Innotech Genesis V4 System - Manual (Page 31)

Installation Instructions for Innotech Genesis Systems
Edition 011100 3-5
3-3.1.1. Power Input. The Genesis II Digital Controller power requirements are:
•
24Vac
±
10%, 50/60Hz at 1.0A, or
•
24Vdc
±
10%, at 0.75A (Factory Modification is Required)
For 24Vac supply voltages, a safety transformer with a nominal rating of 30VA must be
used for the Digital Controller. The transformer must be in compliance with EN60742,
designed for 100% duty and fused in compliance with local safety regulations. A single
transformer may be used to supply voltage to more than one unit (such as a Digital
Controller and associated expansion modules) providing the planned load is well within the
transformer’s rating.
The transformer output terminal designated as AC Neutral must be solidly earthed to the
enclosure’s main earth link.
Power input terminals are Terminals 1 and 2 and connected as follows:
Terminal AC Supply DC Supply
1 24Vac +24Vdc
2 0Vac
(Neutral)
-24Vdc
Note: Resistance between Terminal 2 and
earth must be 3 Ohms, or less
3-3.1.2. Digital Inputs. The Genesis II Digital Controller’s eight digital input
channels (Terminals 3–18) 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. Signal power requirements are:
•
24Vac
±
15%, or
•
24Vdc
±
15% (Factory Modification Required)
There are two terminals associated with each digital input channel. If an external DC signal
source is used, the odd-numbered (left) terminal must be wired as positive and the even-
numbered (right) terminal as negative.
Refer to Table 3-2 for digital input terminal number assignments. Signal names assigned to
the terminals are DI1+/
−
through DI8+/
−
. DI stands for Digital Input, the numeral
represents the channel number and the + or
−
indicates the signal polarity when using a DC
signal power source.