ADT Unimode 400 Multi-Net Installation Manual page 177

Connecting Annunciators
&RQQHFWLRQ *XLGHOLQHV
1RWH
5HIHU WR WKH $'7/&'
0DQXDO IRU DGGLWLRQDO
LQIRUPDWLRQ
&RQQHFWLQJ
$'7/&'V LQ
7HUPLQDO 0RGH
Unimode 400 Installation PN 50710:A 10/22/97
An ADT-LCD-80 operating in Terminal mode connects to TB3 on the CPU using a
looped power-limited and supervised EIA-485 circuit as shown in Figure A-1.
• Maximum distance between the control panel and the first or last ADT-LCD-80
and between each ADT-LCD-80: 6,000 feet (using 16 AWG wire).
• Use overall foil/braided-shield twisted-pair cable suitable for EIA-485
applications.
• An EIA-485 circuit is rated at 5.5 VDC max., 60 mA max.
• For non-English language systems, ADT-LCD-80 standby current equals the alarm
current (100 mA).
• Each ADT-LCD-80 must connect to regulated 24 VDC power. Power an
ADT-LCD-80 from the MPS-400 power supply or a separate UL-listed power
supply (For power connections, see Figure A-3 on page A-15.)
Set ADT-LCD-80 DIP switches as follows:
1. Install R-120 resistors across the IN and OUT terminals of each ADT-LCD-80.
2. Set SW4 and SW5 on the ADT-LCD-80 to the TERM position (SW1-7 ON).
3. Set DIP Switch SW3-1 and SW3-2 to OFF on all ADT-LCD-80s except the last
ADT-LCD-80.
4. Set SW3-1 and SW3-2 to ON on the last ADT-LCD-80.
² (,$ ,Q
² (,$ 2XW
 (,$ ,Q
 (,$ 2XW
(,$ 2XW
² (,$ ,Q
² (,$ 2XW
 (,$ ,Q
 (,$ 2XW
/DVW $'7/&'
5 UHVLVWRU
LQVWDOOHG DFURVV WKH ,1 DQG
287 WHUPLQDOV RQ HDFK
$'7/&'
)LJXUH $ 7HUPLQDO 0RGH (,$ &RQQHFWLRQ
3




)LUVW $'7/&'
3




(,$
5HWXUQ
 ²  ²
&38 7%
,Q 2XW
$SSHQGL[ $ $QQXQFLDWRUV
6KLHOGHG
7 ZLVWHGSDLUV
(,$
2XWSXW
A-13