CL4790-1000-232 Laird Technologies, CL4790-1000-232 Datasheet - Page 10

• Manufacturer Part Number: CL4790-1000-232
• Description: TXRX 900MHZ RS232 1W W/ANT DB9
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of CL4790-1000-232

• Function: Transceiver
• Modulation Or Protocol: FHSS, FSK
• Frequency: 902MHz ~ 928MHz
• Applications: General Purpose
• Interface: RS-232
• Sensitivity: -99dBm
• Power - Output: 1000mW
• Data Rate - Maximum: 115.2kbps
• Voltage - Supply: 7 V ~ 18 V
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: RS-232, RS-485
• Board Size: 121 mm x 70 mm x 30 mm
• Modulation: FHSS, FSK
• Security: 1 byte System ID, DES
• Operating Voltage: 100 V to 120 V
• Output Power: 1000 mW
• Antenna: Dipole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

DCE Pin
Number
CL4790 User’s Manual
2. Interfacing Protocol
The CL4790 is a DCE (Data Communications Equipment). A DCE can be interfaced to a DTE
using a straight through serial cable (the serial cable provided with the CL4790 is a straight
through cable). Typically, PC’s are defined as a DTE and peripherals are defined as DCE. To
interface a DCE with another DCE, or a DTE with another DTE, a null modem (or a Crossover)
cable is required. The null modem simply swaps pins to convert a DCE to a DTE and vice-versa.
A null modem cable can be provided with the CL4790 on request.
The CL4790 transceivers support the following interface protocols
Table 1 – DTE, DCE and Null Modem Signal Definitions
6/24/2005
1
2
3
4
5
6
7
8
9
•
•
RS-232
RS-485 (2-wire) Half Duplex
DCE Signal
Name
DCD
GND
DSR
RXD
DTR
CTS
TXD
RTS
RI
Direction
DCE
O
O
O
O
O
I
I
I
DTE Pin
Number
1
2
3
5
6
7
8
9
4
DTE Signal
Name
GND
DCD
RXD
DSR
CTS
TXD
DTR
RTS
RI
Direction
DTE
O
O
O
I
I
I
I
I
Female DB9
Null Modem
1
2
3
4
5
6
7
8
9
Null Modem
Male DB9
NC
NC
3
2
6
5
4
8
7
10