1 one location, 2 two locations, 3 three locations – EFJohnson 3000 SERIES User Manual
Page 161: 5 m-lead splitter box, 1 general, 2 installation, M-lead splitter box, General -5 installation -5, Wam e&m lead cable layout 2 locations . 19-5, M-lead splitter box i/os -5
WIDE AREA MODULE (WAM)
19-5
19.4.1 ONE LOCATION
When only one WAM is used no E&M Lead
external connections are necessary.
19.4.2 TWO LOCATIONS
Cross-connecting between the Switches/Links
requires the use of the additional WAM M-Lead output
(see Figure 19-4).
19.4.3 THREE LOCATIONS
A WAC that consists of three or more Locations
with Switches/WAMs at each requires the use of the
M-Lead Splitter Box (see Section 19-5). The Splitter
Box splits one M-Lead input into six M-Lead outputs.
Seven boxes would allow a total of seven Locations
with Switches/WAMs at each to participate in a WAC
before needing a second box per Location (see
Figure 19-6).
NOTE: The M-Lead Splitter Boxes are needed only at
the Locations where two or more E&M Links connect
to WAMs. Notice in Figure 19-3 that the M-Lead
Splitter Box is not needed since there is only one E&M
Link interface.
19.5 M-LEAD SPLITTER BOX
19.5.1 GENERAL
The M-Lead Splitter Box Kit (PN 250-3239-300)
is to be used with WAMs that allow Wide Area Calls
(WAC) over links that utilize 4-Wire E&M Lead
circuits. The M-Lead Splitter Box (PN 023-3239-300)
provides up to six M-Lead outputs with one M-Lead
input.
19.5.2 INSTALLATION
The box is powered by +12V on pin 1. The +12V
supply can be obtained from the Switch Bus Bar. The
spades of the cable (PN 023-3239-320) in the kit are
connected to the bus bar (Red to +12V, Black to
ground) and the stripped ends of the cables are
connected to the terminal block of the M-Lead Splitter
Box (Red to pin 1, Black to pin 2), see Figure 19-5.
A maximum of 10 boxes may be powered by one
cable by daisy-chaining the rest of the power inputs.
Refer to System Configuration diagrams or
Figure 19-6 for the usage of the M-Lead I/Os.
Figure 19-4 WAM E&M LEAD CABLE LAYOUT 2 LOCATIONS
MA
MB
EA
EB
TXS+ (MA2)
TXS- (MB2)
EA
EB
MA
MB
WAM/SWITCH 1
LINK EQUIPMENT
EA
EB
MA
MB
MA
MB
EA
EB
TXS+ (MA2)
TXS- (MB2)
LINK EQUIPMENT
WAM/SWITCH 2
LOCATION 1
LOCATION 2
Figure 19-5 M-LEAD SPLITTER BOX I/Os
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
N
C
M
B
6
O
U
T
N
C
M
A
6
O
U
T
M
B
5
O
U
T
M
A
5
O
U
T
M
B
4
O
U
T
M
A
4
O
U
T
M
B
3
O
U
T
M
A
3
O
U
T
M
B
2
O
U
T
M
A
2
O
U
T
M
B
1
O
U
T
M
A
1
O
U
T
M
B
I
N
M
A
I
N
G
R
O
U
N
D
+
1
2
V