Innotech Genesis II Digital Controller (v5) User Manual
Page 45
Page 45
Genesis II Installation Instructions
© Mass Electronics Pty Ltd 2010
Chapter 3 – Electrical Installation
3-3.2.2 Digital Inputs
The MPCII Mid Points Controller’s four Digital Input channels (Terminals 4 to 11) provide the capability
of directly interfacing to digital input signal sources such as pushbutton switches and relay contacts.
Because each Digital Input channel is isolated, the power source for the signal must be external to the
controller. This signal source can be AC or DC. If the source is AC, it can be provided by the auxiliary
transformer.
Digital input signal power requirements are one of the following:
• 24 VAC ±15%
• 12 VDC ±15%
There are two terminals associated with each Digital Input channel. If an external DC signal source
is used, the even-numbered (left) terminal must be wired as positive and the odd-numbered (right)
terminal as negative.
The MPCII Mid Points Controller's Digital Input terminals are not assigned numbers; however, each
Digital Input terminal is clearly labelled as to its polarity and signal name. Signal names assigned to
the terminals are DI 1+/- through DI 4+/-.
Refer to Table 3-9 for the MPCII Mid Points Controller's Digital Input Signal Conditions:
Positive Side
Negative Side
Terminal
Signal
Terminal
Signal
DI 1
DI 1+
DI 1
DI 1-
DI 2
DI 2+
DI 2
DI 2-
DI 3
DI 3+
DI 3
DI 3-
DI 4
DI 4+
DI 4
DI 4-
Table 3-9:
MPCII Mid Points Controller Digital Input Signal Conditions