USER`S MANUAL
Contents
1. date and time can be set for the onboard real time clock 12 76 will display the current date and time and prompt for any changes The clock is a 24 hour clock and requires times to be entered in that format Remote and Local addresses The local address is the identification number of the unit The remote address is the identification number of the unit that this unit talks to In order to get two units to talk to each other they must have their own ID number as the remote address in the Other unit for example Two units are set up one with ID 01 the other ID 02 the remote and local addresses would be set as follows Unit ID Local Address Remote Address Poll time This is how frequently the unit will send the status of its inputs without any inputs changing Only ONE of the units should be set to poll The polled unit will respond with its status automatically The poll time is anywhere from 1 to 255 minutes Enter the polling rate required Setting 0 minutes prevents the unit from sending a poll however it will still respond to polls from the other unit SALCOM 12 76 0000 Telemtery Unit 5 1 5 Issue 1276UD 1106 Comms failure timeout This feature is set to allow the user to detect when the communications link between units has failed Upon a communications failure being detected the unit will close digital output 7 Digital output 7 will remain closed until the communications link is detected again The feat2. based graphical interface Since such software is usually proprietary Ping TXD it is generally developed to the customer s specification Pind NIC 1 3 Cellular phone data as SMS Access Pins Ground 1 4 Custom made solutions Pin6 uaan N C Pin7 oo N C Pin8 N C 2 EXTERNAL CONNECTIONS PinQ an N C Access to the Power terminals and I O ports is via externally accessible screw less terminals A 9 pin female D9 socket is wired DCE for RS232 serial communication All other connections i Option 3 Onboard radio 7 x SMA female socket depend on options fitted Sea Air and Land Communications Ltd Page 3 Sea Air and Land Communications Ltd Page 4 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 INPUTS AND OUTPUTS 8 1 DIGITAL INPUTS Eight digital inputs are provided These are buffered and have pull ups to 12V with a series input resistor which results in approx 10 volts appearing on an un terminated input Each input is activated by pulling to ground via a switch open collector open drain etc When grounded each input will source approx 2 4 milli amps These inputs are tolerant of 15 volts DC 3 2 DIGITAL OUTPUTS 8 digital outputs are provided These are each one pair of dry relay contacts just a switch The relay contacts can handle 1 Amp at 24 Volts DC Greater loads can be controlled by using the output to switch a relay with a higher rating MAINS VOLTAGES MUST NOT BE APPLIED Each relay has an LED to indica
3. from 0 24 volts full span they will of course need to deal with the readings in their software The yellow PTT LED will indicate when the unit is transmitting The yellow AUX LED will normally be in a flashing state 1 sec to indicate the unit is functioning Sea Air and Land Communications Ltd Page 5 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 BACK TO BACK MODE In this configuration the two 12 76 units are programmed with each other s address Any change in the status of the inputs on either unit will initiate a transmission to the other unit which is acknowledged immediately By this method the outputs on each unit will mimic the inputs of the other As there are only two analogue outputs available these are mapped to the first two analogue inputs on the remote unit Analogue 1 amp 2 These first two inputs are factory calibrated for a 0 5 Volt input to match the 0 5 Volt remote outputs The remaining analogue inputs are intended for use with a PC based program As an option a special 12 14 output module offering a pair of 4 20 milliamp outputs is available Setup mode can be accessed by sending to the built in serial port at any time during operation To indicate that the unit is in setup mode the AUX LED will flash rapidly During normal operation the AUX LED flashes slowly 1sec clock While in setup mode all incoming messages will be ignored except the setup commands on the built in serial port Also no
4. packets will be sent out and all the timers I Os and events of the normal state event machine are stopped An automatic return out of the setup mode and restart will be implemented if there is no incoming data on the built in port for more than 10min 5 1 BACK TO BACK MODE CONFIGURATION Entering setup mode 1 Connect the 12 76 serial port to a computer running terminal software set to 9600 baud No parity 8 data bits and 1 stop bit 9600 n 8 1 2 Apply power to the 12 76 3 The 12 76 will send its sign on string SALCOM 12 76 SE Telemetry Unit Firmware version 1 10 Point to Point Mode My local address 78 Remote address 01 Date 06 11 06 Time 08 32 16 4 Send to the 12 76 with the terminal software Sea Air and Land Communications Ltd Page 6 SALCOM 12 76 0000 Telemtery Unit 5 5 1 1 5 1 3 Sea Air and Land Communications Ltd Page 7 Issue 1276UD 1106 The setup menu will now be displayed SALCOM 12 76 SE Telemetry Unit Firmware version 1 10 built 10 06 ss 12 76 Setup Menu 0 Set time and date 1 Set local address 2 Set remote address 3 Set poll time 4 Set comms failure timeout 5 Set plug in board incl Busy phase amp Lead in delay for modem 6 Set low battery Set debounce times of DIG IN Set thresholds of ANA IN Exit setup mode N Please select a menu point 0 9 to edit it Press the relevant number to change the settings as described below Date and time
5. 12 76 0000 TELEMETRY UNIT USER S MANUAL SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 SALCOM 12 76 0000 2 1 Connections TELEM ETRY UNIT RS 232 Connector D9 Female This is a standard RS 232 socket wired DCE Connection to a PC computer is achieved using a standard straight through serial cable 1 DESCRIPTION da k a ba The 12 76 offers 8 digital and 8 analog variable inputs with 8 digital and 2 analog outputs While hee oss it has hundreds of applications it is primarily used in low level SCADA systems building Pin 5 RXD monitoring and security irrigation and pumping control sewerage industrial and agricultural Pin 4 N C systems The 12 76 operates over conventional radio systems data circuits cellular or voice PinS n Ground grade landline circuits depending on options as below Pin6 ow N C Pin7 eee N C Pin8 on N C The 12 76 is a versatile telemetry module It has one dedicated serial port provided for connection Pin 9 NIC to external equipment at RS232 levels In addition to this there is provision to plug in a range of modules providing compatibility with a range of communications devices Option 1 Internal Modem D15 Female a Pints sear GND Option 1 The Modem module allows direct connection to all SALCOM Radios and may be Pind RX Audio input from receiver connected to other brands so long as suitable AUDIO IN AUDI
6. 30235 100404560876 1023037540371255128 lt cr gt Unit 01 receives its status and recognises that it is an acknowledge and does not reply to prevent lockup 6 2 The command set for Network PC Mode is as follows In network mode the 12 76 units respond to shorter commands ie activate relay 1 or set analogue output 1 to 3 2 Volts Query remote only with no changes 1FF0000 lt gt or lt gt where FF address of remote 01 FF Hex Set a voltage level on remote Analogue output 1 amp FFAAAA lt cr gt where FF address of remote 01 FF Hex where AAAA value to pass to DAC 0000 1023 00 0 volts 512 2 5 volts 1023 5 volts Set a voltage level on remote Analogue output 2 FFAAAA lt cr gt where FF address of remote 01 FF Hex where AAAA value to pass to DAC 0000 1023 00 0 volts 512 2 5 volts 1023 5 volts Sea Air and Land Communications Ltd Page 11 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 Clear a remote digital output FF0007 lt cr gt where FF address of remote 01 FF Hex where 7 bit to clear 0 7 Set a remote digital output FF0007 lt cr gt where FF address of remote 01 FF Hex where 7 bit to set 0 7 Clear a remote digital output BYTE FF0022 lt cr gt where FF address of remote 01 FF Hex where 22 byte to clear 6 3 Acknowledge packet On receipt of a valid command from the PC or another 12 76 the un
7. 6 Sea Air and Land Communications Ltd Page 9 Issue 1276UD 1106 Low Battery Enabling low battery will make the unit close the contacts on digital output 8 when the supply voltage falls below 11 2 volts Digital output 8 contacts will be opened when the supply voltage is restored to above 11 2 volts When using this feature do not use digital input 8 on remote unit Set De Bounce times of Digital In Each input has a configurable debounce timer selecting option 7 displays the following menu Current debounce times for digital inputs DIG IN DIG IN 1 200ms DIG IN 2 200ms DIG IN 3 200ms DIG IN 4 200ms DIG IN 5 200ms DIG IN 6 200ms DIG IN 7 200ms DIG IN 8 200ms Press 1 8 to edit the debounce time of one of the inputs or just press ENTER to keep the current values and return to the main menu Selecting an input allows the debounce to be set to suit Current debounce time of DIG IN 1 is 200ms Enter the NEW value for the debounce time of DIG IN 1 The value can be from 0 to 25500 Oms to 25 5sec in 100ms STEPS Set Thresholds of Analogue In This determines how much of a change in voltage on an analogue input is required to initiate a transmission The value is entered as a percentage of the full scale of the analogue input Current thresholds for analog inputs ANA IN ANA IN 1 10 ANA IN 2 10 ANA IN 3 10 ANA IN 4 10 ANA IN 5 10 ANA IN 6 10 ANA IN 7 10 ANA IN 8 10 Press 1 8 to
8. O OUT PTT and Pj i N n3 _ TX Audio Audio to Transmitter BUSY connection points are available Pin 4 NIC Option 2 The serial module provides an additional serial port to RS232 specifications Pin5 PTT O C to ground 300mA with diode spike protection Option 3 The spread spectrum radio module provides UHF communication between 12 76 Pin6 aan N C units or other compatible devices without the need for an external radio device Pin7 oaa Busy input from Mute low to enable needs pullup to disable Option 4 A Salcom 12 18 five tone encoder decoder can be used to control inputs from radio Pin8 N C networks using five tone sequential signalling Pin9 an N C Pin1O N C The digital and analog I O ports are controlled via a central processing unit that also provides a 11 Balanced audio in out for connection to rugged electrical interface to a radio or landline circuit Pint2 Ainin Balanced audio in out cable T P LDC Pin13 _ N C TYPICAL APPLICATIONS N C 15 _ N C 1 1 Back to back A typical application for the 12 76 is to operate in a master slave configuration for point to point systems Option 2 RS 232 Connector D9 Male 1 2 Point to multipoint in Network Mode For multiple outstation systems multiple slave units Pini an N C report back to a central location where control system software provides the base supervisor Pin 2 RXD with a modern computer
9. edit the threshold of one of the inputs or just press ENTER to keep the current values and return to the main menu SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 Factory defaults Inputs 1 and 2 are set to a 5V scale inputs 3 to 8 are set to a 20V scale The default analog input change to trigger the 12 76 to volunteer its status when used in the back to back mode is 10 of full scale Setting the A to D TX span to 10 will mean that a change in voltage of 10 of the full span voltage 0 5 V for inputs 1 or 2 and 2V for inputs 3 to 8 will initiate a transmission Setting the A to D TX span to 0 prevents the unit from initiating a transmission on a change of status on an analogue input Some examples follow Ato D TX Span 5V Input 1 or 20V Input 3 to 8 5 1 9 Exit setup and run After setting the values to those required press 9 and the unit will send System Active and the AUX led will start to flash at 1 second intervals This indicates normal operation PROTOCOL AND COMMAND SET The 12 76 communicates using readable ASCII characters These are invisible to the user in back to back mode as the units converse directly over the radio or wire link However all commands which are received or sent by the 12 76 are echoed out the serial port at 9600 N 8 1 for diagnostic purposes When used back to back the 12 76 will volunteer its status whenever a digital input changes state or whenever an analogue input changes b
10. it will reply with the following DDSSAAABBB1 1 112222333344445555666677778888XXXXYYYYSS lt cr gt Description of the 12 76 response string Character Start Character shows it is an acknowledge packet does not require an acknowledgement Characters DD Destination address 01 FF Hex Characters SS Source address 01 FF Characters AAA Decimal representation of the input byte at the remote 000 255 Characters BBB Decimal representation of the output byte at the remote 000 255 Sea Air and Land Communications Ltd Page 12 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 Characters 1111 8888 Decimal representation of remote analogue inputs 1 8 10 bit 0000 123 Characters XXXX Decimal representation of the 8 bit D to A register for remote analogue Output 1 0000 1023 equ 0 5 volts Characters YYYY Decimal representation of the 8 bit D to A register for remote analogue Out put 2 0000 1023 equ 0 5 volts SS Checksum of the data packet lt gt Carriage return character ASCII 13 7 SPECIFICATIONS Inputs amp Outputs 8 Digital Inputs 8 Digital Outputs 1 Amp 24 volts DC up to 20 volts 8 Analog Inputs adjustable 0 to 2 5 volt or 0 to 25 volt 2 Analog Outputs 4 to 20 mA driver available Salcom 12 14 Signalling See SIGNALLING MODULES AVAILABLE below Current drain 13 2 volts 50 mA per active relay 30 mA per active input 3 mA Custom Applications 32 Kil
11. obytes of non volatile FRAM of which 20 Kilobytes are available for custom applications 193 mm x 113 mm x 50 mm SIGNALLING MODULES AVAILABLE Salcom 12 76 1000 Additional RS232 serial port module 12 76 2000 Modem Module AFSK 1200 baud 36 40 0922 922 MHz Spread Spectrum decoder module 12 18 0000 5 Tone encoder decoder module 19 29 0000 C D M A Cellular modem 19 30 0000 G S M Cellular modem 19 31 3600 UHF transceiver modem 11 76 4000 1 O extender adds 40 mixed ports Sea Air and Land Communications Ltd Page 13 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 8 WARRANTY Our Products are warranted for a period of 12 months from date of purchase against faulty materials and workmanship Should any fault occur the unit should be returned to the vendor freight pre paid Please include a description of the fault to assist with prompt return Any unauthorized alterations or repairs will invalidate the warranty DISCLAIMER All information provided in this document is carefully prepared and offered in good faith as a guide in the installation use and servicing of our products Installers must ensure that the final installation operates satisfactorily within the relevant regulatory requirements We accept no responsibility for incorrect installation We reserve the right to change products specifications and installation data at any time without notice SEA AIR 8 LAND COMMUNICATIONS LTD PO Box 22 621 120 St Asaph Street Ch
12. ristchurch New Zealand Phone 03 379 2298 Fax 03 365 1580 Email info salcom co nz Visit us at www salcom co nz Sea Air and Land Communications Ltd Page 14 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 12 76 0000 TELEMETRY UNIT CONNECTIONS GND ANAIN 1 0 ANAIN 2 AUX IN 7 ANAIN3 ANA OUT 2 ANAIN 4 ANA OUT 1 ANAIN 5 AUX OUT3 ANAIN 6 AUX OUT 2 ANAIN7 AUX OUT 1 ANAIN 8 GND GND ZAN 7 11 12 JA 1ASVACAGVDE ETFi DIGI IN 1 ZAN w DIGI OUT 4 ga DIGI IN 2 i ISVACIN DIGI IN3 Ponty AAA DIGI OUT 2 0 DIGIIN4 Ls 7 1 12 pel DIGI IN 5 y DIGI OUT 3 BAR m Jg gt li 12 cae sAusvAcoevoc DIGI IN 7 E DIGI OUT 4 ZOD DIGI IN 8 ZTUK 12H La Ss e COUNT DIGI OUT5 GND lu ZT11K 12H Aa ie lo AUXIN 1 _ DIGI OUT 6 ZANY w 45 AUX IN 2 L 12 META 3 E DIGI OUT7 to AUX IN 4 24 lo AUXIN 5 hea DIGI OUT 8 is AUX IN 6 C SERIAL Location of optional PCB 1 Internal modem 2 Additional serial port 3 Onboard 900MHz radio Sea Air and Land Communications Ltd Page 15
13. te its state When the LED is illuminated the relay contacts are closed 3 3 ANALOG INPUTS Eight analog inputs are provided only two of which can be used in the back to back mode Up to 20 Volts may be applied to these inputs the associated trim pot is then adjusted to provide the required reading from the A to D converter 5 volts will provide a full scale reading on inputs 1 and 2 and 20 volts on inputs 3 to 8 will provide a full scale reading When used back to back with the analog outputs of another 12 76 only inputs 1 and 2 are used with a resolution of 10 bits 1024 steps 3 4 ANALOG OUTPUTS Two analog outputs are included When used with another 12 76 these reflect the state of inputs 1 and 2 on the remote unit POINT TO MULTIPOINT OR NETWORK MODE Several remote sited units may be controlled and monitored by a PC based software program Each remote unit is allocated a unique address 01 FF Hex Demonstration software is available which allows addressable access to each unit and provides a graphical display of the unit in question Network applications invariably require custom software For those qualified we can provide the source code of the demonstration software to assist with further development Analogue inputs 3 to 8 are intended for use with a PC based program These inputs are calibrated to achieve full span of the 10 bit ADC 0 1023 counts with an input of 20 volts The user may adjust these to any convenient value
14. ure is normally used with the Poll feature The time for a communications failure MUST be greater than the time set in the Poll When using this feature do not use digital input 7 on remote unit The communications failure timeout can be from 1 to 255 minutes Setting the timeout to 0 disables the feature on the unit Plug in Board There are three options for plug in board displayed by selecting option 5 as follows Current plug in board is RS 232 Serial board Enter 0 for RS 232 Serial board Enter 1 for 922MHz transceiver board Enter 2 for 1200Hz FSK Modem board or just press ENTER to keep the current board If the 1200Baud FSK Modem is selected then another option is available for setting the phase of the busy signal Current busy phase for the modem board is active LOW Enter H to set the busy phase to active HIGH Enter L to set the busy phase to active LOW or just press ENTER to keep the current busy phase NOTE If the busy phase is set to active low then the input signal from the radio must have a pull up resistor to force the input high when the mute busy is closed Once the busy phase is set the PTT Lead In Delay will need to be set this wil be displayed as below Current PTT Lead In delay is 200 ms Enter the new value in milliseconds from 0 to 2500 Oms to 2 5sec in 10ms STEPS or just press ENTER to keep the current value Sea Air and Land Communications Ltd Page 8 SALCOM 12 76 0000 Telemtery Unit 5 1
15. y a preset amount default is 10 of full scale see setup The information is sent as a packet of data containing the source and destination addresses and the state of all inputs and outputs not just the values that have changed The destination unit receives this and updates its outputs it then responds with an acknowledgment packet which also contains all information relating to the remote unit This ensures that whenever the two units converse all data is current Sea Air and Land Communications Ltd Page 10 SALCOM 12 76 0000 Telemtery Unit Issue 1276UD 1106 If the Poll value is set to a value greater than zero see set up a 12 76 will volunteer its status at preset intervals even if no changes occur A Poll value set to one will initiate an automatic poll every minute The time between polls can be set to a maximum of 255 minutes Generally one unit of a pair would be set to poll every minute or so the other unit would be set to zero no poll If nothing else this ensures that a dialog is initiated at switch on time and that the state of both units is known even if no changes occur immediately 6 1 The command set for Point to Point Mode is as follows When a unit sends its data in back to back mode the start character is a sign which allows the command to be recognised as requiring an acknowledgement Unit 01 sends to Unit 05 050100200108021004010010560000023408761001255128 lt cr gt Unit 05 replies 0105255002002
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