Siemens 3RK3122-1AC00 Safety Central Unit
MPN3RK3122-1AC00
NRND
SIRIUS, Central unit 3RK3 ASIsafe Extended for modular Safety system 3RK3 2/4 F-DI, 4 DI, 1 F-RO, 1 F-DO,24 V DC Monitoring of ASI slaves Control of 10 safe outputs on AS-Interface bus parameterizable using software Safety ES 45 mm width screw terminal Up to SIL3 (IEC 61508) Up to Performance Level E (ISO 13849-1) 2 extension modules connectable
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | Central unit |
| Product design / configuration | 2/4 F-DI, 4 DI, 1 F-RO, 1 F-DO |
Safety ratings
| Parameter | Value |
|---|---|
| Safety integrity level (IEC 61508) | SIL CL 3 |
| Category (EN ISO 13849-1) | 4 |
| PFHd, high demand rate (EN 62061) | 7E-9 1/h |
| Hardware fault tolerance (IEC 61508) | 1 |
| Stop category (EN 60204-1) | 0 / 1 |
Monitoring & inputs
| Parameter | Value |
|---|---|
| Emergency-off circuit monitoring | Yes |
| Protective door monitoring | Yes |
| Position switch monitoring | Yes |
| Valve monitoring | Yes |
| Monitored start-up | Yes |
Outputs & contacts
| Parameter | Value |
|---|---|
| Max. operating frequency | 1 000 1/h |
Electrical
| Parameter | Value |
|---|---|
| Rated insulation voltage | 300 V |
| Rated surge voltage withstand | 2 500 V |
Connection
| Parameter | Value |
|---|---|
| Type of electrical connection | screw-type terminals |
| Conductor cross-section, solid | 20 ... 14 |
| Conductor cross-section, stranded | 20 ... 14 |
Mechanical
| Parameter | Value |
|---|---|
| Touch protection against electric shock | finger-safe |
| Fastening method | Snap-mounted to DIN rail or screw-mounted with additional push-in lug |
| Mounting position | vertical |
| Width | 45 mm |
| Height | 111 mm |
| Depth | 124 mm |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature range | -20 ... +60 °C |
| Storage temperature range | -40 ... +85 °C |
| Installation altitude, max. | 2 000 m |
| Shock resistance | 15g / 11 ms |
| Vibration resistance (IEC 60068-2-6) | 5 ... 500 Hz: 0.75 mm |
| Air pressure (SN 31205) | 70 ... 106 kPa |
MPN
3RK3122-1AC00