ssrt-09-rs422 ABACOM Technologies, Inc, ssrt-09-rs422 Datasheet - Page 2

• Manufacturer Part Number: ssrt-09-rs422
• Description: Spread Spectrum Rf Data Transceivers
• Manufacturer: ABACOM Technologies, Inc

The table below provides the RS-422 and RS-485 (full duplex) designation for the DB9 connector
The table below provides the RS-485 half duplex designation for the DB9 connector.
RS-422/RS-485 Line Termination
For installations that require 120 ohm line termination, install jumper J3
Power Supply Requirements
The SSRT-09-RS485 requires an external DC power supply with a fixed voltage rating above 7.5Vdc
and less than 18Vdc and with a current rating of at least 300mA. A typical power supply may be a
wall transformer (DC adapter) of 12Vdc, 300mA. The power supply connector must have center posi-
tive polarity.
The SSRT-09-RS485 may be powered either via the DC socket or via pins 5 (0V) and 9 (+V) of the
DB9 connector.
DB9 PIN #
DB9 PIN #
ABACOM Technologies, Inc.
1,4,8
1,4,8
2
3
6
7
5
9
2
3
5
9
RS-422 DESIGNATION
RS-485 DESIGNATION
Not Used
Not Used
TX+/RX+
TX-/RX-
GND
RX+
TX+
RX-
TX-
+V
GND
+V
•
383 Bering Ave • Etobicoke • ON • M8Z 3B1 • Tel [phone] • Fax [phone]
www.abacom-tech.com
One of two differential data
Transmission lines
One of two differential data
Transmission lines
One of two differential data
Transmission lines
One of two differential data
Transmission lines
Ground signal
7.5V-18Vdc Power supply Input
7.5V-18Vdc Power supply Input
DESCRIPTION
Differential data line
Differential data line
DESCRIPTION
Signal Ground
Serial data sent from module
Serial data sent to module
Ground
The SSRT may be powered
via pins 5 and 9 instead of via
the DC socket
The SSRT may be powered
via pins 5 and 9 instead of via
the DC socket
IMPLEMENTATION
Serial data sent to and re-
IMPLEMENTATION
ceived from the module
Ground