6ES7460-0AA01-0AB0 supply 5 V DC backplane power to connected expansion racks?
No, the module does not transmit 5 V DC backplane power or C-bus communication. Each connected expansion rack requires its own power supply module, such as a PS 405 or PS 407.
What companion receive module and cables are required for this send module?
The IM 460-0 connects to SIMATIC S7-400 IM 461-0 receive modules (6ES7461-0AA01-0AA0) using Siemens 6ES7468 connecting cables.
What do the INTF and EXTF status LEDs indicate?
INTF indicates an internal module hardware error requiring replacement. EXTF indicates external faults such as expansion bus line issues, disconnected cables, missing bus terminators, or power failure on a connected expansion rack.
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Disclaimer:
We are not an authorised distributor of Siemens.
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