NFS-320/E/C Installation Manual — P/N 52745:M2 7/1/14 35
Connecting a PC for Off-Line Programming Installation
Installation
This control panel supports one SLC loop, which connects to TB13 on the control panel. For details
on designing, installing and configuring SLC loops, see the SLC Wiring Manual.
3.13 Connecting a PC for Off-Line Programming
A PC can be hooked up to the control panel to allow the VeriFire Tools programming utility to
upload and download the operating program. Refer to the insert in the VeriFire Tools CD and to the
program’s on-line help function for instructions. There are two options for connection:
Two options are available.
1. For PCs with USB Ports, connect the PC to USB B via a standard USB B cable.
2. For PCs without USB Ports, connect the PC’s serial port to the Control Panel’s
Network/Service Connection (J1, NUP).
Note: T-Tapping is not allowed on a four-wire SLC.
SLC B (output loop)
SLC A (loop return)
SLC B SLC A
Style 4 SLC Loops Style 6 SLC Loops
SLC Loop Connections
on FACP’s main circuit board
TB13 on
NFS-320/E/C
nfs640-slcloops.cdr, CPU-320-SLC-TB.wmf
Figure 3.18 SLC Loop Connections and Wiring
NOTE: Download operations that change the basic program of the control panel must be
performed by responsible service personnel in attendance at the control panel. After downloading
a program, test the control panel in accordance with NFPA 72.
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