Campbell SM4M, Instruction Manual

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5-1
Section 5. Data Retrieval
Data retrieval is accomplished on PCs using SMS (part of the PC208W package). Other
computers require a software program which makes use of the Storage Module
telecommunications commands (Appendix B). This process requires both a hardware
interface and a software program.
5.1 Hardware
There are two interfaces which enable communication between a computer and
the Storage Module:
1. The SC532(A) Peripheral to RS232 Interface
2. The CR500/510, CR10/10X or CR23X with a suitable cable and interface
(not possible with other dataloggers)
The SC532(A) can function with any computer that has an RS232 port. A
software program is required to raise the DTR and RTS (pins 20 and 4,
respectively) to activate the Storage Module (Section 5.2). SMS performs this
function automatically.
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Logan, UT
SM4M
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SOLID STATE STORAGE MODULE
MADE IN USA
FIGURE 5-1. Storage Module Connected to a Portable PC via an SC532(A) Interface
5.1.1 SC532(A) Interface
A standard 25-pin ribbon cable (e.g., Campbell Scientific SC25) links the
SC532(A) to the computer’s 25-pin serial port. If the computer has a 9-pin
serial port, a 9-pin to 25-pin adaptor cable is required. For the SC532A you
will need a standard 9-pin (or 25-pin, depending on your PC) to 9-pin data
cable for linking PC to interface. The SC12 9-pin ribbon cable links the
Storage Module to the SC532(A) (see Figure 5-1).
The SC532(A) requires 12 VDC (nominal) which is usually provided by
plugging the AC adapter into a standard 120 VAC outlet. The use of battery
power is possible and is described in the SC532(A) manual. The SC532A also