6 of 9
REF: CCU/IO-485.DOC REV: C June 20, 2000
Configuration of CCU/IO:
•
You must use the jumpers JP31 (1 to 8) on the CCU/IO to configure the local CCU Node address.
Each CCU Node is numbered sequentially from Address 1. Boards connected to Channel A on the
CCU/485-IO must have addresses from 1 to 8 inclusive. Boards connected to Channel B on the
CCU/485-IO must have addresses from 9 to 16 inclusive. For example if 12 CCU/IO-485s are
connected to a CCU485/IO ( 8 connected on Channel A and 4 on Channel B ), then the 8 CCU/IO-
485s on Channel A will be given the Addresses 1 to 8. The 4 CCU/IO-485s on Channel B will be
given the Addresses 9 to 12. Address 0 CANNOT BE USED. If a CCU/IO-485 is connected to a
CCU/232-IO, CCU/422-IO or CCU/FIBRE-IO, then the CCU/IO-485 must be given an address
of 1. The jumpers are arranged so that they represent the address in the BINARY number system.
Example:
Addr
8
7
6
5
4
3
2
1
1
SHORT
2
SHORT
3
SHORT
SHORT
4
SHORT
5
SHORT
SHORT
6
SHORT
SHORT
7
SHORT
SHORT
SHORT
8
SHORT
9
SHORT
SHORT
10
SHORT
SHORT
11
SHORT
SHORT
SHORT
12
SHORT
SHORT
13
SHORT
SHORT
SHORT
14
SHORT
SHORT
SHORT
15
SHORT
SHORT
SHORT
SHORT
16
SHORT
You will notice that 6,7 and 8 should never be shorted.
