HACH SC4500 Universal Controller
| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Model | SC4500 |
| Display | 3.5" TFT capacitive color touchscreen |
| Operating Temperature | −20–60°C (8 W AC / 9 W DC sensor load) or −20–45°C (28 W AC / 20 W DC sensor load) |
| Storage Conditions | −20–70°C, 0–95% RH non-condensing |
| Sensor Channels | Dual-channel for SC-series sensors |
| Relays | 2 SPDT relays (0.75–1.5 mm² / 18–16 AWG) |
| AC | 100–240 VAC, 5 A resistive / 1 A pilot |
| DC | ≤42 VDC, 4 A resistive / 1 A pilot |
| Analog I/O | Up to 5 × 0–20 mA or 4–20 mA outputs per module |
| Digital Communication Options | Modbus RS485, Profibus DPV1, Modbus TCP, PROFINET IO, EtherNet/IP |
| USB Port | For firmware update and data export |
| Data Storage | ~20,000 records |
| Enclosure Rating | UL 50E Type 4X, IEC/EN 60529 IP66, NEMA 250 Type 4X, corrosion-resistant metal housing |
| Power Supply | AC 100–240 VAC ±10%, 50/60 Hz, 1 A (28 W load) |
| Dimensions | 144 × 144 × 192 mm |
| Weight | 1.7 kg (controller only) |
| Certifications | CE, ETL, UL, CSA |
Overview
The HACH SC4500 Universal Controller is an industrial-grade, dual-channel process monitoring and control platform engineered for high-reliability operation in demanding water, wastewater, and industrial process environments. Designed as a direct functional and mechanical successor to the SC200 series, the SC4500 retains identical mounting footprint and panel cutout dimensions—enabling seamless retrofit installation without infrastructure modification. Its core architecture integrates real-time sensor signal conditioning, programmable logic control, multi-protocol communication, and embedded prognostic analytics into a single compact unit. The controller operates on a deterministic embedded Linux-based firmware stack, ensuring consistent response latency and deterministic I/O timing critical for closed-loop process regulation. It supports HACH’s full range of SC-series digital sensors—including pH, ORP, conductivity, dissolved oxygen, turbidity, chlorine, ozone, and ammonium—leveraging proprietary digital sensor interface protocols with built-in sensor health validation and automatic calibration verification.
Key Features
- Dual-channel SC-series sensor compatibility: Simultaneously interfaces with two HACH SC-series digital sensors using secure, noise-immune digital bus communication—eliminating analog signal degradation and enabling plug-and-play sensor replacement with auto-configuration.
- Prognosys predictive diagnostics engine: Embedded firmware continuously monitors sensor performance metrics (e.g., electrode impedance, optical window fouling index, membrane response time), generating actionable maintenance alerts and step-by-step service guidance via the MSM (Maintenance Support Module) interface—reducing unplanned downtime by up to 40% in validated field deployments.
- Modular communication architecture: Supports native integration into legacy and modern automation infrastructures via optional field-installable communication modules: Modbus RS485 (RTU/ASCII), Profibus DPV1, Modbus TCP, PROFINET IO, and EtherNet/IP—all certified to IEC 61784-1 and compatible with major PLC vendors (Siemens, Rockwell Automation, Schneider Electric).
- Industrial-grade human-machine interface (HMI): 3.5-inch capacitive color touchscreen with glove-compatible operation, sunlight-readable brightness (500 cd/m²), and intuitive icon-driven navigation—designed for rapid parameter configuration, real-time trend visualization, and alarm acknowledgment under plant-floor conditions.
- Robust power and environmental resilience: UL Type 4X / IP66-rated aluminum alloy enclosure with electrophoretic coating resists chemical splashes, dust ingress, and mechanical impact; wide operating temperature range (−20°C to +60°C) ensures stable operation in outdoor enclosures, pump stations, and chemical dosing skids.
Sample Compatibility & Compliance
The SC4500 is validated for continuous operation with all HACH SC-series digital sensors compliant with IEC 61508 SIL 2 functional safety requirements for process instrumentation. It meets electromagnetic compatibility standards per IEC 61326-1 (industrial environment), surge immunity per IEC 61000-4-5 (Level 3), and fast transient burst immunity per IEC 61000-4-4 (Level 3). All hardware and firmware versions are qualified under FDA 21 CFR Part 11 for electronic records and signatures when deployed with audit-trail-enabled software configurations. The controller supports GLP/GMP-compliant data integrity practices through time-stamped event logging, user-access-controlled configuration changes, and tamper-evident data export via encrypted USB transfer.
Software & Data Management
Firmware v3.2+ includes embedded data historian capable of storing approximately 20,000 timestamped measurement records with configurable sampling intervals (1 second to 24 hours). Data export is supported via USB mass-storage mode (FAT32 formatted drives) in CSV format, preserving ISO 8601 timestamps and sensor metadata. Optional HACH Insight™ cloud connectivity enables secure TLS 1.2–encrypted telemetry transmission to enterprise SCADA or MES platforms. Local configuration and diagnostics are managed via the integrated web server (HTTP/HTTPS), accessible from any standards-compliant browser—no proprietary client software required. Firmware updates are digitally signed and verified during installation to ensure supply-chain integrity.
Applications
- Drinking water treatment: Real-time monitoring and feedback control of disinfectant residual (free/total chlorine), pH correction, and coagulant dosing based on turbidity and conductivity trends.
- Wastewater biological treatment: Dissolved oxygen cascade control in activated sludge basins; ammonium/nitrate profiling in denitrification zones.
- Industrial cooling towers: Conductivity-based blowdown control, biocide dosing synchronization with ORP thresholds, and corrosion inhibitor monitoring.
- Food & beverage process lines: Sanitary CIP cycle verification via conductivity and pH transitions; post-rinse chlorine validation for microbial safety compliance.
- Chemical manufacturing: Batch reaction endpoint detection using multi-parameter correlation (pH + ORP + temperature) and automated valve actuation via relay outputs.
FAQ
Does the SC4500 support analog sensors?
No—the SC4500 is designed exclusively for digital SC-series sensors. Analog sensor integration requires external signal conditioners or migration to compatible HACH digital sensor models.
Can existing SC200 sensor cables be reused with the SC4500?
Yes—mechanical and electrical pinout compatibility is maintained across SC200 and SC4500 controllers, allowing full reuse of installed sensor cabling and junction boxes.
Is remote firmware update possible over Ethernet?
Yes—when configured with Modbus TCP or EtherNet/IP modules, firmware updates can be initiated remotely via HTTPS or FTPS using HACH-provided update packages and digital signature verification.
What is the maximum number of analog outputs supported?
Up to five 4–20 mA outputs per installed analog output module, with support for up to two modules—yielding a total of ten analog outputs when both slots are populated.
How does Prognosys differ from standard sensor diagnostics?
Unlike basic fault-flagging diagnostics, Prognosys applies statistical process modeling to long-term sensor behavior, identifying gradual drift, coating accumulation, or electrolyte depletion before measurement error exceeds specification limits—enabling scheduled intervention rather than reactive repair.
