Hitachi Relion 670 Series Applications Manual page 273

1MRK506375-UEN Rev. N
The Gray code conversion above is not complete and therefore the conversion from decimal
numbers to Gray code is given below.
Table 31:
IEC06000523 V1 EN-US
Via a mA input signal
Any of the six inputs on the mA card (MIM) can be used for the purpose of tap changer position
reading connected to the Tap changer control and supervision, 6 binary inputs TCMYLTC or 32
binary inputs TCLYLTC.
The measurement of the tap changer position via MIM module is based on the principle that the
specified mA input signal range (usually 4-20 mA) is divided into N intervals corresponding to the
Railway application RER670
Application manual
Gray code conversion
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Section 12
Control
SEMOD159170-35 v5
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