Notifier AFP-200 - Page 88

88 AFP-200 Instruction PN 15511:F2 10/11/99
Figure C-2 LCD-80 ACS Mode EIA-485 Connection
• Power-limited and supervised.
• Maximum of four LCD-80s may be con-
nected to this circuit when powered by the
control panel.
• If LCD-80s are powered by a separate UL-
listed power supply, up to 32 may be con-
nected.
• 6,000 feet maximum distance (16 AWG)
between the control panel and the first or
last LCD-80 and between each LCD-80.
• Use twisted pair cable with a characteris-
tic impedance of approximately 120 ohms.
• EIA-485 circuit rated 5.5 VDC max.,
60 mA max.
• See the LCD-80 Manual for additional in-
formation.
• Set SW2 on the control panel to the
"ACS" position. (Set the switch to the right
position.)
Install 120 ohm
terminating resistor on last
LCD-80
TB5-1 (+)
TB5-2 ()
T
B
6
TX REF RX REF OUT OUT IN IN
T
B
5
T
B
4
Notes:
1) LCD-80s require connection of operating power! Connect 24 VDC power to TB1 terminal 3 (+) and TB1
terminal 4 (–). Power connections are supervised and power-limited.
2) The LCD-80 start address must be set to address 01. Switch SW2 must be set to "1", and SW3-1 and SW3-
2 must be set to "OFF". Set the LCD-80 to a size of 128 points. To use a 40-character display; set SW5
OFF and SW6 ON. To use a 20-character display; set SW5 ON and SW6 OFF.
LCD-80 ACS Mode EIA-485 Connections