724-746-5500 | blackbox.com
Page 11
Chapter 2: Overview
To download this user manual from our Web site:
1. Go to www.blackbox.com
2. Enter the part number (MDR100A-R5 or MDR112A-R5) in the search box:
3. Click on the “Resources” tab on the product page, and select the document you wish to download.
If you have any trouble accessing the Black Box site to download the manual, you can contact our Technical Support
at 724-746-5500 or [email protected].
2.4 Hardware Description
The MDR100A-R5 or MDR112A-R5 provides a fully enclosed, standalone modem, requiring only cabled connections. The
MDR100A-R5 or MDR112A-R5 can be used on a table top surface or mounted on a flat surface or a wall using the mounting
holes.
A pair of the Industrial 900-MHz Wireless Modems are shown in Figure 2-1. On the front of the unit is the DIAGNOSTIC port,
CONFIG Button, and the RSSI, TX and RX LEDs. The RX and RSSI LEDs on the unit on the right are lit green to indicate that the
unit is receiving data. The components are described in Table 2-1. The TX LED on the unit on the left is lit red to indicate that it is
transmitting data.
1 2 3 4
1 2 3 5
Figure 2-1. Front panel.
Table 2-1. Modem components.
Number in Figure 2-1
Component
.
Description
1
DB9 connector
The diagnostic port (RS-232) is used for two purposes:
• Online diagnostics and configuration at 115.2 kbps.
• Firmware upgrades.
2
CONFIG Button
Press and hold this button while powering-up the modem to boot the unit
into configuration mode: the default serial interface (rear DB9, RS-232) will be
active and set to operate at its default serial baud rate of 9600 bps.
3
(3)
Receive Signal
Strength Indicator
(RSSI) (3x Green)
As the received signal strength increases, starting with the furthest left, the
number of active RSSI LEDs increases. Signal strength is calculated based on
the last four valid received packets with correct CRC. RSSI is also reported in
S123.
4
TX LED (Red)
When lit, this LED indicates that the modem is transmitting data over the air.
5
RX/SYNC LED
(Green)
When lit, this LED indicates that the modem is synchronized and has received
valid packets.
NOTE: There is also a Power LED below the TX and RX LEDs.
