Campbell SC-USB, User Manual

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SC-USB USB to CS I/O Opto-isolated Interface
2
provided – see Section 4. This utility can also be used to upgrade the SC-USB’s
own operating system.
Refer to Section 4 if using a 21X, CR7, CR10X-TD or CR23X-TD datalogger,
using call-back, or when upgrading a datalogger operating system using the CSOS
or Device Configuration programs utility.
Please check with Campbell Scientific if you wish to use the SC-USB with a
CR9000X.
If you are using a CR5000 datalogger make sure the datalogger
operating system is version 2.0 or later as this will enable the
highest communication speeds. For older versions set the SC-USB
to work in ME Comms Mode (see Section 4).
2. Technical Specifications
2.1 USB Specifications
 USB Version 1.1
 USB transfer rate up to 12MBits/second
 Active current consumption less than 85mA (current drawn from PC)
 Standby current consumption less than 18mA (current drawn from PC)
 Maximum cable length 3 metres
2.2 CS I/O Port Specifications
 Opto-isolated from the PC/USB to 47V AC or DC. Note that this is
signal
isolation only,
and does not provide safety isolation.
 Supports asynchronous communication from 9600 to 115200 baud and
synchronous communication up to 1MBit/second.
 Campbell Scientific protocols implemented: supports Modem-Enable (ME),
Synchronous Device Communications protocol (SDC) and Concurrent-SDC
(CSDC) modes. Some of these modes may require that the datalogger
operating system be a specific version or higher. The SDC mode only works
with operating systems created since October 2002 (CR10X 1.18 or higher,
CR23X 1.15 or higher, etc.) The CSDC mode only works with a Pakbus (PB)
operating system and the CR5000.
 Dataloggers supported 21X, CR7X, CR500, CR510, CR10, CR10X / TD /
PB, CR23X / TD / PB, CR800 series, CR1000, CR3000 and CR5000.
 PC software compatibility PC200W, PC208W, PC9000, PC400, LoggerNet
and most other packages that support virtual serial ports.
 Active current consumption less than 19mA (current drawn from datalogger).
 Inactive current consumption less than 80µA (current drawn from
datalogger).
NOTE