7800 Controller - User Manual - Scott Safety

Model 7800 Users Manual
Revision E
Remove power from the controller. Reapply power and as the alarm LED's begin
scrolling down, hold the following keys simultaneously "UP", "DOWN", "NEXT", &
"EDIT". Watch closely. The 4-digit authorization code appears briefly at bottom left of
the screen.
IMPORTANT! DO NOT hold the keys before applying power since this causes a cold
boot and returns all settings back to factory defaults.
Authorization
ENTER NAME
Ent er Code ####
Lock Syst em
Figure 2.17
2.5 LCD CONTRAST ADJUSTMENT
The Setup menu item identified as CONTRAST allows users to adjust the LCD contrast
to a level suitable to the ambient lighting. Selecting CONTRAST and pressing EDIT
causes the UP/DOWN keys to increase and decrease LCD contrast.
SECTION 3
!
3.0 MAIN I/O INTERFACE PCB 093-0243 / 093-0568
093-0243 and 093-0568 Main I/O Interface PCB’s are equivalent except the 093-0568
has ribbon cable connector J1 mounted on the back of the PCB. 093-0243’s are supplied
on all wall mount models while the 093-0568 is supplied only on the MODEL 7800PM
panel mount.
The most basic MODEL 7800 Controller requires only the I/O PCB shown in Figure 3.1
for interfacing to field wiring. The MODEL 7800 primary power supply is applied to
terminals 9 & 11 of TB2. This may be from 10 – 30 VDC. WARNING! HIGH
VOLTAGES SUCH AS 115 VAC APPLIED TO THESE TERMINALS MAY
CAUSE SEVERE DAMAGE! DC output terminals 10 & 12 on TB2 provide up to
500mA of output power for powering remote devices such as lamps, transmitters etc.
This PCB includes both master (COMM 1) and slave (COMM 2) RS-485 Modbus ports,
5 amp form C relays for each common alarm event (A1, A2, FAULT/A3 & HORN), and
power supply I/O terminals. JP1 allows the RS-485 ports to be configured for 2 or 4 wire
operation. A 26 pin ribbon cable connects the I/O PCB to the MODEL 7800 CPU and
Display nest assembly. Two I 2 C bus connectors allow addition of optional functions such
as analog I/O and discrete alarm relays for each channel.
Horizontal jumpers installed in JP1 connect the RS-485 port’s RX & TX lines,
simplifying 2 wire daisy chains by providing additional terminals for incoming and
outgoing cables. For example, installing the 2 COM 1 jumpers connects screw terminals
Scott Safety
20
087-0021 Rev F