$SSHQGL[ $ $QQXQFLDWRUV
&RQQHFWLRQ *XLGHOLQHV
&RQQHFWLQJ /&'V LQ
$&6 0RGH
1RWH
3RZHU FRQQHFWLRQV DUH
VXSHUYLVHG DQG SRZHUOLPLWHG
A-14
www.PDF-Zoo.com
/&'$&60RGH(,$&RQQHFWLRQ&387%
When operating an LCD-80 in ACS Mode, the LCD-80 connects to TB4 on the CPU
using a looped EIA-485 circuit as shown in Figure A-2.
•
EIA-485 circuits are power-limited and supervised.
•
LCD-80s require connection of operating power.
•
Maximum distance between the control panel and the first or last LCD-80 and
between each LCD-80: 6,000 feet (using 16 AWG wire).
•
If powering LCD-80s by a separate, UL-listed power supply, you can connect up to
32 devices.
•
Use twisted-pair cable with a characteristic impedance of approximately 120 ohms.
•
The EIA-485 circuit is rated 5.5 VDC max., 60 mA max.
•
Refer to the LCD-80 Manual for additional information.
1.
Connect EIA-485 power to CPU terminals TB4-1 (+) and TB4-2 (–).
2.
Set the LCD-80 start address to address 01.
3.
Set SW2 to 1; set SW3-1 and SW3-2 to OFF.
4.
Set the LCD-80 to a size of 128 points.
5.
Set the character display: To use a 40-character display, set SW5 OFF and SW6
ON; to use a 20-character display, set SW5 ON and SW6 OFF.
6.
Install a 120 ohm terminating resistor on the last LCD-80.
² (,$ ,Q
² (,$ 2XW
(,$ ,Q
(,$ 2XW
² (,$ ,Q
² (,$ 2XW
(,$ ,Q
(,$ 2XW
&38
)LJXUH $ /&' $&6 0RGH (,$ &RQQHFWLRQ
3
7HUPLQDWLQJ UHVLVWRU
RQ ODVW /&'
/DVW /&'
3
)LUVW /&'
(,$
5HWXUQ
AFP-300/AFP-400 Installation PN 50253:C1 05/22/97
Connecting Annunciators