Innotech Genesis II Digital Controller (v5) - Manual (Page 46)

Genesis II Installation Instructions
Page 46 © Mass Electronics Pty Ltd 2010 Edition 2.0 dated 06/12/2013
3-3.2.3 Digital Outputs
Each of the MPCII Mid Points Controller’s eight digital output channels consists of a single-pole,
double-throw (SPDT) relay. The two terminals assigned to each channel represent the associated
relay’s Normally Open (NO) and Common (COM) contacts.
Digital output relay contacts are rated at 24VAC, 2A (to be supplied by a Class 2 Transformer).
Good practice is to use pilot relays for the actual switching functions, particularly when it applies to
inductive loads such as coils, solenoids and motors. This protects the relays of the Digital Output
channel and has the advantage of allowing the pilot relays to be installed adjacent to the controlling
switch-gear.
The MPCII Mid Points Controller's Digital Output terminals are not assigned numbers; however, each
Digital Output terminal is clearly labelled as to its polarity and signal name. Signal names assigned to
the terminals are DO 1(NO/COM) through DO 8(NO/COM).
Refer to Table 3-10 for Digital Output terminal number assignments:
Normally Open (NO) Common (COM)
Terminal Signal Terminal Signal
DO 1 DO 1 NO DO 1 DO 1 COM
DO 2 DO 2 NO DO 2 DO 2 COM
DO 3 DO 3 NO DO 3 DO 3 COM
DO 4 DO 4 NO DO 4 DO 4 COM
DO 5 DO 5 NO DO 5 DO 5 COM
DO 6 DO 6 NO DO 6 DO 6 COM
DO 7 DO 7 NO DO 7 DO 7 COM
DO 8 DO 8 NO DO 8 DO 8 COM
Table 3-10: MPCII Mid Points Controller Digital Output Signal Conditions