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Eaton Vickers EM-A-10 Service Data

Eaton Vickers EM-A-10 Service Data

Single ended linear dc servo amplifier
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®
Vickers
Service Data
Servo Valves
Single Ended Linear DC Servo Amplifier
EM-A-10
I-3081-S
Revised 09/01/87

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Summary of Contents for Eaton Vickers EM-A-10

  • Page 1 ® Vickers Service Data Servo Valves Single Ended Linear DC Servo Amplifier EM-A-10 I-3081-S Revised 09/01/87...
  • Page 2 General C. Installation The EM-A-10 servo amplifier is designed for mounting This manual is written primarily to establish a logical trouble- on a power supply plate such as the EMP-A-11. Input shooting procedure for the solid state EM (electronic modular) and output connections to the amplifier circuitry are amplifier.
  • Page 3 Power Supplies - Four regulated power supplies are Command and feedback signals are connected through R1 and provided on the plug-in module. Refer to the schematic R2 to the input of amplifier A1. Resistors R1, R2, and amplifier diagram figure 1. The amplifier section utilizes both a A1’s input resistance form a summing network which permits a positive ten (+10) and a negative ten (–10) volt supply for difference potential to be developed across amplifier A1’s input...
  • Page 4 5. Connect a volt-ohmmeter between TB2*-2 and TB2*-3 Note (common ground reference). Apply power and mea- The characteristics of this amplifier are such that once sure for negative .6 volts (200 MA). The voltage conduction starts, a very small change in input signal level should vary from approximately zero (0) volts at one will cause a very large change in output current.
  • Page 5 Figure 2. Pictorial Diagram of the EM-A-10 +10 Vdc DITHER *R20a R20 82K 3.3K 200K 3.3K Load 10/1 INV. 3 Ω *Factory Adjust Figure 3. Simplified Schematic Diagram of the EM-A-10...
  • Page 6 EMP-A-11 TB2-* Volt-Ohm Meter (VOM) Load Neg. Out Load Pos. Out Servo Coil 20Ω Common ground Input signal Test Potentiometer Remove signal wiring at terminals 4 & 5. Symbolize the wires removed to prevent error. 5000 Ohm Linear Potentiometer –DC Note If the EMP-A-11 power supply is not used, connect the power source as shown to...

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