The table below shows how the calls are allocated on the extension board #3
With 3
Extensions
Down Collecve Full Collecve
GND
Biasing voltage from periphery supply – negative side
EC0
Down 16 Car 16
EC
1 Down 17 Car 17
EC
2
Down 18 Car 18
EC
3 Down 19 Car 19
EC
4
Down 20 Car 20
EC
5 Down 21
Car 21
EC
6 Down 22 Up 16
EC
7 Down 23 Up 17
EC
8 Down 24 Up 18
EC
9 Down 25 Up 19
EC
10 Down 26 Up 20
EC
11 Down 27 Down 17
EC
12 Down 28 Down 18
EC
13 Down 29 Down 19
EC
14 Down 30 Down 20
EC
15 Down 31 Down 21
Biasing voltage from periphery supply – posive side
P +22V
2. TERMINAL DESCRIPTION
Although this is not a call, it is listed with the calls for convenience.
2.6 COMMUNICATION TERMINALS CONNECTION
2.6 COMMUNICATION TERMINALS CONNECTION
COM, DATA1 and DATA2 should be connected in all controllers in a group mode.
A shielded category 5 cable (CAT5) must be used where the shield is used to connect the COM
terminal.
Only one twisted pair is used for DATA1 and DATA2 connections.