BECKWITH ELECTRIC M-4272, Instruction Book

Page: 23 / 217

–22–
M-4272 Digital Motor Bus Transfer System
Figure 5
External Connections
1.
88888
WARNING
: ONLY DRY CONTACTS
must be connected to inputs (terminals 45 through 50 with 51 common and terminals 5 through 16
with 1 through 4 common) because these contact inputs are internally wetted with 24 V dc. Application of external voltage on th
ese inputs
may result in damage to the units.
2.
88888
WARNING:
The protective grounding terminal must be connected to an earthed ground any time external connections have been made
to the unit.
3.
3
CAUTION:
Before making connections to the Trip/Close Circuit Monitoring input, see M-4272 Instruction Book Section 5.5, Circuit Board
Switches and Jumpers, for the information regarding setting Trip/Close Circuit Monitoring input voltage. Connecting a voltage o
ther than the voltage
that the unit is configured to may result in mis-operation or permanent damage to the unit.
4.
3
CAUTION:
Connecting the M-4272 Close Coil Monitor (CCM) in parallel with other relay CCMs in the Close Coil Circuit where the anti-pump
"Y"
relay is not bypassed may not provide reliable breaker closing operation.
48 125 250 24
.
QE
.
T
N
O
C
.
D
NI
D
E
TS
IL
CU
S
83F4
R
2
1
3
4
B
E
C
K
W
ITH
E
LE
C
TR
IC
C
O
.
IN
C
.
72
7-
5
44-
2
3
2
6
61
90
11
8
th
A
V
E
N
O
.
L
A
R
G
O
,
F
L
3
3
773
OU
T
P
U
T
S
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
PU
T
S
RT
N
R
S
485
CO
M
3
IN
6
IN
5
IN
4
IN
3
IN
2
IN
1
IN
PU
T
S
RT
N IN
SE
LF
-T
E
S
T
OU
T
P
U
T
S
PS
1
PS
2
F1
F2
3A
M
P
,2
5
0
V
(3A
B
)
F3
F4
60
-1
40
V
A
C
50
/60
H
z
8
78
SOURCE 1
75
76
77
41
+
42
43
44
-
IS1
48
46
45
47
49
50
79
80
82
81
83
84
85
86
52
51
53
54
55
56
58
57
60
59
61
7
92
89
87
88
90
91
93
94
96
95
97
3A
M
P
,2
5
0
V
(3A
B
)
1
68
+
65
63
62
64
6
66
67
5
S
P2
-
4
S
P
69
71
70
3
72
73
74
2
1
5
CLOSE S1
98
99
18 8
6
-5
6
2
5-
5
5 26
6
8-
5-
1 8
IRI
G
-
B
14
13
12
11
10
9
CCM-2
TCM-2
CCM-1
TCM-1
16
15
IN RS232 COM 2
-
+
+
-
+
-
-
+
8
7
9
10
11
12
17
18
16
15
14
13
P/S
TRIP
S1
TRIP
S2
CLOSE S2
52SP/
S2
52a/
S2
52b/
S2
52SP/
S1
52b/
S1
52a/
S1
SOURCE 2
S2 I
SOURCE 1
SOURCE 2
RA
TED VOL
TAGE (NOMINAL)
RA
TED CURRENT (NOM)
1A
5A
COM 2
ETHERNET
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
-
+
MODEL: M-4272
FIRMW
ARE: D-0135
SERIAL
NO.
60Hz
50Hz
W
ARNING! CONT
ACT
WITH
TERMINALS MA
Y
CAUSE ELECTRIC SHOCK
FOR CONT
ACT
RA
TINGS SEE INSTRUCTIONAL
MANUAL
37
38
39
40
100
101
102
103
BUS
VA
AB VV
BC
B V
V
CA
C V
VAB
A V
VC
CA
V
VB
BC
V
VC
CA
V
VB
BC
V
VAB
A V
LOCKOUT
BLOCKING
!
~
~
~