Secutron MR-2900 Installation Manual page 8

Communication Ports
The Control Unit has 6 communication ports available:
• Port #1- network (Proprietary)
• Port #2- network (Proprietary)
• Port #3- general purpose (Proprietary)
• Port #4- service terminal (RS232 - DB9)
• Port #5- printer interface, Parallel (IBM/Centronics - DB25)
• Port #6- serial printer interface (RS-232)
Ports 1 to 3 use the terminal strip on the Terminal Board for connection. Ports 4 and 5 use the connectors
mounted on the bottom of the Main Circuit Board. Port 6 uses a connector on the top of the Terminal
Board. It is for the optional factory installed MR-2920 strip printer.
The system network ports, Ports 1 and 2, allow for the networking of units. Up to 40 units (Control and/or
Annunciator) can be networked together. The network wiring is a Style 7 (DCLR) loop layout. An MR-2910
Series Network Board is required by each Control Unit to use these ports.
Port 3 is available for different uses depending upon the operating program loaded in the panel. Different
uses require different variants of the operating program. Typical uses are a central station connection or
remote LED annunciation of system status. The operation of this port is software defined and requires the
use of an MR-2109-x communications board. The MR-2109-3 Driver is for communication to MR-2614,
MR-2644, and the following dialers MR-2900-DACT and MRDL. The MR-2109-4 Driver is for
communication to the MV-2700 voice system.
The service terminal port, Port 4, permits the downloading and uploading of custom software, such as
device messages and I/O functions. It is intended for temporary connection to provide supplementary
information during servicing of the panel.
The parallel printer port, Port 5, connects to any standard parallel printer. The system prints every
occurrence as it happens. It is intended for temporary connection and can be used for system
commissioning and testing by producing a printed log of received events. This can then be checked
against a log of tests performed to confirm operation.
The serial printer interface, Port 6, is for the optional factory installed strip printer.
Note: If either of the printers or the service terminal printer screen is stalled, it causes the other printers
to stall.
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