Compaq MTEK6000 RS-232C Serial Direct Communications 9600 Baud, Connecting the Telephone Line

MTEK6000 SERIES USER'S MANUAL

COMMUNICATIONS

To communicate with the MTEK6000, the Site ID (RUID) in the device must be the same as the Site ID entered in the software package. The Site ID is a unique identification number (1 to 65,535) that allows the Metretek, Inc. software packages to communicate with the MTEK6000. The default Site ID number is 1. Software can be used to enter a number other than the default. Refer to the respective software User’s Manual for additional information on these and other functions. The optional external display and keypad can also be used to change the Site ID from its default value.

RS-232C Serial (Direct) Communications (9600 Baud)

In its standard configuration, the MTEK6000 is equipped with one RS-232C serial port. An optional RS-232C serial cable (Part # 1002-0235C-001) is required for direct communications. The serial port allows an operator to configure and collect data with an industry-standard (IBM, Compaq, etc.) portable computer (software is required for

this function). The MTEK6000 communicates at 9600 baud with portable or host computers connected directly to the serial port. When communicating with the MTEK6000, Busy will be displayed on the display. Table 2-2 shows the diagnostic features of the Activity indicator when the cable is connected.

WARNING

The MTEK6000 will not go to sleep if the RS-232C serial cable is left connected and battery life will be affected drastically.

Modem Communications (2400 Baud)

NOTE

This modem complies with Part 68 of the FCC Rules. See Appendix E for details.

The internal Hayes compatible modem offers automatic answering and dialing. The modem communicates at 2400/1200/300 baud. The modem by itself can only be used in areas classified as non-hazardous or Class I, Division 2. To maintain the MTEK6000’s intrinsic safety classification in more hazardous areas such as Class I, Division 1, an optional Phone Line Interface (PLI) must be used. This device removes the high voltage ring-detect circuitry from the device and brings low-level signals into the hazardous area through intrinsic safety barriers.

Connecting the Telephone Line

If the MTEK6000 is situated in a non- hazardous or Class I, Division 2 area, connect the tip and ring wires from the telephone company's terminal box to the TIP and RING terminals (1 and 2 respectively).

If it is installed in a Class I, Division 1, Group D area, install the unit per the reference drawing shown Appendix E. Also see Appendix D for proper jumper settings.

Installation of the phone line surge protection device provided with the MTEK6000 is strongly recommended when the MTEK6000s internal modem is connected to a telephone line. The device is a separate gas tube type phone line surge suppressor and is housed in its own enclosure suitable for mounting directly to a telephone pole or other structure.

2-12 January 2002