PRISM 4xFAN Controller logoThermal Management

4xFAN
Controller

High-Precision Telecom-Grade Thermal Management

Four independent fan channels, dual-zone temperature sensing, and RS232 command intelligence — engineered to keep mission-critical infrastructure cool, quiet, and operational around the clock.

4x
Fan Channels
Dual
Temp Zones
RS232
Interface
PRISM 4xFAN Controller enclosure
Core Capabilities

Engineering-Grade Features

Individual Fan Logic

Independent control of up to 4 DC fans with configurable RPM profiles. Staged activation reduces mechanical wear and extends MTBF.

Universal Fan Compatibility

Full support for 2-wire (voltage-controlled), 3-wire PWM, and 4-wire PWM (signal-controlled) DC fans. Total hardware flexibility.

Dual-Zone Temperature Monitoring

Dual digital temperature probes: one for solar loading (external/ambient) and one for internal heat dissipation. Holistic enclosure climate control.

Advanced RS232 Connectivity

Dedicated RS232 interface for real-time performance monitoring and custom thermal profile programming.

Integrated System Override

Two dry-contact hardwire inputs + RS232 logic for third-party SCADA or PLC control during maintenance or testing.

Critical Power Protection

External emergency shutdown for integration with power management systems (Low Voltage Disconnects). Prevents fans draining battery banks during critical power failures.

Technical Specification

Universal Fan Compatibility

Full support across all standard DC fan configurations

2-Wire
Voltage Controlled
Pin Layout
1
POWER
2
GND

Speed controlled via supply voltage variation. Simple, robust, wide industry adoption.

2-conductor interface
3-Wire
PWM Signal
Pin Layout
1
POWER
2
GND
3
TACH

Voltage-speed control with tachometer feedback. Real-time RPM monitoring for fault detection.

3-conductor interface
4-Wire
Full PWM Control
Pin Layout
1
POWER
2
GND
3
TACH
4
PWM

Dedicated PWM control signal + tachometer. Precise speed regulation independent of supply voltage.

4-conductor interface
Thermal Algorithm

Staged Cooling Logic

Configurable temperature thresholds trigger sequential fan activation — power conservation, reduced noise, and extended MTBF through intelligent staging.

StageActivation BarFans ActiveTrigger
S1
Fan 1 ON
1/4
T₁ threshold crossed
S2
Fans 1–2 ON
2/4
T₂ threshold crossed
S3
Fans 1–3 ON
3/4
T₃ threshold crossed
S4
All 4 Fans ON
4/4
T₄ threshold crossed
Deactivation occurs in reverse order (Fan 4 → Fan 1) as temperature decreases below thresholds. All thresholds are field-configurable via RS232.
Technical Documentation

System Infographics

PRISM 4xFAN Controller system infographic
Enclosure Options

Engineered Housings

Available in transparent and solid black configurations

Transparent Enclosure
Transparent Enclosure
Full internal visibility for diagnostics and monitoring
Solid Black Enclosure
Solid Black Enclosure
Industrial-grade hardened housing for harsh environments
Full Specifications

Technical Data Sheet

PRISM 4xFAN Controller — Technical Specifications
Fan Channels4 × Independent DC Fan Outputs
Fan Compatibility2-wire / 3-wire PWM / 4-wire PWM
Temperature Probes2 × Digital (Internal + External)
Serial InterfaceRS232
Override Inputs2 × Dry-Contact Hardwire
Emergency ShutdownExternal input (LVD compatible)
Alarm Output1 × Physical output (SCADA/monitoring)
Enclosure OptionsTransparent / Solid Black
Deployment Environments

Applications

Telecom Base Stations

Outdoor and remote enclosures demanding reliable thermal regulation in harsh environments.

Industrial Control Cabinets

Automation racks and PLC enclosures requiring precision thermal stability for continuous operations.

Battery Backup Systems

UPS installations where preserving battery life and preventing thermal runaway is mission-critical.

Edge Computing Sites

Remote compute nodes that demand precise thermal stability without on-site intervention.

Deploy PRISM Thermal Intelligence

The Invisible Guardians of
Your Infrastructure

Four-channel precision thermal control engineered for the environments that never sleep. Contact our team to specify the right solution for your deployment.