16
15390 Rev D 8/2/96 P/N 15390:D
EIA-485 In ( - )
EIA-485 Out ( - )
EIA-485 Out (+)
EIA-485 In (+)
TB2
TB1
4
3
2
1
Wiring Multiple Annunciators (6000-ft max run)
-
-
+
+
-
-
+
+
First Annunciator
Last Annunciator
ELR
Part #
71244
TB2
TB2
Control
Panel
EIA-485 (-)
EIA-485 (+)
5
4
3
2
1
Common In (-)
Common Out (-)
Power In (+24 VDC)
Power Out (+24 VDC)
Earth Ground
Figure 3: Slide-In Labels
Remove the center pages of this manual. If
using the custom user display labels, type
the appropriate information on the labels.
Carefully cut out the labels and insert them
into the annunciator by slipping them into
the label slots on the back side of the
annunciator face plate.
Note: To ensure the best fit, cut directly
along the dotted line surrounding each la-
bel.
Figure 4: Terminal Wiring
•
Do not "T-Tap" the EIA-485 circuit which must
be power-limited. It will not function properly.
Wire as shown below.
•
Leave the 120-ohm resistor installed across
the EIA-485 Out terminals at the last annun-
ciator on the circuit (see below). Remove this
resistor from all other annunciators.
•
Connect Earth Ground to a mounting screw
on the backbox or cabinet.
•
Connect 24 VDC Power to the annunciator.
This power must be power-limited but need
not be supervised by a power supervision
relay since it is inherently supervised by the
control panel (loss of communications is reg-
istered during loss of power to the annuncia-
tor).
Содержание ABF-1F
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