Pilot Communications SPM90 - Page 21

18
Examples of errors:
Example 1
A circuit breaker is connected
between A and B point, which is
wrong!
12
11
10
9
8
7
6
5
3
4
21
V- input
Shunt
LOAD
PULSE+
PULSE-
NC
NC
POW+
POW-
485B
485A
V+ input
A B
QF
Example 2
A fuse is connected between A
and B point, which is wrong!
12
11
10
9
8
7
6
5
3
4
21
V- input
Shunt
LOAD
PULSE+
PULSE-
NC
NC
POW+
POW-
485B
485A
V+ input
FU