3-28 Installing the Drive
DC590+ Series DC Digital Drive
Control Connections continued
Analog Tachometer
G1
G2
G3
G4
User
connection to
external
equipment.
Fit the Tacho
Calibration
Option Board
to the Drive.
This provides
terminals G1
to G4.
Refer to 45HOptional Equipment, page 46H3-53, for further information.
An Analog Tachometer is connected to the Drive using a screened twisted pair cable throughout its entire length to
provide speed feedback via the Tacho Calibration Option Board. This provides facility for an AC or DC tachometer.
The screen is grounded or earthed only at the drive end, any other grounding arrangement may cause problems.
• Terminals G1 & G2 are for AC tacho connections.
• Terminals G3 & G4 are for DC tacho connections.
NOTE The speed loop is set-up for an analog tacho by the SPEED FBK SELECT parameter in the
SPEED LOOP function block. Select ANALOG TACH for this parameter.
If an AC tachogenerator is used the output is rectified to produce the dc feedback to the speed loop.
Consequently, the controller can only be used with a positive setpoint.
Refer to Chapter 4: “Operating the Drive” for set-up information.
Microtach
F1
C1
C9
User
connection to
external
equipment.
Fit the
Microtach
Option Board
to the Drive.
This provides
the fibre optic
terminal F1.
Refer to 47HOptional Equipment, page 48H3-53, for further information.
The Parker SSD Drives MICROTACH is available in two versions:
z 5701 Plastic Fibre Microtach z 5901 Glass Fibre Microtach
A Microtach can be connected to provide speed feedback via the Microtach Option Board using the international
standard “ST” fibre optic system.
F1 is the fibre optic receiver input socket. Terminals C9 (+24V dc) and C1 (0V) are used to provide the supply and
return respectively.
NOTE The speed loop is set-up for the Microtach by the SPEED FBK SELECT parameter in the SPEED
LOOP function block. Select ENCODER for this parameter.
The maximum Microtach frequency is 50kHz, thus with a standard 1000 lines per revolution Microtach the motor
speed cannot exceed 3000 rpm.
For specification and connection information refer to Parker SSD Drives or the appropriate Technical Manual.
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