General Description of the Intelligent Digital Slave Transmitter - IDST

General Description

The IDST is a PROM programmable Digital Transmitter. It is the ideal reliable slave digital transmitter. The IDST has seven trip channels plus Low Battery.

Operating Features

The following explains in detail how the IDST works. You should read it before proceeding to install and program your new IDST. Programming instructions are contained in a separate document that should be studied in conjunction with these instructions.

  1. Tripping and Arming

    A. Trip Circuits. The IDST has 7 trip channels (A through D, plus E, F, and G) and Low Battery reporting. The IDST comes from the factory with all trip channels programmed for Normally Open Activation, but any channel can be programmed for Normally Closed (See Section III of Programming Information Form).

    B. Automatic Abort. Any of the trip channels (A through G) and Low Battery can be programmed to automatically abort (cancel the alarm message) if the trip condition is not continuously maintained up to the time the unit completes dialing/begins communicating with the receiver (Section IV of Programming Information Form). If the trip condition restores after the unit completes dialing/begins communicating, the message to the initial receiver will not be canceled. The automatic abort feature is useful for reducing false alarms due to inconsistent activation, especially on Low Battery reporting.
  2. Reporting

    A. Low Battery. When the battery voltage drops to below 10.5 volts, a Low Battery condition is identified. The separate Low Battery channel will automatically report a Low Battery condition; however, a diode on the ID circuit board can be cut to disable the Low Battery report. If using the Low Battery feature, you will probably want to program it for Automatic Abort to prevent sending a Low Battery report when the condition is only temporary.

    B. Restoral. All channels (A through G) and Low Battery can be programmed to report Restorals. (Section V in Programming Information Form).

    C. Dialer Delay. All trip channels and Low Battery have a built-in 10 millisecond delay to help eliminate transient tripping. An additional Dialer Delay of up to 60 seconds is programmable for trip channels A, B, C, and D on the IDST in four-second increments (Section VI of Programming Information Form). Trip channels E, F, and G and Low Battery have no programmable Dialer Delay capability. Dialer Delay is the time between when a channel trip occurs and when the unit begins the process of dialing, assuming the channel is not programmed for Automatic Abort. Delays are not normally used, but can be programmed for unusual circumstances.

    D. Dialing Capability. The IDST is factory programmed for pulse dialing, although it can be programmed for Touch-tone. Two 14-digit telephone numbers with up to 3 dial tone detects are possible (Section I and II of Programming Information Form). The IDST is programmable by channel (including Low Battery) to call receiver number 1 only. Attempts to call the receiver are factory set at 8 times; however, this can be programmed up to 14 times or "no limit" (Section VII of Programming Information Form).

    E. Receiver Format. The IDST will communicate with the AMR 10000 Receiver.

Installation Instructions

A "typical" installation is illustrated in Figure 1. Refer to this Figure regarding the following installation instructions.

  1. The IDST is typically shipped attached to a sub-plate ready for installation in the AMT-8 application. When used with the ID-8 Intelligent Dialer, this unit is mounted onto a plug-in circuit board and ready for installation.
  2. If Low Battery reporting is not desired, cut Diode D2 on the circuit board.
  3. When installing the system as a stand alone unit, connect the input trip circuits as follows: If using dry relay contacts from a control panel, use the "Trip Common" connections shown in Figure 1 to activate the desired channels. If you want to activate from a Normally Open contact, refer to the hook-up for channel A in Figure 1. If using a Normally Closed contact, refer to channel B in Diagram. If you want to activate directly from the voltage outputs of the control panel, use the hook-up shown for channels C and D in Figure 1.
  4. Connect DC power (12 Volt).
  5. Intelligent Digital Slave Transmitters are designed to directly connect to the telephone lines and are FCC registered as number AC9980-6337 1-AC-E, ringer equivalent 0.0B. The local telephone company should install a model RF31X jack, which connects to terminals 4, 5, 6, and 7 as shown in Figure 1 with an RF31X cord and modular plug set. This wiring assures proper line seizure and disconnects the local telephones during an alarm condition to assure a proper dialer transmission.
  6. To secure a dial tone on ground-start telephone systems, solder a 1000 ohm resistor on the bottom of the circuit board as in Figure 2, and ground the negative terminal of the dialing power supply to earth ground. If the dialer does not obtain a dial tone after the resistor is added, reverse the connections to terminals "T" and "R" and retest.

NOTE: For lightning protection function, the "Earth Terminal" must be connected to an Earth ground.

Programming

Once you have completed the electrical connections described above, you must program and insert a PROM. (One is supplied with the unit.) It is necessary to custom program this PROM prior to installation in the unit

Programmers are available for sale.

Troubleshooting

The following equipment is required to properly troubleshoot the IDST.

  1. Volt/Ohm meter
  2. Test PROM (known good one)
  3. Spare transmitter (known good one)
  4. Telephone lineman handset

If the unit fails to operate properly, the following steps should be performed.

  1. Disconnect all wires connected to the transmitter.
  2. Examine the PC board for burned or discolored components or PC board lines. To protect against a direct short or reversed voltage connection, a fuse-link is etched into the circuit board. In case of accidental reversed-voltage or shorting during installation, this fuse-link may open. If it opens, the leads of a fuse holder can be connected to the solder pads on each side of the fuse-link, or a shorting strap can be applied (SEE Figure 2). If a shorting strap is applied, extreme care must be taken thereafter to avoid a reversed-voltage connection or short to the dialer, since there is no longer any fuse protection.
  3. Measure the power supply voltage, it should be 11-13.85 VDC.
  4. Reconnect all wires and measure the voltage again, but this time at the transmitter. The voltage should be the same as in step 3. If it is not, substitute the known good transmitter. If the voltage is correct, then the transmitter is defective.

SYMPTOM: Unit fails to trigger

  1. Measure voltage between the trip common and the power supply negative terminal. This voltage should be 11-13.85 VDC. If it is not, the transmitter is defective.
  2. Trip channel A with a voltage by connecting it to the trip common terminal with a piece of wire. Make sure good contact is made.
  3. Make sure that the PROM is inserted properly. If you are not sure of the proper PROM insertion, remove the PROM and trip as in #2 above. The unit should activate but not dial with the PROM removed. You can tell when the unit activates by listening for the relay to click.
  4. Check the PROM programming. Remember, if a Dialer Delay has been programmed, the unit will not operate until the delay time has expires.

SYMPTOM: Unit activates, but does not dial.

  1. Check the RJ31X jack connections with a telephone handset to confirm that a telephone line exists.
  2. Insert a test PROM, activate the unit. If it then dials, the original PROM is either defective or incorrectly programmed.
  3. Connect the lineman's handset to the T and R terminals on the transmitter. Put the handset in the monitor mode, and listen for noise on the line. Let the handset seize the line and verify that there is a loud enough dial tone.

SYMPTOM: Unit activates, dials central station, but does not transmit data, or data is erratic.

  1. Make sure that the PROM is programmed for the proper receiver.
  2. Monitor the line with the lineman's handset and verify that the handshake is received.
  3. Determine that the account numbers are programmed into the proper location on the PROM.

SYMPTOM: Unit activates independently, but not from the control panel.

  1. If the unit is a stand alone unit, powered by another power supply, be sure that the negative terminals of the power supply and IDST are connected together.
  2. Connect a VOM from the trip common terminal and the negative on the control. This voltage should be at least 3 volts or more.

Specifications

Updated 3/98

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