6

6

DS Storm-b May 08

©2008 Reg. No. 227 4001, ENGLAND

Page 2

Connections and Set-up

USB Connector

The Storm Modem interfaces to the host computer via a USB Type A connector.

RS232 Connector

The RF Modem interfaces to the host computer via an RS232 connection using a standard DB9 connector

with pin out as shown in the diagram below.

Power supply

For USB comms, power is automatically obtained from the USB connection. (No external power

required)

For RS232 comms external power is required. Power is provided by either J6 (as shown above) or by a

special serial cable RFS part number PSU-M433UK

The PSU-M433UK power supply and serial cable supplies pin 9 of the 9 way Sub D connector with 12

Volts DC.

Serial Data

Data Bits:

8

Parity:

None

Stop Bits:

1

Flow Control:

None

OPT 1

OPT 2

Host

Baud Rate

Open

Open

4,800

Open

Fitted

9,600

Fitted

Open

19,200

Fitted

Fitted

38,400

(Factory Setting 19,200Kbps)

Status LED’s

The RF Modem circuit board has three LED’s, representing the following signals:

•

PWR – Power on

•

Tx – Transmitting data

•

Rx – Receiving data

8

3

2

20

7

6

4

5

22

1

2

3

4

5

6

7

8

9

PC Serial Port

DTE

(DB25)

RF STORM M odem

(DB9F)

Tx

Rx

DTR

GND

RTS

CTS

1

2

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

9

PC Serial Port

DTE

(DB9)

RF STORM M odem

(DB9F)

Tx

Rx

DTR

GND

RTS

CTS

POWER

POWER