Young 26764 Instruction Sheet

MODEL 26764
2.4 GHz SPREAD SPECTRUM RF MODEM with ANTENNA
SPECIFICATION SUMMARY
Range Indoor/Urban – Up to 91 m (300')
Outdoor Line of Sight – 1.6 km (1 mi)
Serial 1200 – 115200 baud (9600 default)
RS-232 / RS-422 / RS-485
(RS-485 default)
Power 10-48 VDC, 2 W max
Case 8.4 cm x 11.9 cm x 3 cm
(3.3" x 4.7" x 1.2")
Environmental: Temp
RH
OPERATION
Model 26764 Wireless Radio Modems provide a reliable wireless
link between devices using serial communication. The modem may
be configured for RS-422 or RS-485 (RS-232 is always active at the
DB-9 Connector). An articulated monopole antenna allows installation
indoors or in a weatherproof non conductive enclosure.
The 26764 modems may be configured as one or more pairs for a
wireless serial communication link between devices that would
otherwise be connected by wire(s).
Proper operation requires the correct power supply, DIP switch
settings, modem parameter settings, cable connections, antenna
placement, and serial device parameter settings. Confirm bench top
operation before installation.
POWER SUPPLY
In YOUNG installations, the 26764 is typically wired to share power
with other devices. If a separate power supply is used, observe the
specifications listed above.
R. M. YOUNG COMPANY
-40° to 85° C
10 to 90%
2801 Aero Park Drive , Traverse City, Michigan 49686 USA
TEL (231) 946-3980
INSTRUCTION SHEET 26764-90
DIP SWITCHES
The DIP switches determine the RS-422 or RS-485 connection
configuration. Configure as illustrated below.
Power must be removed and restored for new DIP settings to take
effect. See the section below for details on RS-485 2-wire and 4-wire
connections.
WIRING INFORMATION
All YOUNG serial devices operate without hardware handshaking.
Therefore, the only connections required are Signal Ground, Transmit
(TX), and Receive (RX). TX and RX are single wire connections
for RS-232. They may be configured for 2-wire or 4-wire for
RS-485. Correct cable connections are shown below.
(Note: The DB-9 connector is RS-232 only and is always active.)
RS-232
DB9F
Pin #
RS-485
(2 Wire)
FAX (231) 946-4772
REV B031418
Signal Name Direction
1 Data Carrier Detect*
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Signal Ground
6 Data Set Ready*
7 Request To Send
8 Clear To Send
9 Not used
* - Pins 1 & 6 are not used.
They are tied together
RS-422 / 485
(4 Wire)
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