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2-1
2. Wiring the Network and
Connecting the Computer
2.1 Introduction
For communication to be established between the personal computer running the CN8-
SW software and an Omega controller that supports Omega Plus Protocol (or the original
Omega Protocol), the computer and the controller must be connected to the same
network. (See 1.2 for hardware and software requirements for the personal computer.)
Communication between a single controller and the CN8-SW computer can be
established using an RS-232 interface. This requires:
· a n R S - 2 3 2 o p t i o n c a r d i n t h e c o n t r o l l e r
· a n a v a i l a b l e s e r i a l ( C O M ) p o r t o n t h e P C
· a n a d a p t e r t o m a k e t h e c o r r e c t p i n c o n n e c t i o n s f o r t h e t r a n s m i t , r e c e i v e ,
a n d s i g n a l g r o u n d a t t h e P C s e r i a l p o r t Õ s D - c o n n e c t o r .
Communication between the CN8-SW computer and multiple controllers can be
established using an RS-485 interface.
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This requires:
· a n R S - 4 8 5 o p t i o n c a r d i n t h e c o n t r o l l e r
· a n a v a i l a b l e R S - 4 8 5 p o r t o n t h e P C , o r a n a v a i l a b l e s e r i a l ( C O M ) p o r t a n d
a n R S - 2 3 2 - t o - R S - 4 8 5 a d a p t e r ( p / n 2 2 3 A 0 0 1 U 0 1 )
A T T E N T I O N : Al l wi r i n g sh o u l d b e do n e b y an ex p e r i e n c e d t e c h n i c i a n an d
b e i n s t a l l e d i n ac c o r d a n c e wi t h na t i o n a l a n d l o c a l el e c t r i c a l
c o d e s . T o av o i d s e r i o u s p e r s o n a l i n j u r y a n d d a m a g e t o
e q u i p m e n t , f o l l o w al l wa r n i n g s an d ca u t i o n s pr o v i d e d i n t h e
c o n t r o l l e r ma n u a l s .
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Up to 32 controllers can be included on an RS-485 network without using a network repeater device.
The CN8-SW software can address up to 254 controllers.