232C-868FR1

RS232 RADIO MODEM • • • • • • • • • • • • • • RS-232 Compatible Selectable Baud Rate 1200bps – 38.4Kbps Range up to 800 Metres European Operation 868MHz RF Power 0-7 dBm Network Configurable Transparent or Data verified communications modes 4 User Configurable Digital I/O Channels Standard Hayes Command Set Internal LED indication of Power and Data TX & RX 12Vdc Power Supply Conforms to ETSI 300-220 Requires no radio licence to operate Tough ABS enclosure 232C-868FR1 Description The R.F. Solutions 232C-868FR1 radio modem provides fast and reliable RF data communications at an exceptionally competitive price. Whilst the RF modem is simple to use it is also highly adaptable and can be used in a wide variety of applications. The modems can be configured for various operating modes to provide: 1. An ‘invisible’ RS232 point to point link, reproducing the function of a half duplex RS232 cable. 2. A RS232 point to point link with data flow control to provide data verification. 3. A functionality similar to that of a client/server network, where each modem is assigned an address with a maximum of 255 clients per network and a maximum of 65535 networks. 4. Point to point data transfer for up to four digital I/O signals with continuous resend and automatic data acknowledgement. The modem is supplied in a tough ABS enclosure, with wall mounting lugs. The external 868MHz antenna offers a range of up to 600 metres line of sight. The modem is supplied with an RS232 cable and requires only a 9-12Vdc power supply. DS232-4 June ’04 ©2004 Reg. No. 227 4001, ENGLAND Page 1 RS232 RADIO MODEM Contents 232C-868FR1 1 Technical Specifications ................................................................................. 3 1.1 1.2 1.3 1.4 1.5 Functional description ............................................................................... 3 Status LED’s ............................................................................................. 3 Connections .............................................................................................. 3 Electrical Characteristics........................................................................... 4 Temperature Range and Dimensions ....................................................... 4 Operating modes ...................................................................................... 5 Quick Setup Guide.................................................................................... 8 Hayes or ‘AT’ Mode .................................................................................. 9 Standard commands description............................................................... 9 Radio Test Commands ........................................................................... 10 Registers description .............................................................................. 10 2 Software Specifications................................................................................... 5 2.1 2.2 2.3 2.4 2.5 2.6 3 Ordering Information ..................................................................................... 12 DS232-4 June ’04 ©2004 Reg. No. 227 4001, ENGLAND Page 2 RS232 RADIO MODEM 1 Technical Specifications 232C-868FR1 1.1 Functional description The RF modem is software configurable using the standard AT command set. Commands can be entered via the RS232 port using a control device with communications software (for example a PC with windows HyperTerminal). Using this method the modem can be set to four different modes. In transparent mode the modem provides an ‘invisible’ serial link and reproduces the function of a half duplex RS-232 cable. Transparent secured mode operates in the same manner of transparent mode and also provides data flow control to ensure the correctness of transmitted data frames. This provides the user with a fully data verified point to point communications link. Addressed secured mode provides a functionality similar to that of a client/server network except that there is no server and all of the clients can communicate with each-other. Each modem is given an address with a maximum of 255 clients per network and a maximum of 65535 networks. In I/O copy mode the four digital I/O channels can be used to transfer TTL logic signals from one modem to another. As long as the modem remains in I/O copy mode the signals are automatically resent after a 1 second time-out with ensured reliability via automatic data acknowledgement. Detailed explanations of the available software modes are given in section 2. 1.2 Status LED’s The RF Modem has six LED’s, representing the following signals: • TxD – Transmitting data • RxD – Receiving data • CTS – Clear to send data • RTS – Ready to send data • PWR – Power on 1.3 Connections 1.3.1 Digital I/O When used in I/O copy mode four Digital I/O signals can be presented on the 8 pin SIP header on J2, as shown in the diagram above. Please refer to section 3.3 for control information when using the modem in I/O copy mode. 1.3.2 Power The RF Modem requires a 9 - 12V @ 100mA power source. On the power jack the centre is +ve connection. DS232-4 June ’04 ©2004 Reg. No. 227 4001, ENGLAND Page 3 RS232 RADIO MODEM 1.3.3 RS232 Connector 232C-868FR1 The RF Modem interfaces to the host computer via an RS232 connection using a standard DB9 connector as shown in the diagram below. PC Serial Port DTE (DB25) 8 3 2 20 7 6 4 5 22 RF M odem DCE (DB9F) 1 1 2 3 4 5 6 6 7 8 9 9 9 RTS 7 CTS 8 8 CTS 7 RTS 6 Tx 2 Rx 3 DTR GND 5 5 GND 4 3 4 Rx DTR 2 Tx 1 PC Serial Port DTE (DB9) RF Modem DCE (DB9F) 1.4 Electrical Characteristics Specification Channel center frequency Aggregate air data rate Modulation type Range Conformity testing / Standard Standby current consumption Sensitivity Average CER P1dB Number of channels Selectivity Current consumption Output power @ Vcc = 12 V Number of channels Current consumption Conditions Line of sight 0.004 Receiving CER ACK NACK ACK 1= ACK 1= NACK 1= ACK