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Controller
Hardware and Accessories Setup and Utility
Appendix 1: Cable Remote Terminal Units (CRTU)
17
0 1 0 0 0 1
39
1 0 0 1 1 1
61
1 1 1 1 0 1
18
0 1 0 0 1 0
40
1 0 1 0 0 0
62
1 1 1 1 1 0
19
0 1 0 0 1 1
41
1 0 1 0 0 1
63
1 1 1 1 1 1
20
0 1 0 1 0 0
42
1 0 1 0 1 0
64
0 0 0 0 0 0
21
0 1 0 1 0 1
43
1 0 1 0 1 1
22
0 1 0 1 1 0
44
1 0 1 1 0 0
Important Note:
4-8-4 type remote units are actually 2 consecutive units on one card!
When defining a line, one binary switch must be left unused after each one of these types of
units! For instance: a unit that is defined as 10 (001010) will also include unit 11 (001011),
and therefore the next unit should be defined as 12 (001100).
Connecting the Cable to its Remote Units
When purchasing the cable, you must ensure that each wire is of a different color. It is
very important to maintain the continuity of insulation colors. The colors displayed in the
illustrations in this chapter are colors that are used extensively throughout the world. In
cables with different colors, it is important to note the letters. Crossing of wires may cause
damage to the adapter card. The controller should be turned off before any wiring activity
is performed on the remote units, and electrical power should not be renewed until you
have checked that the connection is correct. Following is the legend for the letters:
S-
Power Source
C-
Communication
G- Common
The logical format of the remote units line is parallel as followins
In practice, the line passes through an internal connection in each unit, so that pulling out
RTU adapter card in the controller
S (Power 24V)
C (Communication)
G (Common)
A B C
Lightning
protection
A B C
Ø COMM Ø SGNL Ø +24V Ø COMM Ø SGNL Ø +24V Ø COMM Ø SGNL Ø +24V
RTU A RTU B RTU C