Millbank DPM908 User manual

DESK PAGING MICROPHONES
________________________________________
INSTALLATION GUIDE
Publication Code DPM_TIG Issue 1
DPM900 DPM904 DPM908
PLEASE NOTE: THIS MANUAL AND THE NOTES CONTAINED HEREIN, IS COPYRIGHT AND
MAY NOT BE REPRODUCED EITHER WHOLLY OR IN PART, IN ANY WAY WHATSOEVER,
WITHOUT WRITTEN CONSENT OF MILLBANK ELECTRONICS.
PUBLICATION OF THIS INFORMATION DOES NOT IMPLY ANY AUTHORITY OR LICENCE FOR
THE UTILISATION IN ANY MANNER, IN ANY COUNTRY, OR ANY PATENTED OR REGISTERED
DESIGN FEATURES, MECHANICAL, ELECTRICAL OR AESTHETIC.
 MILLBANK ELECTRONICS
Millbank House, Charter Way, Hurdsfield Industrial Estate, Macclesfield, Cheshire, SK10 1ME, England
TEL: [phone] FAX: [phone] e-mail: [email protected]
In the interest of product improvement we reserve the right to change specification or design without notice.

Designed & Manufactured in the UK by
Millbank Electronics
Millbank Electronics Quality System is Registered by Lloyds
Millbank Electronics operate a Quality Management
System which meets the requirements of
BS EN ISO 9001 : 2000
Product Compliance to EC directives for Standard Products
All standard products conform to the relevant directives,
regulations and standards for electronic and associated apparatus.
The equipment is CE marked both on the apparatus and the packaging.
The Modular range of products for use in Mainframes must be used
in the configuration as described in the product literature.
Failure to use the modular products in the manner described
will invalidate the EC Compliance.
Our products meet the appropriate British and International standards. A product “Declaration of Conformity” Statement is
available for each of the product ranges (available on request). This covers both the EMC and Low Voltage Directives.
UNPACKING
While all Millbank equipment is carefully packed to prevent damage in transit, we recommend that the
equipment is unpacked and inspected immediately on receipt. If damage has occurred
please advise your carrier and your supplier who will arrange appropriate action.
If it is necessary to re-pack the equipment for onward shipping or returning to Millbank for service
PLEASE ENSURE THAT THE ORIGINAL PACKING OR EQUIVALENT IS USED.
KEEP THIS INFORMATION IN A SAFE PLACE
Equipment Serial No...........................................................
Supplied by.........................................................................
............................................................................................
Date.....................................................................................
Publication Code DPM_TIG Issue 1 Page 2 of 6

1. GENERAL INTRODUCTION
The DPM 900 series of desk paging microphones are designed for either
wall or surface mounting. Three basic versions are available; DPM 900
(single zone), DPM 904 (4 zone) and DPM 908 (8 zone).
The single zone type DPM 900 is supplied with a single length of 4-core
screened cable providing balanced mic and input access (PTT)
connections, terminated in a 3 pin XLR and flying lead (for priority contacts).
Multi zone types DPM 904 and DPM 908 are supplied with two 2 metre
lengths of connecting cable; 1 x 4-core screened (mic. and access)
terminated with a 5-pin din and either 7 way or 12 way (zone selection) for
the DPM 904 and DPM 908 respectively.
2. INSTALLATION AND OPERATION
2.1. PRECAUTIONS AND PREPARATION.
Avoid siting the equipment in the proximity of mains power supplies and
cables so as to avoid the possibility of hum associated with electro-
magnetic coupling.
3. CONNECTION DETAILS DPM 900, DPM 904, DPM 908.
3.1 AUDIO ACCESS FOR DPM900:
4-WAY SCREENED CABLE (MIC & ACCESS), TERMINATED IN A 3 PIN
XLR PLUG WITH A FLYING LEAD.
PIN 1 - BALANCED MIC - RED
PIN 2 - SCREEN - DRAIN WIRE
PIN 3 - BALANCED MIC - BLACK
FLYING LEAD - ACCESS (PTT) - GREEN
FLYING LEAD - ACCESS (PTT) - WHITE
3.2 AUDIO ACCESS FOR DPM904 & 908:
4-WAY SCREENED CABLE (MIC & ACCESS), TERMINATED IN 180°5-
PIN NON-LOCKING DIN PLUG.
PIN 1 - BALANCED MIC - RED
PIN 2 - SCREEN - DRAIN WIRE
PIN 3 - BALANCED MIC - BLACK
PIN 4 - ACCESS (PTT) - GREEN
PIN 5 - ACCESS (PTT) - WHITE
NOTE: Pins 4 & 5 are shorted when PTT (press-to-talk) button is pressed.
Publication Code DPM_TIG Issue 1 Page 3 of 6

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

5. MAINTENANCE
In the event that the product becomes faulty during the warranty period,
please return the faulty apparatus to your supplier.
If repair can not be carried out by the supplier then the unit should be
returned to Millbank Electronics together with details of module type, serial
number and purchase details.
Any repairs or modifications to the product by unauthorised personnel will
invalidate the warranty.
6. SPECIFICATIONS
6.1 DPM TECHNICAL SPECIFICATION
IMPEDANCE 200 Ohms nominal
SENSITIVITY 83dB 3dB (ref OdB = 1V u Bar)
FREQUENCY RESPONSE 150 hZ - 10Khz Contoured for High Speech
Intelligibility.
DYNAMIC RANGE Approx. 90 dB
POLAR RESPONSE CARDIOID
“BUSY” INDICATOR GREEN LED, With 2K7 Series Resistor
Fitted to suit 24-30V DC Supply – NA to the
DPM900
SWITCHES:-
1. PUSH-TO-TALK Momentary Action, 2 Pole c/o P/Button
2. ZONE SELECT Latching Action Rocker
FINISH:-
1. MICROPHONE Matt Black, Plated
2. BASE Black and Blanc White Eggshell Powdercoat
3. SWITCHES Black
Publication Code DPM_TIG Issue 1 Page 5 of 6

6.3 FIXING DETAILS
Shown actual size rear (base) fixings
10.0 69.0
152.0
15.0 75.0
105.0
IN CASE OF SERVICE REQUIREMENTS PLEASE CONTACT THE SUPPLIER
IN THE EVENT OF DIFFICULTY COMMUNICATE DIRECT TO:
MILLBANK ELECTRONICS Customer Service
Millbank House, Charter Way, Hurdsfield Industrial Estate, Macclesfield, Cheshire SK10 1ME
Telephone: + 44 (0) 1625 511 666 - Fax: [phone]
Web-site: www.millbank.co.uk E-mail: [email protected]
Publication Code DPM_TIG Issue 1 Page 6 of 6