Programmable SyncPos motion controller
MG.10.J8.02 – VLT is a registered Danfoss trade mark
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Supply voltages:
The option card is supplied by the internal 24 V
DC supply of VLT 5000, but as the available power
is limited it can be necessary to use an external
24 V DC supply.
The 24 V DC supply of VLT 5000 can supply a total
of 420 mA including the load on the control card
(terminal 12, 13 and output 42 and 45).
The 5 V output on the option card is generated
from the 24 V supply. The maximum power on the
5 V side is 5 V * 280 mA = 1.4 W, this corresponds
to app. 60 mA on the 24 V side.
When an external 24 V DC voltage source is used
the internal 24 V supply from the control card must
be disconnected, this is done by opening
switch 1.1 and 1.2
Each digital input on the option card takes 8 mA.
Each digital output on the option card can supply
up to 0.7 A (external 24V-supply) depending on the
load.
The load from the 24 V supply (internal or external)
can be calculated as follows:
8 mA * number of digital inputs
+
Load on digital outputs
(mk3 C, O1 – O8)
+
load on 5 V supply
(mk3 B/D, 5 V/com)
+
Load on control card
(24 V supply, terminal 12/13 and
outputs, terminal 42/45)
Input/Output terminals
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Encoder monitor
Both encoder interfaces are equipped with a moni-
toring circuit that can detect open circuit as well
as short circuit of each encoder channel. Each
encoder channel has a LED showing the status:
Green light means ok, no light means fault. Zero
channel monitoring can be switched off by means
of switch 1.4, this is necessary when using incre-
mental encoders without Zero channel or absolute
encoders. Switch 1.4 disables monitoring of both
master and slave Zero channel. If disabling of only
one of the two Zero channels is required (e.g. when
using incremental master encoder and absolute
slave encoder) the unused Zero channel input
must be connected to 5V/common as shown
below.
Physical placing of the LED’s and the switches can
be seen in the chapter "Option card layout".
An encoder fault will only result in an ”Option error”
calling the error handler (ON ERROR) if encoder
monitoring is activated via parameter MENCODER
(master) and ENCODER (slave).
Note: Monitoring of the master encoder is disabled
when switch 1.3 is ”OFF”.
