Adeunis RF ARF7474 User manual

A
RF53
Data modem
900-928MHz version
User Guide

No part of this document may be reproduced or transmitted (in electronic or
paper version, photocopy) without Adeunis RF consent.
This document is subject to change without notice.
All trademarks mentioned in this guide are the property of their respective
owner.
ADEUNIS RF
283, rue Louis Néel
38920 Crolles
France
Phone [phone]
Fax [phone]
Ref. 12-07-V7-ffr

A
RF53
User Guide
Ref. 12-07-V7-FFR p 1
Table of Contents
Table of Contents .............................................................................. 1
About this document......................................................................... 2
Compliance to FCC US/CAN .............................................................. 3
Antennas requirements .........................................................3
Overview........................................................................................... 4
Product Power supply ....................................................................... 4
Serial link wiring ............................................................................... 5
MODEM / DTE RS232............................................................5
DCE RS232 ..........................................................................6
RS485 wiring........................................................................7
Radio communication ....................................................................... 9
Radio channels & Sub-bands ............................................... 10
Channel selection ............................................................... 11
Air radio rate selection ........................................................ 11
Channel rejection ............................................................... 11
RSSI reading...................................................................... 12
Transceiver operating mode ...........................................................12
Command mode................................................................. 13
Transceiver state machine................................................... 14
AT Commands .................................................................................15
Description ........................................................................ 15
Set of commands ............................................................... 15
Register description ............................................................ 17
Specifications..................................................................................21
General technical charactéristics .......................................... 21
Transmitter........................................................................ 21
Receiver ............................................................................ 21
Protocol............................................................................. 22
Glossary ..........................................................................................23
ANNEX : Firmware updates............................................................. 23

A
RF53
User Guide
Ref. 12-07-V7-FFR p 2
About this document
This guide describes the A
RF53
devices, their options and accessories.

A
RF53
User Guide
Ref. 12-07-V7-FFR p 3
Compliance to FCC US/CAN
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures :
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY ADEUNIS RF
COULD VOID THE USER‟S AUTHORITY TO OPERATE THE EQUIPMENT.
RF Exposure Warning: During operation, the user may keep a minimum
separation distance of 50 cm with the RF devices.
Antennas requirements
PROCOM ELF 900/915MHz-TNC 5 dBi (Ref: ARF7482A)
LAIRD TECHNOLOGIES FG9026 6dBd (Ref : ARF7482B)
LAIRD TECHNOLOGIES FG9023 3dBd (Ref: ARF7482C)

A
RF53
User Guide
Ref. 12-07-V7-FFR p 4
Overview
The modem converts data from a serial link into a radio frame to be
sent to a similar piece of equipment.
The operating parameters of these modems (serial link, radio
management…) can be updated through commands on the serial
link.
The products are available either in card version to be integrated in
an assembly or as an IP65 chip. In the IP65 case, the products are
fixed with the fixing lugs onto the top (antenna) and bottom (stuffing
box) of the casing (4 screws not provided).
Product Power supply
To perform wiring of these products, the bottom part of the housing
(part with stuffing box) has to be opened by unscrewing the two
stainless steel screws on each side.
RS232 serial link
Radio transmission

A
RF53
User Guide
Ref. 12-07-V7-FFR p 5
Retirer les vis de la partie
avec presse étoupe
Remove these screws
The ARF53 range products are supplied from a DC voltage source. This
voltage source must be 4,5V minimum and must not exceed 36 Vdc. Green
LED is ON when powered.
EASY CHECK
Green LED is ON when modem is
powered.
Serial link wiring
MODEM / DTE RS232
This is for example the case of a modem connected to a PC. RTS and
CTS are required only if flow control is used.
+DC Supply.
+
-
RX
TX
ON
RTS
CTS
TX+
TX-
RX+
RX-
ON
1 2

A
RF53
User Guide
Ref. 12-07-V7-FFR p 6
N° / SUB-D 9
NOM
+ Vcc
5
GND
2
RXD
3
TXD
+
-
RX
TX
RTS
CTS
TX+
TX-
RX+
RX-
ON
1 2
7
5
RTS
5
8
CTS
DCE RS232
This is for example the case of a modem connected to a measuring
device. RTS and CTS are required only if flow control is used.
N° / SUB-D 9
NOM
+ Vcc
5
GND
3
RXD
2
TXD
+
-
RX
TX
INHIB
RTS
CTS
TX+
TX-
RX+
RX-
ON
1 2
8
RTS
7
CTS
EASY CHECK
Serial link activity will make the green LED flashing, whatever the
selected data rate is right or wrong.

A
RF53
User Guide
Ref. 12-07-V7-FFR p 7
RS485 wiring
The RS485 bus wiring needs only two wires (TX+ is connected to RX+ and
TX- is connected to RX- on the PCB)
BUS RS485
NAME
+ Vcc
GND
A
TX+/RX+
B
TX-/ RX-
+
-
RX
TX
INHIB
RTS
CTS
TX+
TX-
RX+
RX-
Connect only TX-
or RX- (note 1)
Connect only TX+
or RX+ (note 1)
Note 1:
TX- is connected to RX- on the PCB
TX+ is connected to RX+ on the PCB
ON
1 2
Figure 1: RS485 wiring
In order to activate the RS485 management the SW1.1 switch MUST be ON
and the S215 value MUST be 1 (see the following table).
WARNING
the SW1.1 switch is read only at the power-up. Changing the SW1.1 switch
when the modem is already running will not be taken in account.
Table 1: R485/232 configuration settings
S215 values
SW1.1
Note
1
ON
RS485 control lines management
1
OFF
RS232 configuration
0
ignoré
RS232 configuration

A
RF53
User Guide
Ref. 12-07-V7-FFR p 8
By default the DE and RE lines are asserted LOW, allowing receiving
character from the RS485 differential bus. The DE and RE lines are asserted
HIGH only when one or several characters have to be transmitted over the
RS485 differential bus: when a radio frame is demodulated, the lines are
asserted HIGH and then the data extracted from the radio frame are sent to
the module TXD line and therefore to the RS485 differential bus. When the
last character has been transmitted over the RS485 differential bus, the lines
are asserted LOW.
Figure 2 : DE/RE timing when data are sent over the serial link
Threshold: minimum = 1 µs
Tde: set according to the S219 register value (see table hereafter)
S219
0
1
2
3
4
5
10
20
40
60
80
Tde
min
15
µs
35
µs
65
µs
135
µs
150
µs
190
µs
330
µs
600
µs
1,1
ms
1,7
ms
2,3
ms
In command mode, a reply is sent back (on the TXD line) according to the
following DE/RE timing:
The RS485 link needs to be adapted (each side). The modem includes a
100termination resistor:
SW1.2 = ON, the resistor is connected between A and B (respectively RX+
and RX-)
SW1.2 = OFF, the resistor is not connected between A and B.
If the modem is ending the RS485 bus, SW1.1 must be ON.