Honeywell RTU2020 SC-UCNN11 Redundant Controller Module

Honeywell RTU2020 / SC‑UCNN11
SC-UCNN11 is a redundant controller module within the Honeywell ControlEdge RTU2020 (also known as RTU2020) platform. Its full model name is: ControlEdge 2020 Redundant Controller.

I. Positioning and Usage
Series: ControlEdge RTU2020 (Original RTU2020) – Honeywell
Component: SC-UCNN11 = Redundant Controller (Redundant Controller)
Application: Remote monitoring and control for remote / remote location sites in industries such as oil and gas, water supply, energy, and mining (typical RTU scenario)
Features: Dual-unit hot standby redundancy, wide temperature range, low power consumption, supports solar power supply, remote maintenance
II. Model Analysis (SC-UCNN11)
SC: ControlEdge Series
U: RTU2020 Platform
C: Controller
NN: Redundant Configuration
11: Version / Hardware Variant

Hardware Specifications (SC-UCNN11) Electrical
Power supply: 24 VDC ±25% (18–30 VDC) Power consumption:
No expansion I/O: 5.76–6.72 W
With 9 IOMs: Approximately 6.96 W
Maximum current: 1.3 A @ 30 VDC (redundant + 9 IOMs)
Processor and Memory
Architecture: 32-bit ARM (industrial-grade real-time kernel)
Memory: Standard Flash/RAM, supports power-on retention
Communication Interfaces (Front Panel)

2 × Ethernet (10/100 Mbps): for SCADA / upper computer, redundant communication
2 × USB 3.0: local configuration, firmware upgrade
3 × Serial ports (RS-232/RS-485 configurable): Modbus, DNP3, IEC 61850, etc.
I/O (controller body)
Digital input: 16 channels, 24 VDC
Digital output: 8 channels, 24 VDC / 0.5 A
Analog input: 8 channels, 16 bits, 0–10 V / 4–20 mA
Analog output: 4 channels, 12 bits, 4–20 mA
Environment and mechanics
Operating temperature: −40°C … +70°C (wide temperature range, suitable for outdoor use)
Humidity: 5–95% RH, no condensation
Dimensions: 190 × 170 × 141 mm
Weight: Approximately 1 kg
Installation: DIN rail / panel mounting