London Electronics ASR-GPS Configuration guide

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Document Ref: manuals\english\ASR-GPS.p65 Revision 2 Dated: 29 June 2009
Precision calendar / clock module
ASR-GPS
Connection details and general information
GPS derived atomic time reference with precision
backup timer.
London Electronics Limited
Thorncote Road, Near Sandy, Bedfordshire SG19 1PU
Tel [phone] Fax [phone]
www.london-electronics.com [email protected]

2
notes

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Alphabetic Index
Connections page 10
Data output page 11
Declaration of Conformity page 16
Description page 6
Dimensions page 8
Mounting page 9
Revision record page 13
Specifications page 12
Switches page 7
Warnings page 5

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Introduction
Please contact us if you need help, if you have a complaint, or if you have suggestions to help us
improve our products or services for you.
If you contact us about a product you already have, please tell us the full model number and serial
number, so that we can give you accurate and fast help.
This product has a 2 year warranty. We will put right or replace any item which is faulty because
of bad workmanship or materials. This warranty does not cover damage caused by misuse or
accident.
IMPORTANT
If this equipment is important to your process, you may want to buy a spare to cover possible
failure or accidental damage in the future.
This is because at some times, for example during our factory shutdown periods, you may have to
to wait several weeks for an equivalent replacement. Or, we may have no stock at the time you
urgently need it.
You may also need to pay extra carriage charges if you want a fast, guaranteed courier service.
Warranty repairs or replacements are normally returned with a standard courier service.
We do not offer any compensation for losses caused by failure of this instrument.
If you do not agree with these conditions, please return this item now, in unused, clean condition, in
its original packaging and we will refund the purchase price, excluding any carriage paid.
We thought you’d prefer to know about possible delays and extra charges now, rather than during
a panic.
We always try to improve our products and services, so these may change over time. You should
keep this manual safely, because future manuals, for new designs, may not describe this product
accurately.
We believe these instructions are accurate, and that we have competently designed and
manufactured the product, but please let us know if you find any errors.

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Safety First ..............Don't assume anything............. Always double check.
If in doubt, ask someone who is QUALIFIED to help you in the subject.
Warnings
Please carefully read all warnings and ONLYinstall the item when
you are sure that you’ve covered all aspects.
!
*Connect the equipment according to current IEE regulations and separate all
wiring according to IEC1010.
*Power supplies to this equipment must have anti-surge (T) fuses rated at 315mA for DC
supplies in the range 10-24 VDC.
*Check that the model number and supply voltage suit your application before
you install the equipment.
*Don’t touch any circuitry after you have connected the equipment, because there may be
lethal voltages on the circuit board or connector terminals.
*Only adjust on-board switches or connections with the power turned off.
*Make sure all screw terminals are tight before you switch the equipment on.
*Only clean the equipment with a soft dry lint-free cloth. Do not use any solvents.

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The ASR-GPS is a high precision date and time module, which can be used as a master to
feed one or more clock or date displays.
The master / slave arrangement ensures that all displays are perfectly synchronised.
A high precision reference oscillator is used for the timing, with a typical accuracy of +/- 3
seconds per month.
This is re-corrected whenever the module is in sight of 3 or more GPS satellites, which send it
high precision time data, referred to atomic standards.
The ASR-GPS is recommended for use in applications where a precist time reference is re-
quired and where the reference can be mounted in view of the sky.
Description

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Internal Switches
You will neet to open the case to access the terminals and configuration switches.
Remove the 4 corner screws, and lift off the lid, to reveal the circuit board.
Board layout subject to change without notice.
IMPORTANT:
You must unplug the power / signal connector before you change switch
positions.
Factory
Programming
Port
Spare ports
Do not use
Data Choice RS485 line settings
RS232
RS232
RS485
RS485
RS232
RS232
RS485
RS485
RS232 RS485
Short to bias RS485 B- Low
Short to bias RS485 A+ High
Short for 150R terminator

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Dimensions and weights
Case width :115.0 mm
Case forward projection :40.0 mm
Case height :65.0 mm
Cable gland height :20.0 mm
Typical weight :175 grams
Operating conditions :0 to 50 degrees C
Storage conditions :-20 to +70 degrees C
Case sealing :IP65
Case Material :PolyCARBONATE
Cable dimensions :Accepts CAT5 cable 4.5 to 6.5mm dia.
Flammability Class :V0 (UL94)
115mm
40mm
65mm
20mm

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Mounting the module
The ASR-GPS mounts onto a triangular wall bracket. The receiver can be wired up to 500
metres away from the device it will connect to.
Ideally, mount the receiver outside or near a window, with the label facing up, towards the sky.
25mm dia neoprene
friction washer
Swivel bracket
M8 Flat Washer
M8 Spring Washer
M8 x 12mm Pan Screw
Plate holes 6mm diameter
100mm centre-centre
Wall screws.
This face downwards

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Connections
WARNING:
Do not open the enclosure if moisture or dirt could contaminate the electronics. Only
open in clean, dry conditions.
Remove the 4 outer corner screws, so that you can lift the grey lid, to expose the electronic
assembly.
Feed your cable through the cable gland and wire to the terminal block as shown below.
Use good quality data cable with protective outer plastic sheath.
CAT5 cable is ideal.
Use one twisted pair for the Data A+ and Data B- link
Use a pair of twisted wires together for Power In + (Reduces voltage drop)
Use a pair of twisted wires together for Power In - (Reduces voltage drop)
See below ...
Some typical connections to London Electronics remote displays (refer to their manuals also):-
ASR-GPS INT-S panel mounting display S17XX large display
RS485 A+ Terminal 2 Green Data A(Term 3)
RS485 B - Terminal 3 Blue Data B (Term 4)
Common Terminal 1 Yellow Comm. (Term 2)
(Set rear switches for RS422/485) (Set for RS422/485)
Green/White RS485 B-
White/Green RS485 A+
Blue/White & White/Blue Common
Brown/White & White/Brown Power in -
Screen
Orange/White & White/Orange Power in +

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The data string is set to 9600 baud, 8 data bits, no parity, 1 stop bit.
It updates every second and is in one of these 3 formats, which you can request
at the time of order, or you can set via a simple terminal application, such as Hyperterminal...
1) HHmmSSDDMMYY,[DN],[SOURCE],[DST],[TZ]<CR><LF>
2) CCYYMMDDTHHmmSS,[DN],[SOURCE],[DST],[TZ]<CR><LF>
3) CCYY-MM-DD HH:mm:SS,[DN],[SRC],[DST],[TZ]<CR><LF>
Where:
HH is hours 00-23
mm is minutes 00-59
SS is seconds 00-59
DD is date 01-31
MM is months 01-12
YY is years 00-99
CC is century 00-99
[DN] is Day of Week 1-7
1 character
Sunday is day 1, Monday is day 2 etc
[SOURCE] is the time source
3 characters
GPS or RTC (GlobalPositioningSatellite live data or RealTimeClock internal reference)
[DST] is Daylight Saving flag
1 character
0 or 1
1 indicates daylight saving correction has been applied
[TZ] is time zone adjustment applied.
5 characters
+1200 to -1200.
Zero offset has a space instead of +/-
To adjust these settings yourself, you can use any RS232 ASCII terminal application.
A common example is HyperTerminal, a free application available on most Windows PCs
On your PC choose Start > Programs > Accessories > Communications > Hyperterminal
See http://www.london-electronics.com/terminal.php for help on setting this up.
Choose 9600 baud, not 1200 Baud.
Set the jumper switches in the ASR-GPS for RS232 and connect to your PC.
Press Enter then type the word Config (case sensitive) then press Enter again and you should
be presented with a setup screen to allow you to set time zones etc.
Data from the ASR-GPS

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Specifications
Power supply :11 to 30 V DC at up to 50mA.
Typically 25mA at 24VDC
Data output :RS485 or RS232
Precision :Within +/- 1 second
3.5 parts per million. approx +/- 10 seconds / month
if satellite updates are not received
Summer/winter time :Automatic correction
Time Zone setting :Set with PC configuration application
Case width :15.0 mm
Case forward projection :40.0 mm
Case height :65.0 mm
Cable gland height :20.0 mm
Typical weight :175 grams
Operating conditions :0 to 50 degrees C
Storage conditions :-20 to +70 degrees C
Case sealing :IP65
Case Material :Polycarbonate
Cable dimensions :Accepts screened cable 4.5 to 6.5mm dia.
Cable type :Low capacitance data cable, CAT5 preferred
Flammability Class :V0 (UL94)

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Revisions
Rev 0 Released 29 August 2007

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Notes

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Notes

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Declaration of Conformity
Conditions
The device covered by this certificate must be installed according to the following conditions :-
Cabling must be routed separately to heavy power carrying cabling (includes relay output wiring)
All signal cabling must be screened. The screen must only be connected to the power earth terminal
Signed as true and correct, for and on behalf of London Electronics Ltd.
......................................
We designed and manufactured this Product to meet the following specifications :
EN55022:1987 Conducted Emissions: Class B
EN55022:1987 Radiated Emissions : Class B
IEC801-2:1984 Electro-Static Discharge Immunity: 8kVAir
IEC801-3:1984 Radiated ElectroMagnetic field Immunity: 3V/m
The products conform with these standards:
EN50081-1:1992 (normative)
EN50082-1:1992 (normative)
and comply with the requirements of Council Directive 89/336/EEC for Electro-Magnetic Compatibility,
& are designed to meet 72/23/EEC safety directive.
J.R.Lees Director