EM-D-30 Vickers
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The Vickers EM-D-30 is an amplifier board from the Vickers Amplifier Boards series. It features an opto-coupled alarm output type and a board length of 127.0 mm. The board delivers a power stage maximum output current of 600 mA with a 20 ohm load and has a frequency response up to 6 kHz at maximum gain.
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Product Description:
The EM-D-30 is an amplifier board manufactured by Vickers for the Vickers Amplifier Boards series. Installed between a motion controller and a proportional valve, it converts low-level reference voltages into stable coil current so hydraulic actuators follow setpoints accurately in industrial automation. The 127.0 mm card length fits standard eurocard racks, streamlining cabinet layouts for multi-axis machines.
At the input stage the board tolerates a ceiling of 10 V DC, allowing direct connection to typical ±10 V controllers. Under maximum gain the small-signal frequency response reaches 6 kHz, so valve spools can track rapid command changes without phase lag. The discrete power section can deliver 600 mA into a 20 Ω load, fully energizing most proportional solenoids, and its temperature coefficient is ±0.4 mA/°C, limiting drift during normal cabinet temperature swings. Additional characteristics include a supply sensitivity of ±0.001 mA/V, plus an opto-coupled alarm output that provides galvanic isolation to the supervising PLC.
The signal chain is completed by a pre-amplifier that furnishes 2 mA at 10 V DC, feeding the precision voltage amplifier. That stage can source 5 mA at 6 V DC and holds long-term accuracy with a drift of ±0.005 V DC over 24 hours. Line-voltage variations introduce only ±0.0001 V/V of error, while thermal influence is contained to ±0.0002 V/V. During warm-up the offset shifts by ±0.004 V DC and settles to a null uncertainty of ±0.1 mA, ensuring repeatable centering for closed-loop hydraulic positioning.
Same-day shipping is available for qualifying orders. Wake Industrial supplies a 1-year warranty on each unit. Quotations remain valid for 30 days, giving maintenance teams predictable budgeting.
Frequently Asked Questions about EM-D-30:
Q: What type of alarm output does the EM-D-30 amplifier board feature?
A: The EM-D-30 amplifier board provides an opto-coupled alarm output for signal isolation.
Q: What is the maximum frequency response of the EM-D-30 at -3 dB?
A: The frequency response of the EM-D-30 at maximum gain (-3 dB) is 6 kHz.
Q: What is the maximum input voltage accepted by the EM-D-30 board?
A: The EM-D-30 amplifier board allows for an input voltage up to 10 V DC.
Q: What is the maximum output current for the EM-D-30's power stage?
A: The power stage of the EM-D-30 can deliver up to 600 mA with a 20 Ω load.
Q: What is the pre-amp output voltage provided by the EM-D-30 amplifier board?
A: The pre-amp stage outputs a maximum of 10 V DC on the EM-D-30 board.
