Description
The Siemens 3RK1402-3CE00-0AA2 is a digital I/O expansion module belonging to the SIRIUS AS-Interface (AS-i) SlimLine Compact SC22.5 product family. This flat, space-optimized field module serves as a decentralized routing gateway, capturing inputs from digital binary sensors and driving digital actuators over standard AS-Interface network topologies. The module features four digital inputs and four digital outputs packaged into a 22.5 mm wide DIN-rail housing.
Commercial and Logistics Status
- Condition: New Original (Factory Sealed)
- Warranty: 12-Month Comprehensive Warranty
- Availability: In Stock
- Lead Time: Ships within 1–2 business days from inventory validation
- Pricing Note: Market conditions influence local automation component costs. Contact our corporate procurement desk directly for a firm, project-specific quotation.
Technical Specifications
| Parameter | Value / Specification |
| Manufacturer | Siemens |
| Product Brand | SIRIUS / AS-Interface |
| Model Number | 3RK1402-3CE00-0AA2 |
| Module Type | SlimLine Compact SC22.5 Digital I/O Module |
| Design of the Product | 4 Inputs / 4 Outputs |
| AS-i Slave Profile | S-7.A.7 (A/B Slave capable) |
| AS-i Voltage Range | 26.5 to 31.6 V DC (via AS-i cable) |
| Total Current Consumption | \le 270 mA (from AS-i network under full load) |
| Digital Input Type | 2-wire and 3-wire PNP sensors (PNP type 2 compliant) |
| Input Switching Level | High: \ge 10 V; Low: \le 5 V |
| Digital Output Type | Solid-state electronic (PNP sourcing configuration) |
| DC Output Current Rating | 1 A per output at 24 V DC (Max aggregate total 3 A) |
| Auxiliary Power Supply | 24 V DC (\pm15 % via auxiliary black ribbon cable) |
| Connection Technology | Screw-type terminals |
| Mounting Configuration | 35 mm standard DIN rail snap-mounting |
| Ingress Protection | IP20 conforming to IEC 60529 |
| Operating Temperature | −25 to +70 °C (−13 to +158 °F) |
System Architecture and Device Addressing
A/B Slave Profiling
The 3RK1402-3CE00-0AA2 utilizes an expanded AS-i addressing profile (S-7.A.7). This enables system engineers to assign up to 62 A/B type slaves on a single AS-i master gateway segment, rather than the traditional 31 standard slave node limit. The addressing steps are written to the module via an external handheld AS-i addressing unit or programmed dynamically via the master hardware configuration software manager (e.g., TIA Portal).
Electrical Power Segregation
To optimize network stability, the module completely isolates its data transmission path from the physical drive power lines:
- Yellow AS-i Cable: Carries network data communication and feeds low-power logic circuitry along with the four digital input sensors.
- Black Auxiliary Cable (24 V DC): Connects to the module to supply auxiliary power for the four 1 A digital outputs. This external supply configuration ensures that inductive actuator line noise or sudden output short circuits will not cause a voltage drop on the primary AS-i data bus line.
Installation, Connection, and Commissioning
- Terminal Terminal Mechanics: Connect using standard single-conductor or finely stranded cables up to a maximum cross-section of 2.5 mm² (14 AWG). Tighten terminal screws with a calibrated torque driver to a specification between 0.5 and 0.6 Nm to prevent physical thread strip or high-resistance loose connections.
- Diagnostic LED Tracking: The module faceplate incorporates clear diagnostic indicator paths:
- FAULT LED (Red): Continuous red illumination indicates a total loss of AS-i communication or a duplicate node address collision on the network run.
- AS-i LED (Green): Confirms stable AS-i bus voltage potential is present at the input terminals.
- IN/OUT LEDs (Yellow): Reflect the immediate status of individual input and output data points.
- Surge Suppressors: When driving highly inductive loads, such as large DC contactor coils or solenoid valves, place external freewheeling diodes directly across the actuator load terminals. Unsuppressed inductive flyback spikes can cause premature degradation of the internal PNP solid-state switches.
