DSU500V1_0.hex
This file contains the operating firmware of the DSU500 and is used to perform a firmware update for
new features or bug fixes. This file will be available from time to time on our website.
The DSU500 does not need this file to be present to operate as it is merely used during firmware
updates.
The file is named DSU500V1_0.hex which describes the following:
DSU500
Product name
V1_0
Version 1.0
.HEX
Intel hex format of the data within the file
Internal jumper settings
WARNING.
ENSURE THAT YOU HAVE NO STATIC CHARGE BEFORE REMOVING THE LID BY TOUCHING
SOMETHING EARTHED SUCH AS THE CASE OF YOUR COMPUTER.
To access the jumpers, disconnect the power and carefully remove the lid by removing the 3 screws.
The jumper block is labelled ‘JP2’ and jumpers are marked 1 to 5.
1
Future use
2
Future use
3
Future use
4
PERFORM FIRMWARE UPDATE (remove after use)
5
Enable USB port
Jumper link 4
This jumper should only be fitted when performing a firmware update, see ‘Firmware update’ for further
information. Note. This link will normally be supplied but fitted on position 1.
Jumper link 5
This jumper link is factory fitted but can be removed to disable the USB port to prevent unauthorised
access to the files within the DSU500.
Connections
Power
The DSU500 operates on 9 to 15V DC only such as from a regulated power supply or battery.
Connect the power supply to the terminals 12V and GND observing correct polarity.
The DSU500 has an internal self-resetting fuse in the event of the polarity being incorrectly connected.
Trips
The four trips can be connected to external volt free contacts and the common GND.
These trip inputs are used to initiate playback of the four audio files by momentarily grounding the
relevant trip input.
The trip inputs have internal pull-up resistors to 3.3V and are normally activated by grounding the
relevant trip input.
Warning: Do not apply more than 5V to the trip inputs if driving the DSU500 from non
volt free connections, such as an external logic controller, as damage will occur.
USB port
This mini USB port is only used for loading the files onto the DSU500 and can be disabled after
programming to prevent unauthorised use by removing JP2 link 5 (see above)
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