Terminal Mode EIA-485 Connections
Terminal Mode Configuration
LCD2-80 Instruction Manual —
P/N 53242:B1 10/25/2012
13
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 9.