Laird CL4490 Integration Manual page 11

CL4490 Hardware Integration Guide
Version 1.0
Note: Many simple 2- or 4-wire converters do not provide hardware flow control capabilities and
therefore require you to disable handshaking (Handshaking: None) in the Laird Configuration
Utility to configure the radio. Check with your converter manufacturer for any specific
requirements.
USB
Figure 6: CL4490 USB
The USB bus (of a master device, see
power (maximum 500 mA) through each port on pins 1 and 4. Low power devices that might normally
require a separate AC adapter can therefore be powered via the USB cable, eliminating the need for AC
adaptors. The CL4490-USB draws its power directly from the USB bus and requires no external power supply.
Table 4: CL4490-USB Type B Point
TERMINAL BLOCK PIN
1
2
3
4
USB Device Type
There are two types of USB devices; masters and slaves. A USB master device is a host device (such as a PC)
that supplies the USB drivers. A USB slave device (peripheral devices such as a keyboard, mouse, etc.)
connects to a USB master device and uses the USB driver supplied by the host.
When a USB slave device connects to the host, the host prompts the device for the appropriate USB driver.
Once the driver is located, the host loads and retains it for all subsequent connections of the slave device.
Note: The CL4490 is a USB slave device (peripheral) and cannot connect to another USB slave device.
USB Driver
The CL4490 is a stand-alone RF module that interfaces to a USB port on the host device. It uses a Virtual
COM Port (VCP) driver that causes the device to appear as an additional COM port on a PC. Application
software can then access the USB device in the same manner it would access a standard COM port.
The CL4490-USB is a plug-and-play device that the PC automatically detects upon connection. Once
detected, the PC starts the
Note: The Laird USB driver installs with the Configuration Utility. You may also install it manually:
1. Connect the CL4490-USB device to the PC using a USB cable.
2. Download WirelessSerialDeviceDriverInstall.zip from the
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
www.lairdtech.com/ramp
USB Device Type
SIGNAL NAME DESCRIPTION
V
4.75 – 5.25 V
BUS
D - Transmit/Receive Data
D + Transmit/Receive Data
GND Ground
Add New Hardware
wizard and installs the USB driver.
for more information) supplies 5 V DC regulated
CABLE COLOR
Red
White
Green
Black
USB Drivers
11
link and unzip to local PC.
Laird Technologies