Danfoss VLT Midi Drive FC 280 Instruction Manual

130BE424.10
FC 280
37
38
12
55
1
1 Safety device
Figure 6.4 STO Wiring in 1 Cabinet, Adjustable Frequency
Drive Provides the Supply Voltage
130BE425.11
FC 280
24 V source
37
38
+
-
12
55
1
1 Safety device
Figure 6.5 STO Wiring, External Supply
3. Complete the wiring according to the instructions
in chapter 4 Electrical Installation, and:
•
Eliminate short circuit risks.
•
Ensure that the STO cables are shielded
if they are longer than 20 m (65 ft).
•
Connect the safety device directly to
terminals 37 and 38.
6.3
STO Commissioning
6.3.1 Activation of Safe Torque O
To activate the STO function, remove the voltage at
terminals 37 and 38 of the adjustable frequency drive.
When STO is activated, the adjustable frequency drive
issues alarm 68, Safe Stop or warning 68, Safe Stop, trips the
unit and coasts the motor to stop. Use the STO function to
stop the adjustable frequency drive in emergency stop
situations. In normal operating mode when STO is not
required, use the standard stop function instead.
NOTICE!
If STO is activated while the adjustable frequency drive
issues warning 8 or alarm 8 (DC undervoltage), the
adjustable frequency drive skips the alarm 68, Safe Stop,
but the STO operation is not aected.
6.3.2 Deactivation of Safe Torque O
Follow the instructions in Table 6.2 to deactivate the STO
function and resume normal operation based on the
restart mode of the STO function.
WARNING
RISK OF INJURY OR DEATH
Reapplying 24 V DC supply to either terminal 37 or 38
terminates the SIL2 STO state, potentially starting the
motor. Unexpected motor start may cause personal
injuries or death.
•
Ensure that all safety measures are taken before
reapplying 24 V DC supply to terminals 37 and
38.
Restart
mode
Steps to deactivate STO
and resume normal
operation
Restart mode congu-
ration
Manual
restart
1. Reapply 24 V DC
supply to terminals 37
and 38.
2. Initiate a reset signal
(via serial communi-
cation bus, digital I/O
or [Reset]/[O Reset]
key on the LCP).
Default setting.
Parameter 5-19 Terminal
37/38 SAFE STOP=[1] Safe
Stop Alarm
Automatic
restart
Reapply 24 V DC supply
to terminals 37 and 38.
Parameter 5-19 Terminal
37/38 SAFE STOP= [3] Safe
Stop Warning.
Table 6.2 STO Deactivation
Safe Torque O (STO)
VLT
®
Midi Drive FC 280
34 Danfoss A/S © 11/2015 All rights reserved. MG07A122
6
6

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English