3.3
DPM 904 ONLY
ZONE SELECTION: 7-WAY MULTICORE UNTERMINATED.
ZONE SWITCH 1
-
BROWN
ZONE SWITCH 2
-
RED
ZONE SWITCH 3
-
ORANGE
ZONE SWITCH 4
-
GREEN
COMMON
(OV)
-
BLACK
LED + VE
-
WHITE
LED - VE
-
BLUE
3.3
DPM 908 ONLY
ZONE SELECTION: 12 WAY MULTICORE UNTERMINATED.
ZONE SWITCH 1
-
BROWN
ZONE SWITCH 2
-
RED
ZONE SWITCH 3
-
ORANGE
ZONE SWITCH 4
-
YELLOW
ZONE SWITCH 5
-
GREEN
ZONE SWITCH 6
-
BLUE
ZONE SWITCH 7
-
VIOLET
ZONE SWITCH 8
-
GREY
COMMON (OV)
-
BLACK + FAWN
LED + VE
-
PINK
LED - VE
-
WHITE
When a zone selection switch is switched to the “ON” position, its related
wire is connected to
COMMON (OV).
4. OPERATION
4.1 DPM900/904/908
A close-talking noise-cancelling microphone is used for high noise level
environments (eg. manufacturing and stores areas, high activity offices or
banking `dealer’ rooms) with an optimum speaking distance of 5cms.
4.2
LR 900 LONG LINE LEVEL RAISING AMPLIFIER
A simple phantom powered level raising amplifier for DPM series paging
microphones is available separately. Mounted within the microphone base,
it enables long microphone lines to be employed without the usual
interference problems.
The LR900 mounting diagram and wiring instructions are detailed on a
separate Technical Installation Guide.
In some cases and in order to protect the amplifier, some tracks need to be
cut on the microphone PCB. Please floow the new LR900 Technical
Installation Guide and discard any previously published information.
Publication Code DPM_TIG Issue 1
Page 4 of 6
