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ELECTRICAL CONNECTIONS
NIM-1W On An XNET Network
Figure 3 shows the wiring diagram for the NIM-1W on
an XNET network. Up to 32 MXL and/or XLS Sys-
tems can be connected in the XNET network with an
NIM-1W installed in each MXL System. For the
highest level of fault protection, install the NIM-1W in
the enclosure with the MMB, although this is not
necessary. When connecting more than 32 MXL
Systems, an REP-1 repeater, a D2300CPS or a
D2325CPS is required. Refer to the REP-1 Installa-
tion Instructions, P/N 315-092686, the D2300CPS
Installation Instructions, P/N 315-050018 or the
D2325CPS Installation Instructions, P/N 315-050019,
as applicable, for the wiring diagram.
The XNET network can be installed as either Style 4
or Style 7. Figure 3 shows which wires must be added
to support Style 7. Style 7 is required in Canada.
Each NIM-1W is shipped with two 120 ohm EOLRs—
only two are required for each network pair. Install an
EOLR at the ends of each network pair. Do not
install an EOLR at each NIM-1W. (A simple rule of
PAIR B
(OMIT FOR STYLE 4)
SUPERVISED
POWER LIMITED
PAIR A
SUPERVISED
POWER LIMITED
DO NOT USE
DO NOT USE
1
2
3
4
5
6
9
10
11
12
13
14
SEE NOTE 7
NIC-C
(MUST BE IN SAME ENCLOSURE AS THE PMI)
ONE SLOT OF CC-5
17
18
19
20
21
DO NOT USE
NOTES:
1.
No EOLR required for NIC-C.
2.
The screw terminals can accommodate one 12-24AWG or two 16-
24AWG.
3.
From the NCC-2F to NIM-1R, NIM-1W or NCC-2F:
80 Ohms max. per pair.
Unshielded twisted pair - .5μF line to line
Shielded twisted pair - .3μF line to line, .4μF line to shield
Connecting the NIM-1W to the NCC/Desigo CC and FireFinder-XLS
7
8
1
2
3
NCC-2F
LOCATED INSIDE NCC/
15
16
DESIGO CC/VNT
NOTE:
DO NOT USE
IF THE NCC/DESIGO CC/VNT
IS LOCATED AT THE END OF THE
XNET NETWORK, INSTALL EOLR
P/N 140-820350 ACROSS
TERMINALS 1 & 2 AND 3 & 4.
22
23
24
thumb for the NIM-1W: an EOLR must be installed
where only a single wire lands on a screw terminal.)
Do not T-tap the network wiring. If T-tapping is
required, use the REP-1 repeater. Refer to the REP-1
Installation Instructions, P/N 315-092686, the
D2300CPS Installation Instructions, P/N 315-050018
or the D2325CPS Installation Instructions, P/N 315-
050019, as applicable, for the wiring diagram.
For Style 4 wiring, terminate the secondary network
pair (terminals 3 and 4) on each NIM-1W with an
EOLR.
Network Command Center (NCC/Desigo CC)
Figure 4 shows the wiring to the NCC/Desigo CC.
To connect the NCC/Desigo CC, observe the following
restrictions:
1. Give the NCC/Desigo CC a panel number. (This
panel number is in addition to the panel number
for the MXL System that the NCC/Desigo CC
connects to.)
2. The total number of panels in the XNET must not
exceed 64, including the NCC/Desigo CC.
4
5
2
1
NIM-1R / NIM-1W
4.
From the NCC-2F to NIC-C:
2000 feet (33.8 ohms) max. per pair between CC-5s/CC-2s.
Unshielded twisted pair
.25μF max. line to line
Shielded twisted pair
.15μF max. line to line
.2μF max. line to shield
5.
Use twisted pair or twisted shielded pair.
6.
Terminate shields at one end only.
7.
Power limited to NFPA 70 per NEC 760.
8.
CC-5 terminals 9 - 14 are not connected and can be used to tie shields
together.
9.
Positive or negative ground fault detected at <10K ohms on pins 3-4,
7-8 of the NIC-C.
10.
Each pair independently supervised.
11.
Maximum voltage 8V P-P.
12.
Maximum current 75mA during message transmission.
Figure 4
5
TO ADDITIONAL
NIM-1Rs, NIM-1Ws,
NCC-2Fs OR NIC-Cs
MOM-4
4
3
TB3 OR TB4
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