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.
Internal Product Review
The EM-D-30 amplifier board from Vickers delivers reliable performance with a frequency response up to 6 kHz and a maximum output current of 600 mA for demanding control applications. The opto-coupled alarm output provides secure fault signaling while maintaining electrical isolation. This board is a strong choice for precision amplifier needs where stability and accurate signal handling are critical.
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Product Description:
The EM-D-30 is an analog amplifier board manufactured by Vickers for the Vickers Amplifier Boards series. It fits into modular control racks, where it scales command voltages and produces regulated drive currents for proportional actuators used throughout industrial automation cells. Integrated fault detection lets the board alert the host controller when limits are exceeded, allowing process equipment to react quickly to abnormal operating conditions.
The printed circuit measures 127.0 mm in length, providing a clear dimensional reference when arranging card cages. Its small-signal path maintains a bandwidth of up to 6 kHz at -3 dB, supporting rapid valve or servo responses. The command input tolerates an absolute maximum of 10 V DC, making it compatible with common PLC analog outputs. The power stage can deliver up to 600 mA with a 20 Ω load. Its output current changes by only ±0.001 mA/V as the supply voltage varies, helping coil force remain steady during bus fluctuations. Alarm information is transmitted through an optically coupled output that maintains galvanic isolation from noisy field wiring. The preamplifier provides a buffered signal for the downstream current driver while protecting the control interface from excessive loading.
Power-stage output changes by no more than ±0.4 mA/°C, helping maintain stable actuator bias as enclosure temperature changes. The preamplifier uses a constant-current feed of 2 mA to minimize loading on sensitive command circuits. Over a 24-hour period, the voltage amplifier shifts by only ±0.005 V DC. Its warm-up deviation at the null point is limited to ±0.1 mA. The voltage amplifier can drive 5 mA and provides a 6 V DC output level. Its supply coefficient is ±0.0001 V/V, while its temperature coefficient is ±0.0002 V/V. These values indicate how closely the board maintains its zero and span after initial stabilization. A warm-up drift of ±0.004 V DC describes the remaining transient change as the board reaches a stable operating temperature.
