Product Description:

The EEA-PAM-513-D-33 is a plug-in power amplifier card engineered by Vickers for electro-hydraulic motion control and is part of the EEA-PAM Power Amplifiers series. Designed for industrial automation, the unit modulates the current sent to a proportional valve solenoid so that spool position follows an external command signal. It installs on a standard backplane inside a control rack, which supports centralized wiring and avoids field soldering during installation.

Electrical interfacing is through a DIN 41612 F48 male connector that carries command, feedback, and supply lines in a keyed format that helps prevent misalignment. The card draws from a 24 V DC, 50 W supply, and this low-voltage feed powers the internal regulators and the output stage that drives the valve coil. Analog voltage commands encounter an input impedance of 47 kΩ, which limits loading on upstream PLC outputs, while the solenoid channel can deliver up to 1.6 A for medium-size proportional valves. Alarm circuitry uses a pull-up resistance of 50 Ω, allowing the control system to detect open-circuit or overcurrent conditions. Protection against wiring errors is provided by reverse-polarity circuitry that blocks current if the supply leads are accidentally swapped.

Additional reference outputs provide fixed levels for signal setup and circuit checks. The positive monitor point supplies +10 V at 5 mA, and a complementary rail furnishes −10 V at 5 mA. These outputs can be used to verify external command sources and confirm signal continuity without adding a separate reference module. When the PID enable line is active, the board sinks no more than ≤10 mA, so standard digital I/O points can switch the control loop directly. This arrangement supports closed-loop pressure or flow regulation while keeping the rack interface straightforward.