Table of Contents
Advertisement
RS‐232/485 RF Modem Product Manual – MAN0782‐02
RS-232/485 Interface
Figure 1.1. Front View
1.1c. Serial Port
1.1d. RSSI LEDs
1.1b. I/O LEDs
1.1e. Power Connector *
1.1a. Config Switch
* Note: The RS‐232‐485 RF Modem can
accept voltages as low as 5 (±5%) V.
Contact Horner technical support to
implement this option.
Figure 1.2. Back View
2a. DIP Switch
2b. Antenna Port
Figure 1.3. DIP Switch Settings
1.1a. Config (Configuration) Switch
The Configuration Switch provides an alternate method for
entering into Command Mode. To enter Command Mode at the
default RF data rate of the RF modem, depress the Config
Switch for two seconds.
1.1b. I/O LEDs
LEDs indicate modem activity as follows:
Yellow (top LED) = RX
Green (middle)
= TX
Red (bottom)
= Power/TX Indicator (Red light is on when
powered, pulses off briefly during RF transmission)
1.1c. Serial Port (DB-9)
Standard female DB-9 (RS-232) DCE connector – Connector can be
also used for RS-485 and RS-422 connections.
1.1d. RSSI LEDs
RSSI LEDs indicate the amount of fade margin present in an active
wireless link. Fade margin is the difference between the incoming
signal strength and the modem's receiver sensitivity.
3 LEDs on = Very Strong Signal (> 30 dB fade margin)
2 LEDs on = Strong Signal (> 20 dB fade margin)
1 LED on = Moderate Signal (> 10 dB fade margin)
0 LED on = Weak Signal (< 10 dB fade margin)
1.1e. Power Connector *
7-28 VDC Power Connector (Center positive, 5.5/2.1mm)
1.2a. DIP Switch
During the power-on sequence, the DIP Switch automatically
configures the RS-232/485 RF Modem to operate in different
modes. Each time the RF modem is powered-on, intelligence inside
the RS-232/485 RF Modem programs the modem according to the
positions of the DIP Switch. [Refer to Figure 1.3 for DIP Switch
settings.]
Refer to Automatic DIP Switch Configurations [p29] for more info.
1.2b. Antenna Port
Port is a 50Ω RF signal connector for connecting to an external
antenna. The connector type is RPSMA (Reverse Polarity SMA)
female. The connector has threads on the outside of a barrel and a
male center conductor.
Page 9
Advertisement
Table of Contents
