Ecb Safety Interlock; Ecb Common Run/Stop - Danfoss VLT Option Panel Instruction Manual

ECB Safety Interlock

General Information
The safety interlock feature prevents the drive
or bypass from operating. Only a fire mode
command to run overrides this function. For
operation in drive or bypass mode, the safety
external interlock input contact must be
closed. External inputs include, but are not
limited to, high and low pressure limit
switches, fire alarm, smoke alarm, high and
low temperature switches, and vibration
sensors.
Operation
When an external safety input closes on ECB
terminals 1 and 2 on connector X57, the
option panel is in operational mode. When
open, power to the motor is disabled. The
bypass ignores all run commands except for
fire mode operation, when applicable. The
drive display indicates alarm 221, bypass
interlock, meaning the problem is external to
the drive. A factory installed jumper between
X57 terminals 1 and 2 allows the unit to
operate when no safety input is connected.
This jumper must be removed when connect-
ing in a safety interlock circuit.
Safety Interlock Function Setup
• Remove factory-installed jumper
between ECB connector X57 termi-
nals 1 and 2 on drive control terminals.
• Wire safety input to connector X57
terminals 1 and 2.
• For technicians familiar with connect-
ing to drive terminals 12 and 27 for
safety interlock, be aware that ECB
bypass operation will NOT stop with
the external fault report. Use terminals
1 and 2 on connector X57, as indi-
cated, for bypass control.

ECB Common Run/Stop

General Information
The common run/stop function provides
remote run and stop control of the motor(s)
while in either drive or bypass. Without
common run/stop, the motor would automati-
cally run at full speed whenever the bypass is
activated. The remote signal provides drive
control as well as bypass control, making this
one input common to both. Common run/stop
is enabled by factory default. When used with
the run permissive function, common run/stop
permits run request operation in bypass.
Operation
A user supplied remote run command wired
to drive terminals 13 and 18 initiates remote
drive or bypass operation. Common run/stop
can also be activated by hand on the drive
keypad or through serial communication.
Operation in either drive or bypass is deter-
mined by drive or bypass mode selection, not
the run/stop command.
Prior to Enabling Common Run/Stop
• Complete the start-up procedure to
verify motor rotation direction in
bypass is correct and that the system
is ready in all respects for continuous
full speed operation in bypass.
Common Run/Stop Setup
• Wire a remote run/stop to drive input
terminals 13 and 18 (default run input).
Ensure that parameter 18 is pro-
grammed for run (default setting).
47