NatComm MULTIPLE INPUT UNIT User manual

MULTIPLE INPUT UNIT
User Guide
For Technical Assistance
Please Phone: [phone]

Page 2 Natcomm
DESCRIPTION
Our MULTIPLE INPUT UNIT (MIU) accessory has been designed to allow
up to 12 separate Dry Contact Switches to be connected to one TDU
Talking Display Unit.
The TDU Talking Display Unit can then play one of up to 12 separate
messages, held in its memory, depending on which MULTIPLE INPUT
UNIT Switch has been triggered.
This means that :
Switch 1 when triggered will cause Message 001 to play
Switch 2 when triggered will cause Message 002 to play
Switch 3 when triggered will cause Message 003 to play
Switch 4 when triggered will cause Message 004 to play
Switch 5 when triggered will cause Message 005 to play
Switch 6 when triggered will cause Message 006 to play
Switch 7 when triggered will cause Message 007 to play
Switch 8 when triggered will cause Message 008 to play
Switch 9 when triggered will cause Message 009 to play
Switch 10 when triggered will cause Message 010 to play
Switch 11 when triggered will cause Message 011 to play
Switch 12 when triggered will cause Message 012 to play
Each Switch Trigger will cause the appropriate message to play, as
indicated above. TDU can only play one message at one time.
While the TDU is playing a message, the default settings of MIU allow it to
detect further triggering by the attached Switches and it will hold in buffer
up to 10 separate further triggers.
Then when each message is complete, the MIU will instruct TDU to play
the message corresponding to the next triggering action.
MIU is provided with a TWO YEAR FACTORY WARRANTY.

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DESCRIPTION Cont.
During Message play MIU can be configured to handle further Switch
triggering in 3 separate modes :
MODE 1 (Default Mode) MIU will STORE up to 10 further triggers
and then instruct TDU to play these Messages in trigger order. This
is the default mode.
MODE 2 - MIU will IGNORE any further triggering while playing a
Message. Triggering will only take place when a Message is NOT
PLAYING.
MODE 3 - MIU will INTERRUPT an existing Message. In this
situation a trigger during Message Play will cause the existing
Message to STOP and the NEW MESSAGE WILL PLAY.
The appropriate MIU Triggering Mode is set by REMOVING JUMPER
CONNECTORS which are linking PINS that are accessed through a small
hole located on the underside of MIU (see below).
Note : The Jumpers are not in order
To Set MODE 1 - Leave all 3 JUMPERS in place.
To Set MODE 2 - Remove JUMPER 1.
To Set MODE 3 - Remove ALL 3 JUMPERS.
Note : For Jumper Settings to update, you MUST power down the MIU by disconnecting the input cable
from the TDU for 15 seconds or more.
Jumper 1
Jumper 3
Jumper 2

Page 4 Natcomm
MODEL TABLE
Our MULTIPLE INPUT UNIT (MIU) accessory is available in 3 separate
models, for use with Normally Open switches :
MIU4 - Provides input capability for up to 4 (N.O. Switches)
MIU8 - Provides input capability for up to 8 (N.O. Switches)
MIU12 - Provides input capability for up to 12 (N.O. Switches)
MESSAGE DETAILS
Messages used with MIU should be in MP3 format and written to a 2GB
Flash Card supplied with TDU.
Important Note : When a TDU is used with an MIU, all messages loaded
onto the SD card should have a filename that begins with 3 numbers 001-
012.
This way TDU knows to play Message Filename 003xxxx when Switch 3
connected to the MIU is triggered. Similarly, TDU knows to play Message
Filename 002xxxx when Switch 2 connected to the MIU is triggered and
so on up to Message 012xxx, should an MIU12 be used.

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INSTALLATION
Switches connect to the MULTIPLE INPUT UNIT via a female DB25
connector.
A separate male DB25 connector, with exposed terminals is supplied with
to allow direct solder connection of cables leading to each Switch.
Each Switch has been allocated two specific pin positions on the DB25
connector as per the diagram and table on page 7.
MIU output 12V on the lower rows of pins, which are pins 14-25 (see P 6).
MIU is activated by the detection of 12V on pins 2 – 13, which results from
a remote (normally open) switch closure.
The remote switch must close for a minimum of 100mS to cause MIU to
respond.
Switches can be located up to 100m from the MIU unit, or greater than
100m from the MIU if low resistance wiring is used.
Communication: Between the MIU and TDU is achieved via a standard
6 Wire telephone cable. A short 6 Wire telephone cable is supplied with
the MIU, to allow for connection to TDU. This cable can be substituted if
necessary with any 6 Wire cable with a length up to 100m. Cat5 cable is
ideal.
Power: For MIU is supplied from the TDU via the same 6 Wire cable.
Note: a separate power input jack has been fitted to MIU to allow for
operation at distances greater than 100 meters from TDU. You can
connect 12VAC or 12VDC input (minimum 300mA, polarity independent)
to this jack if necessary.

Page 6 Natcomm
SWITCH DETAILS
Switches for use with the MIU must be Normally Open
NORMALLY OPEN SWITCHES do not need any modification.
SUPPLIED DB25 MALE SWITCH
CONNECTOR
Use this supplied connector to connect to your switches.
Connections are made by soldering the wires from the switch to the
pin positions as indicated on the next 2 pages.
Note : Pins 14-25 are all wired in COMMON to 12V within the MIU. This
means that if each remote switch has 1 leg wired in common to each
other, then only 1 switch need have both wires connected back to MIU.

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SUPPLIED DB25 MALE CONNECTOR
The SUPPLIED DB25 MALE CONNECTOR that is to connect to the
DB25 Male Output of MIU, should be wired as per the following table :
Pin 1 Not Used
Pin 2 Switch 1 - Pin 14 Switch 1 +
Pin 3 Switch 2 - Pin 15 Switch 2 +
Pin 4 Switch 3 - Pin 16 Switch 3 +
Pin 5 Switch 4 - Pin 17 Switch 4 +
Pin 6 Switch 5 - Pin 18 Switch 5 +
Pin 7 Switch 6 - Pin 19 Switch 6 +
Pin 8 Switch 7 - Pin 20 Switch 7 +
Pin 9 Switch 8 - Pin 21 Switch 8 +
Pin 10 Switch 9 - Pin 22 Switch 9 +
Pin 11 Switch 10 - Pin 23 Switch 10 +
Pin 12 Switch 11 - Pin 24 Switch 11 +
Pin 13 Switch 12 - Pin 25 Switch 12 +

Page 8 Natcomm
SPECIFICATIONS
Dimensions (all in mm) : 106 (W) x 106 (D) x 43 (H)
Weight : 200 – 250 grams
Power Supply : 12VAC or 12VDC min 500mA
Switch Input : Via DB25 Male Connector (supplied)
Compliance : Supplier Number N 782
WARRANTY
This device is guaranteed against defects from workmanship for a period
of two years (24 months) from the date of purchase.
In the event of failure, you should return the product, along with proof of
purchase date, and a written statement about the nature of the problem.
The obligation is solely to repair or replace the product. The warrantor is
not liable for any incidental or consequential damages due to such defects.
This Warranty shall not apply to any unit which has been subject to
alteration, modification, abuse, negligence, accident, external voltage/
lightning surge or used in any manner contrary to these instructions.
The user is responsible for freight costs to the repair point. The warrantor
will be responsible for freight costs in returning this unit back to the user.
Damage caused to this device or attached equipment, by lightning strikes
or over voltage surge is not covered under this warranty.
CASE SEALED AT FACTORY
OPENING THE CASE VOIDS THE WARRANTY