Danfoss MCO 351, Technical Data Manual, Page: 10 / 49

There are 2 digital input/output terminal blocks, 10 inputs and 8 outputs. (See figure below)
Terminal X57
Terminal Number Descriptive Name
Digital Inputs
1 Digital Input
2 Digital Input
3 Digital Input
4 Digital Input
5 Digital Input
6 Digital Input
7 Digital Input
8 Digital Input
9 Digital Input
10 Digital Input
Terminal X59
Terminal Number Descriptive Name
Digital Output
1 Digital Output
2 Digital Output
3 Digital Output
4 Digital Output
5 Digital Output
6 Digital Output
7 Digital Output
8 Digital Output
Terminal X59
Terminal Number Descriptive Name
24 V Supply
1 + 24 V Supply
2 GND
2.2.3. Encoder Monitor
Both encoder interfaces are equipped with a monitoring 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. An encoder fault will result in an ”Option error” 192
if encoder monitoring is activated via parameter 3239 (master) and 3209 (slave).
2. Introduction MCO351 Positioning Controller
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MG.33.R1.02 - VLT ® is a registered Danfoss trademark
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