
ECC-FFT Instruction Manual —
P/N LS10031-000FL-E:B 9/4/2013
17
SLC Device Installation
Installation
2.7 SLC Device Installation
2.7.1 List of SLC Devices
The following SLC device can be used with the Fire Fighters Phone. See the device installation
instructions for more information (packaged with the device). Refer also to the SLC Wiring Man-
ual #51309for more information.
2.7.2 Maximum Number of Devices
The ECC-FFT supports up to 24 MMF-301 devices on one FFT system.
2.7.3 Wiring Requirements for SLC Device
The following information applies to the MMF-301 - Mini Monitor module.
Wiring SLC in Style 4 (Class B) Configuration
No special wire is required for the ECC-FFT SLC loop. The wire can be untwisted, unshielded,
solid or stranded as long as it meets the National Electric Code 760-51 requirements for power lim-
ited fire protective signaling cables. Wire distances are computed using copper wire.
Maximum wiring resistance is 40 ohms to the farthest SLC device.
Maximum loop length depends on the wire gauge.
!
WARNING: RISK OF EQUIPMENT DAMAGE AND PERSONAL INJURY
SEVERAL DIFFERENT SOURCES OF POWER CAN BE CONNECTED TO THIS UNIT. ALWAYS
DISCONNECT ALL SOURCES OF POWER BEFORE INSTALLING OR SERVICING.
Part Number
Model Name/Description
Install Sheet PN
MMF-301
Mini Monitor Module
I56-3654
I300
Fault Isolator Module
I56-1381
Wire Gauge
Max. Distance
22 AWG
1200 feet
18 AWG
3100 feet
16 AWG
4900 feet
14 AWG
7900 feet
12 AWG
10,000 feet