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When the LCD2-80 is set for Terminal Mode it operates like a CRT terminal without full keyboard capability, but with the advantages of
24 VDC power, wall mount, and multiple terminal location with Acknowledge, Signal Silence, Drill and Reset.
NOTE: When LCD2-80s are used on the same EIA-485 circuit as
LCD-80s, the LCD2-80s must be at the furthest end of the circuit from the panel.
Notes:
•
EIA-485 circuits have a maximum of 6000 feet between units.
•
Up to 32 LCD2-80s may be used on the EIA-485 circuit (consult control panel's battery calculations).
•
Between each LCD2-80 are four wires: A twisted-shielded pair for data communications and an open pair for 24 VDC power. The
return circuit only requires two wires for data communication.
•
The EIA-485 interface used in Terminal Mode should not be confused with an EIA-485 circuit used in ACS Mode (annunciator
interface).
•
The EIA-485 terminal interface does not support the use of RPT-485 repeaters.
2.1 Switches
DIP switches at SW3 must be set for terminal mode, and SW10 (ACS/TERM Mode switch) must be set to TERM.
Setting the DIP switches:
Refer to "DIP Switches - SW3" on page 9 for a full explanation of all the switch settings. For switches 3-1, 3-2, and 3-4, set as necessary
according to the explanations. For 3-3, 3-5, 3-6, 3-7 and 3-8, set as follows for Terminal Mode:
3-3 - Set ON if this LCD2-80 is being used with an ONYX panel.
Set OFF if it will be used with a legacy panel.
3-5 - Set ON on last LCD2-80 on the EIA-485. Otherwise, set OFF.
3-6 - Set OFF.
3-7 and 3-8 - Set ON.
Setting the ACS/TERM Mode switch:
Set this switch (SW10) to T (TERM).
2.2 Terminal Mode EIA-485 Connections
See Figure 2.2 for wiring diagram; the following requirements must be observed:
•
Power-limited and supervised.
•
Maximum of 32 LCD2-80s may be connected to this circuit.
•
6000 feet maximum distance (@ 16 AWG) between the control panel and the first or last LCD2-80 and between each LCD2-80.
•
Use overall foil/braided-shield twisted pair cable suitable for EIA-485 applications, terminated to earth at one end.
•
EIA-485 circuit rated 5.5 VDC max., 60 mA max.
•
The LCD2-80s require connection of operating power. Connect 24 VDC power to the nonresettable power connections on the
panel, or other appropriate power source as defined in "Power Connections (TB1)" on page 8.
LCD2-80 Instruction Manual — P/N 53242:B5 07/26/2019
Section 2: Terminal Mode Configuration
Terminal
Mode
Fire Alarm
EIA-485
Control Panel
24 VDC
(Maximum 6000 feet from last LCD2-80 to FACP)
Figure 2.1 Block Diagram of LCD2-80s in Terminal Mode
Terminal Mode EIA-485 Return
11
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