Eurotherm Drives 590 DRV Digital, Product Manual, Page: 93 / 318

App. A - 8
A
Appendix A Technical Description
590 DRV Digital DC Drive Product Manual
TERMINAL DESCRIPTIONS
A1/0 VDC (Signal)
This terminal is the zero VDC reference for signals only, i.e., signals originating from terminal blocks A and B. It
must not be used as a return point for currents originating from terminal block C.
A2/Analog Input 1
This terminal is the speed setpoint.
A3/Analog Input 2
This terminal serves as either the AUXILIARY SPEED SETPOINT or CURRENT DEMAND, as determined by the
configuration of DIGITAL INPUT 3 at terminal C8. If C8 is an open circuit, the function is speed setpoint; if C8 is at
+24 VDC, the function is current demand. This input is hardwired and not software configurable.
A4/Analog Input 3
This terminal is the RAMPED SPEED SETPOINT.
A5/Analog Input 4
This terminal is the negative current clamp (see analog input 5, below).
A6/Analog Input 5
This terminal serves as either the MAIN CURRENT LIMIT or the POSITIVE CURRENT CLAMP, as determined by
the configuration of DIGITAL INPUT 1 on terminal C6. If C6 is an open circuit, ANALOG INPUT 5 is the MAIN
CURRENT LIMIT; if terminal C6 is at +24 VDC, ANALOG INPUT 5 is the POSITIVE CURRENT CLAMP and
ANALOG INPUT 4 is the NEGATIVE CURRENT CLAMP.
A7/Analog Output 1
This terminal is the SPEED FEEDBACK OUTPUT.
A8/Analog Output 2
This terminal is the TOTAL SPEED FEEDBACK.
A9/Current Meter Output
This terminal carries the BUFFERED ARMATURE CURRENT FEEDBACK, in either bipolar or unipolar form, as
set with the SETUP PARAMETERS, CALIBRATION, ARMATURE I (A9) parameter with the MMI. The default
output is ±10 VDC equals ±200%. This output is hardwired and not software configurable.
B1/0 VDC (Signal)
This terminal is the ZERO VOLT REFERENCE for an analog tachometer generator signal only.
B2/Analog Tachometer Generator Input
No connection. Do not use as a jumpering or connection point for external wiring.
B3/+10 VDC Reference
This terminal is for the positive reference supply.
B4/–10 VDC Reference
This terminal is for the negative reference supply.
B5/Digital Output 1
This terminal serves as the connection for ZERO SPEED detection, and pr24 VDC when at ZERO SPEED. It
can be modified with the MMI using the SETUP PARAMETERS, STANDSTILL, ZERO THRESHLD parameter.
B6/Digital Speed Output 2