Pacific Research Solutions PET-820 User Manual
Page 10
Pacific Research
PET-820 User Manual
Page 9
2.2.1
ANALOG INPUT OPTION START UP PROCEDURE
The following is a start up procedure for the PET-820's Analog option. Default password, key code, and Program
Authorization Codes are used in the following examples. Refer to figure 6.2 for detailed electrical hook up diagram for the
analog option. If this section does not apply, go to section 2.3 of the manual.
1.
Follow the bench testing procedures located in SECTION 2.2 before going any further within the following section.
2.
Turn off power to the PET-820 before disassembly and hook up.
3.
Remove the 4 screws from the upper panel and remove the panel. Under this panel is the location of the analog input
board and its terminals.
4.
Using some hook up wire, connect channel 1 of the analog input to an adjustable power source. The channel 1 high
side is terminal 1 of the analog board and ground or return is terminal 2.
5.
Turn on the power and adjust your power source for a known voltage less than 4.095 volts. You can check this
voltage at the terminal of channel 1 input. Establish communication with the PET-820 and send the units password
if required. Now send 631#, the PET-820 will read back the current voltage at this input, in volts.
6.
Review the programming section of this manual to get familiar with all of the characteristics prior to making any
changes in the units operation.
2.3
ESTABLISHING COMMUNICATION
The following are three different methods for establishing communication with the PET-820. These methods vary due to the
type of communication interface that you may used. Review each method to determine which applies to your condition and
also understand how the other methods work, as they may apply in future applications.
1.
If the PET-820 is connected to a standard telephone line or PBX and a second line or station extension is available to
communicate with the system, Dial the telephone number at which the PET-820 is connected to. After 4 rings the
unit should answer the call with a sign on message "P E T Eight Twenty" or the Time and Date if the real time
clock option has been included. Before you can continue further, you must now enter the password. The default
password is 60321# the read back telemetry should then say
"Pass O K". You now are ready to send control commands to the PET-820. Refer to paragraph 2.4 for continued
operation.
2.
If the keypad display option included with your PET-820, you will immediately be ready to send control commands
without entering a password. You should continue to section 2.4 of the manual.
3.
If the PET-820 is connected to the simulated telephone test circuit as described in "APPENDIX D" of the manual.
Then, in order to establish communication in this configuration, pick up the telephone receiver that is connected to
the simulated interface and enter the password 60321#. The PET-820 should then respond with the sign on message
"P E T Eight Twenty" or the time and date if the real time clock option has been included. Once this
communication has been established you may continue with section 2.4 of this manual.