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3-16
Installing the Converter
590+ Series DC Digital Converter
Control Connections cont.
Program Stop/Coast Stop
B8
B9
C9
Connect
terminals B8
and B9 to C9
via an
Emergency
Stop relay.
These connections provide a Program Stop (B8), and a Coast Stop (B9).
Refer to Chapter 4: "Starting and Stopping Methods".
The "Emergency Stop" relay (normally-open, delay on de-energisation) should not be
part of the normal sequencing system which is implemented via the Start contacts, but is
a relay which can be operated in exceptional circumstances where human safety is of
paramount importance.
x
Removing 24V from B9 opens the main contactor via the relay
x
Removing 24V from B8 provides regenerative braking for 4 Quadrant 590+ drives
A regenerative drive can be stopped using a
Normal Stop
, a
Program Stop,
or an
Emergency Stop.
However, a non-regenerative drive can only be made to stop faster
than friction and loading will allow by Dynamic Braking.
Enable
C5
C9
Connect
terminal C5 to
C9.
Terminal C5 (Enable) must be connected to C9 (+24V) to allow the drive to run.
IMPORTANT:
Connection via a switch is useful to inhibit the drive without
opening the main contactor, however, it is not a safe mode of
operation as the drive dc output is only reduced to zero. If the
equipment controlled by the drive is to be serviced, then this
method should be avoided and the drive disabled and isolated.
Start/Run
C3
C9
Connect
terminal C3 to
C9 via a
switch.
When the single contact between C3 and C9 is closed the drive will run provided that:
x
B8 & B9 are TRUE (+24V) - see "Emergency Stop" above
x
C5 is TRUE (+24V) - see "Enable" above
When the single contact between C3 and C9 is opened the drive will decelerate the
motor to zero speed at a rate determined by the STOP TIME parameter’s value and the
MAIN CURR. LIMIT value. Refer to Chapter 6: “Application Programming” - STOP
RATES for further details.
Jog/Slack
C4
C9
Connect
terminal C4 to
C9 via a
switch or
pushbutton.
x
If the drive is stationary this switch provides a Jog facility.
x
If the drive is running, this switch provides a Take-Up Slack facility.
For other user-definable operating modes, refer to Chapter 6: "Programming Your
Application" - JOG/SLACK for further details.
External Trip
C1
C2
Connect
terminal C1 to
C2
or
link terminals
if not required
Terminals C1 and C2 must be linked if an External Trip interlock is not required.
This input terminal provides an external trip facility to any normally-closed trip switch ,
e.g. for vent fan overload protection.
E'
Stop
PROG
STOP
COAST
STOP
B8 B9 C9
Relay