Application Examples; Setting Up The Option For Standard Use - Danfoss VLT PTC Thermistor Card MCB 112 Operating Manual

VLT® PTC Thermistor Card MCB 112
Operating Guide

5 Application Examples

5.1 Setting up the Option for Standard Use

Hazardous Non-hazardous area
area
PTC Thermistor Card
MCB 112
X44/ 1 2 3 4 5 6 7 8 9 10 11 12
Digital input
PTC
e.g. Par 5-15
sensor
12 13 18 19 27 29 32 33 20 37
Illustration 9: Standard use of VLT
Table 3: Programming Example 1
Option number Option name
Parameter 5-19 Terminal 37 Safe Stop
[4] PTC 1 alarm
Parameter 5-15 Terminal 33 Digital Input
[80] PTC card 1
Alternatively, Parameter 5-19 Terminal 37 Safe Stop could be set to [5] PTC 1 Warning, which means an automatic restart when the
conditions of the PTC circuit have returned to acceptable. The selection depends on customer demands.
24 | Danfoss A/S © 2022.08
Par. 5-19
Terminal 37 Safe Stop
DI DI
Safe Torque Off
PTC Thermistor Card MCB 112
®
Description
If the motor temeprature is too high or if a PTC failure occurs, the MCB 112 activates the STO.
Terminal 37 goes low (active), and digital input 33 goes high (active). This parameter decides
the consequence of the Safe Torque Off (STO). With this selection, the drives coasts and the
LCP shows alarm 71, PTC 1 safe stop. Reset the drive manually from the LCP, digital input, or
fieldbus when the conditions of the PTC are acceptable again (motor temperature has drop-
ped).
Connects the digital input of terminal 33 in the drive to the MCB 112, which enables the MCB
112 to indicate when the STO has been activated from here.
Application Examples
AQ267038105120en-000101 / 130R0104