2. Key Features

• Model: SCP461-11S1 (standard temperature version)

• Architecture: 32‑bit RISC CPU, dual-core safety design

• Safety: IEC 61508 SIL 3, IEC 61511 compliant

• Memory: 256 MB SDRAM / 64 MB Flash

• Processing Speed: Up to 50 kHz safety loop

• Redundancy: 1:1 hot‑swap redundant support

• Communication: Dual Ethernet (10/100 Mbps), RS‑232C, RS‑485

• I/O Capacity: Supports up to 1024 safety I/O points

• Power: 24 V DC ±10%, 12 W typical

• Operating Temp: –20 °C to +40 °C (S1 version)

3. Safety Precautions

• Disconnect 24 V DC power before installation, wiring, or maintenance.

• Install in a 19‑inch EIA rack with adequate ventilation (≥50 mm clearance).

• Separate safety signal cables from non‑safety cables to avoid interference.

• Only qualified safety automation personnel may configure, program, or replace the module.

• Do not open or modify the module; no user‑serviceable parts inside.

• For SIL 3 applications, maintain redundant CPU configuration and periodic proof tests.

4. Installation

4.1 Rack Mounting

1. Insert SCP461-11S1 into a standard 19‑inch rack slot (3U height).

2. Align module rails, push fully into the backplane, and tighten front panel screws.

3. For redundancy, install a second SCP461-11S1 in the adjacent slot.

4. Ensure sufficient airflow; avoid blocking ventilation holes.

4.2 Terminal Wiring

• PWR1/PWR2: 24 V DC (dual power input for redundancy)

• ETH1/ETH2: Ethernet ports for system communication

• RS‑232C: Local configuration port (engineering tool)

• RS‑485: Fieldbus communication (Modbus RTU)

• RED: Redundancy link (connect between primary and secondary CPU)

5. Front Panel Indicators

• PWR (Green): ON = power normal; OFF = no power

• RUN (Green): ON = CPU in run mode; Blinking = self‑test/boot

• ERR (Red): ON = safety fault; Blinking = minor alarm

• RX/TX (Yellow): Flashing = Ethernet/serial activity

• RDY (Green): ON = redundant mode ready (secondary CPU)

6. Basic Operation

Power‑On & Self‑Test

1. Apply 24 V DC power to PWR1/PWR2.

2. Module performs self‑test (~45 seconds): RUN blinks, ERR off.

3. After successful test: RUN steady green; system enters safety run mode.

Redundancy Operation (Dual CPU)

1. Install two SCP461-11S1 modules and connect the RED redundancy cable.

2. Power on both CPUs; primary CPU executes safety logic, secondary synchronizes data.

3. If primary fails, secondary takes over automatically (hot‑swap) with no process interruption.

Configuration

1. Connect PC to RS‑232C or ETH1 port.

2. Use Yokogawa ProSafe‑RS Engineering Software.

3. Set IP address, redundancy mode, safety logic, and I/O parameters.

4. Download configuration to CPU; save to non‑volatile memory.

7. Main Parameters

• CPU Loop Time: 20–1000 µs (configurable)

• Redundancy: Enable/Disable (default: Enable if dual CPU)

• Default IP: 192.168.1.20 (ETH1), 192.168.2.20 (ETH2)

• Subnet Mask: 255.255.255.0

• Gateway: 0.0.0.0 (default)

• RS‑485 Baud Rate: 9600 bps (default)

8. Fault & Error Codes

• E01: Power supply fault (check 24 V DC wiring)

• E02: Safety logic mismatch (re‑download valid config)

• E03: Redundancy link loss (check RED cable)

• E04: Communication fault (Ethernet/RS‑485 cable)

• E05: I/O module fault (check I/O backplane/modules)

• E06: CPU overheating (check ventilation/ambient temp)

9. Specifications

• Model: SCP461-11S1

• Safety Rating: IEC 61508 SIL 3, IEC 61511

• CPU: 32‑bit RISC, dual-core safety

• Memory: 256 MB SDRAM, 64 MB Flash

• Power: 24 V DC ±10%, 12 W

• Operating Temp: –20 °C to +40 °C

• Humidity: 10–90% RH (non‑condensing)

• Dimensions: 130 × 482 × 305 mm (3U, 19‑inch rack)

• Weight: Approx. 5.0 kg

• Certifications: CE, ATEX, IECEx

10. Maintenance

• Keep rack and module clean; avoid dust, moisture, and corrosive gases.

• Check power cables and redundancy cables monthly for tightness.

• Verify Ethernet/RS‑485 connections quarterly.

• Back up safety configuration every 6 months.

• Perform proof test annually for SIL 3 applications (per IEC 61511).