PR electronics 2224 Valve Controller (2224_2B)

PR electronics 2224 Valve Controller (2224_2B) – Dual-Channel Proportional Valve Driver

The PR electronics 2224 Valve Controller (Model: 2224_2B) is a signal conditioner engineered to regulate single- and dual-coil hydraulic and pneumatic proportional valves. Built in an 11-pole plug-in housing, the 2224_2B features a 24V DC nominal power supply and factory hardware/firmware routing configured for dual-valve (A/B) operation.

This controller provides precise current modulation through Pulse-Width Modulation (PWM) with selectable chopper frequencies (8 to 400 Hz). It eliminates static friction and mechanical hysteresis on proportional spools while protecting internal coil winding through closed-loop mean current monitoring and peak-current cutoff. Whether interfacing with dual proportional solenoid coils on deck machinery or controlling main engine variable governor actuators, the PR 2224 delivers repeatable flow profiles with zero drift.

Model Details

• Brand: PR electronics
• Series: System 2200 Signal Conditioning & Valve Amplifiers
• Manufacturer Part Number (MPN): 2224-2B (Alternative notation: 2224_2B)
• Architecture Configuration:
  • 2224: Microprocessor proportional valve controller base series
  • -2: Power Supply: 24 VDC (operational window 19.2 to 28.8 VDC)
  • -B: Dual Valve (A/B) Channel Output Configuration

Technical Datasheet

Features

1. Dual-Coil PWM Control: Drives two independent proportional coils (Valve A and Valve B) with programmable chopper modulation (8–400 Hz) to eliminate spool deadband and stick-slip friction.
2. Universal Input Versatility: Accepts standard industrial/marine process loops (0/4–20 mA, 0/2–10 VDC, 0/0.2–1 VDC) as well as direct bi-directional joystick potentiometers (±10 V / 1 kΩ to 10 kΩ).
3. Independent Dynamic Tuning: Fully programmable digital ramp times (0.0 to 10.0 seconds acceleration/deceleration), step/jump breakaway current values, deadband compensation (0–99.9%), and signal reversal via front keypad.
4. Robust Output Stage: Delivers continuous mean output current up to 3000 mA (3.0 A) per channel with built-in hardware overcurrent suppression tripping at 7 A peak.
5. Rugged 11-Pole Relay Form Factor: Compatible with standard 11-pole octal/relay bases (PR 7023 DIN-rail socket), allowing sub-minute field swapouts without disturbing cabinet control harness terminations.

Direct Hardware Cross-References (PR electronics System 2200)

• PR 2224-1A: Single-channel driver, 12 VDC supply
• PR 2224-1B: Dual-channel driver, 12 VDC supply
• PR 2224-2A: Single-channel driver, 24 VDC supply
• PR 2224-2B: Dual-channel driver, 24 VDC supply (Exact Unit)
• Mounting Bases & Accessories: PR 7023 (11-Pole DIN Rail / Surface Socket), PR 7002 (Stainless Steel Retaining Wire/Clip), PR 7024 (Keying Coding Ring & Pin).

Valve Coil & Proportional Solenoid Compatibility

• Bosch Rexroth: 4WRA6, 4WRA10, 4WRE6, 4WRE10 series proportional directional valves.
• Danfoss / Eaton Vickers: KDG4V-3, KDG4V-5, KBG4V, and proportional relief valves (KCG series).
• Parker Hannifin: D1FB, D3FB, D1FC series proportional directional control valves.
• Moog: Proportional throttle and spool directional valves without integral electronics (OBE).
• Atos: DHZO, DKZOR, and DPZO proportional directional valves.

Frequently Asked Questions

What is the difference between PR electronics 2224-2A and 2224-2B?

The 2224-2A is engineered to drive single-coil proportional valves (one directional output), whereas the 2224-2B features dual output stages designed to control double-coil (A and B) proportional valves or two independent single-acting valves from a single joystick or process loop.

Can the PR 2224-2B operate on a 12V DC power supply?

No. The 2224-2B is designed for nominal 24V DC systems (19.2 to 28.8 VDC operating range). For 12V DC systems (common on small pleasure craft or mobile plant battery banks), select model 2224-1B.

What happens if the valve coil short-circuits?

The PR 2224 features an integrated overcurrent detection circuit. If instantaneous peak current exceeds 7 A, the output driver automatically trips and disables output current to protect the module’s power semiconductors.

How do I switch between Valve A and Valve B when controlling a double-coil setup?

The controller supports two switching modes: Function 1 uses a digital PNP signal on terminal 2 (applying +24 V selects Valve A, while open selects Valve B). Function 2 automatically switches between coils based on the analog input signal relative to the midpoint (e.g., using a center-zero bi-directional joystick).

What base socket is required to install the PR 2224-2B?

The unit plugs into a standard industrial 11-pole socket. The manufacturer-recommended mounting base is the PR electronics 7023 socket, which mounts directly to 35 mm DIN rails (EN 50022) or bulkhead plates.