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Summary of Contents for Laird CL4790
- Page 1 CL4790 ARDWARE NTEGRATION UIDE ERSION Americas: +1-800-492-2320 Europe: +44-1628-858-940 Hong Kong: +852-2923-0610 www.lairdtech.com/ramp...
- Page 2 The preceding statement must be included as a CAUTION statement in manuals for OEM products to alert users on FCC RF Exposure compliance. Caution: Any change or modification not expressly approved by Laird could void the user’s authority to operate the equipment.
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Page 3: Revision History
CL4790 Hardware Integration Guide Version 3.0 EVISION ISTORY Version Date Changes Approved By Initial Release Chris Downey Changes and Revisions Chris Downey 02 Aug 2013 Major changes and revisions; updated format and data Chris Downey Separated Hardware Integration Guide (HIG) from User 18 Dec 2013 Guide information (created two separate documents). -
Page 4: Table Of Contents
CL4790 Hardware Integration Guide Version 3.0 ONTENTS Revision History ............................3 Contents ............................... 4 CL4790 RF Transceiver ..........................5 Overview ................................ 5 Features ................................ 5 Detailed Specifications .............................. 6 Status LEDs ..............................7 Serial Interface ............................. 8 Hardware Flow Control ............................11 Hardware .............................. -
Page 5: Cl4790 Rf Transceiver
CL4790 transceivers operate in a Masterless architecture. When a CL4790 has data to transmit, it will enter transmit mode and start transmitting a sync pulse intended for an individual radio or broadcast to all transceivers within the same network and range. -
Page 6: Detailed Specifications
CL4790 Hardware Integration Guide Version 3.0 Detailed Specifications Table 1: CL4790-1000 Specifications INTERFACE DB-9 Male (RS232), Terminal Block (RS485) Serial Interface Connector RPSMA Jack RF Connector Baud rates from 1200 bps to 115.2 Kbps Serial Interface Data Rate 400 mA @ 12 VDC... -
Page 7: Status Leds
Green On. Indicates the unit is powered up. Link On. Indicates the CL4790 is In Session. Green When flashing, indicates the CL4790 is receiving data. When flashing, indicates the CL4790 is transmitting data. CONN-HIG_CL4790 Americas: +1-800-492-2320 Option 2 Europe: +44-1628-858-940 Hong Kong: +852-2923-0610 www.lairdtech.com/ramp... -
Page 8: Serial Interface
(power/logic ground). The “idle” state (MARK) has the signal level negative with respect to common, and the “active” state (SPACE) has the signal level positive with respect to common. Table 3: CL4790 DB9 Male Connector Pinout (as defined at the CL4790) Signal Name... - Page 9 PC to your peripheral device, you’ll need to use a straight- through serial cable between the PC and the CL4790 and a null modem adapter, or cross-over cable, between the other CL4790 and the peripheral device.
- Page 10 The nodes have unique addresses and can send addressed packets to specific nodes. Because the bus is half duplex, no two nodes should try to talk at the same time. The CL4790 does not have a RS485 address; therefore it transmits all RS485 traffic over the RF. Conversely, as soon as the CL4790 receives a packet over the RF, it transmits the packet over the RS485 bus.
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Page 11: Hardware Flow Control
(rather than over the air), one CL4790 cannot tell the other CL4790 to slow down or speed up. The CL4790 controls the Clear to Send (CTS) output to the OEM host. The state of the CTS pin is based on the amount of data in the interface buffer. -
Page 12: Hardware
CL4790 Hardware Integration Guide Version 3.0 ARDWARE Mechanical Drawing Figure 7: Mechanical Drawing Approved Antenna List Table 5: CL4790 approved antennas Laird Part # Manufacturer Part # Manufacturer Type Gain (dBI) CL4790-1000 0600-00019 S467FL-5-RMM-915S Nearson 1/2 Wave Dipole 0600-00025 S467FL-5-RMM-915... - Page 13 CL4790 Hardware Integration Guide Version 3.0 ELATED OCUMENTS AND ILES The following additional CL4790 technical documents are also available from the Laird RAMP ConnexLink modules product page under the Documentation tab: Product Brief CL4790 User Guide The following downloads are also available from the Laird RAMP ISM modules product page: ...
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