590 Series DC Digital Drive Installing the Drive
3-23
Control Connections continued
RS485 Link
H1
H2
H3
H4
H5
H6
User
connection to
external
equipment.
Fit the COMMS
Option Board
to the Drive.
This provides
terminals H1
to H6.
These terminals are found on the plug-in COMMS Option Board. The board,
when fitted to each unit, allows converters to be linked together to form a
network.
Refer to the RS485 Communications Interface Technical Manual supplied
with the option board.
Analog Tachogenerator
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 Chapter 13: “Standard and Optional Equipment” - Optional
Equipment for further information.
An Analog Tachogenerator 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
tachogenerator. The screen is grounded or earthed only at the drive end, any
other grounding arrangement may cause problems.
Terminals G1 and G2 are for AC tacho connections.
Terminals G3 and 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 ac
feedback to the speed loop. Consequently, the controller can only be
used with a positive setpoint.
Refer to Chapter 4: “Operating the Converter” for set-up information.
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