Eurotherm Drives 590 DRV Digital, Product Manual, Page: 94 / 318

App. A - 9
590 DRV Digital DC Drive Product Manual
A
Appendix A Technical Description
This terminal provides a l24 VDC signal for the DRIVE HEALTHY condition signal. DRIVE HEALTHY is
TRUE whenever there are no software or hardware alarms present. It is reset when the RUN signal is removed from
C3.
B7/Digital Output 3
This terminal provides a +24 VDC signal for the DRIVE READY message. DRIVE READY is TRUE whenever
there are no software or hardware alarms present.
B8/Program Stop
This terminal is for a controlled ramp stop input. When the PROGRAM STOP input is held at +24 VDC, the drive
operates as configured; when it is at zero volts or is an open circuit, the controller causes a controlled (or program)
stop as defined in the SETUP PARAMETERS::STOP RATES parameters.
NOTE. Non-regenerative drives cannot perform program stops; they will instead coast to a stop.
B9/Coast Stop
This terminal is for uncontrolled stop input. When the COAST STOP input is at +24 VDC, the drive operates nor-
mally. When it is at zero volts or is an open circuit, the main contactor is open, the drive is not enabled (see descrip-
tion for terminal C5), and the motor coasts to a stop.
C1/0v (Power Common)
This terminal is the control and relay common. It is not connected to ground.
C2/Thermistor
This terminal is for motor over-temperature protection input. DC motors should be protected against sustained
thermal overloads by fitting temperature-sensitive resistors or switches. Sensors should be connected in series
between terminals C1 and C2. If the optional blower motor starter is installed, the auxillary contact should also be
connected in series with the sensors. Terminals C1 and C2 must be linked if over-temperature sensors are not used.
C3/Start/Run
This terminal is for the START/RUN input. When a +24 VDC input is applied to this terminal, the controller will
operate as long as there are no alarms, the PROGRAM STOP and COAST STOP signals are true (at +24 VDC), and
the controller is enabled. When the input is removed, The drive stops in the time set by STOP TIME in SETUP
PARAMETERS::STOP RATES.
C4/Jog
This terminal is for JOG/SLACK SPEED CONTROL. When a +24 VDC signal is at this terminal and a 0 VDC signal
is at terminal C3, the drive jogs. When the +24 VDC is removed, the drive ramps to zero speed.
C5/Enable
This terminal inhibits controller operation electronically. If the enable input is at zero volts or open circuited, all
control loops will be inhibited and the controller will not generate current. When switching power to the motor using
a DC contactor, connect this terminal through an auxiliary, normally-opened contact on the contactor to C9 (+24
VDC). This terminal is internally connected to the auxiliary contact of the DC contactor on DRV models.
C6/Digital Input 1
This terminal selects the CURRENT CLAMP MODE. At zero volts, it sets ANALOG INPUT 5 (terminal A6) to be
the main unipolar current limit. When ON (at +24 VDC), ANALOG INPUT 5 is the POSITIVE CURRENT CLAMP
and ANALOG INPUT 4 is the NEGATIVE CURRENT CLAMP.
C7/Digital Input 2
This terminal is for the RAMP HOLD signal. If the input is held ON (+24 VDC), the RAMP GENERATOR OUT-
PUT is frozen at the last value regardless of the ramped setpoint input. When OFF (0 VDC), the ramp output follows