Danfoss VLT FC 102 Series Design Manual page 23

Introduction to VLT® HVAC D...
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Hazardous Non Hazardous Area
Area
PTC Thermistor Card
X44/ 1 2 3 4 5
Digital Input
PTC
e.g. Par 5-15
Sensor
12 13 18
Par. 5- 19
Terminal 37 Safe Stop
Figure 2.7 Figure of the essential aspects for installing a
combination of a Safe Torque Off application and an
MCB 112 application. The diagram shows a Restart input for
the external Safety Device. This means that in this installation,
5-19 Terminal 37 Safe Stop might be set to value [7] PTC 1 &
Relay W or [8] [8] PTC 1 & Relay A/W. Refer to MCB 112
Instruction Manual for further details.
Parameter settings for external safety device in
combination with MCB112
If MCB 112 is connected, then additional selections ([4] PTC
1 Alarm to [9] PTC 1 & Relay W/A) become possible for
5-19 Terminal 37 Safe Stop. Selections [1] Safe Torque Off
Alarm and [3] Safe Torque Off Warning are still available but
are not to be used as these are for installations without
MCB 112 or any external safety devices. If [1] Safe Torque
Off Alarm or [3] Safe Torque Off Warning should be selected
by mistake and MCB 112 is triggered, then the adjustable
frequency drive reacts with an alarm "Dangerous Failure
[A72]" and coasts the adjustable frequency drive safely,
without Automatic Restart. Selections [4] PTC 1 Alarm and
[5] PTC 1 Warning are not to be selected when an external
safety device is used. These selections are for when only
MCB 112 uses the Safe Torque Off. If selection [4] PTC 1
Alarm or [5] PTC 1 Warning is selected by mistake and the
external safety device triggers Safe Torque Off, the
adjustable frequency drive issues an alarm "Dangerous
Failure [A72]" and coasts the adjustable frequency drive
safely, without Automatic Restart.
MG11BC22
Design Guide
MCB112
6 7 8 9 10 11 12
19 27 29 32 33 20 37
DI DI
Safe Stop
Safety Device
SIL 2
Safe AND Input
Safe Output
Manual Restart
Danfoss A/S © Rev. 06/2014 All rights reserved.
Selections [6] PTC 1 & Relay A to [9] PTC 1 & Relay W/A must
be selected for the combination of external safety device
and MCB 112.
NOTICE!
Note that selections [7] PTC 1 & Relay W and [8] PTC 1 &
Relay A/W open up for automatic restart when the
external safety device is de-activated again.
This is only allowed in the following cases:
•
The unintended restart prevention is
implemented by other parts of the Safe Torque
Off installation.
•
A presence in the dangerous zone can be
physically excluded when Safe Torque Off is not
activated. In particular, paragraph 5.3.2.5 of ISO
12100-2 2003 must be observed.
See MCB 112 Instruction Manual for further information.
2.6.3 Safe Torque Off Commissioning Test
After installation and before first operation, perform a
commissioning test of an installation or application making
use of Safe Torque Off.
Moreover, perform the test after each modification of the
installation or application which the Safe Torque Off is part
of.
NOTICE!
A passed commissioning test is mandatory after first
installation and after each change to the safety instal-
lation.
The commissioning test (select one of cases 1 or 2 as
applicable):
Case 1: Restart prevention for Safe Torque Off is
required (i.e., Safe Torque Off only where 5-19 Terminal
37 Safe Stop is set to default value [1], or combined Safe
Torque Off and MCB112 where 5-19 Terminal 37 Safe
Stop is set to [6] or [9]):
1.1 Remove the 24 V DC voltage supply to
terminal 37 using the interrupt device while the
motor is driven by the FC 102 (i.e., the line power
supply is not interrupted). The test step is passed
if the motor reacts with a coast and the
mechanical brake (if connected) is activated, and
if an LCP is mounted, the alarm "Safe Torque Off
[A68]" is displayed.
2 2
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