DMD-480-S2 SERIES AC POWERED BRIDGESENSOR - RS232 INTERFACE
3
One Omega Drive, P.O. Box 4047
Stamford, CT 06907
http://www.omega.com
DMD-480-S2 SeriesUSER’S MANUAL
PREOPERATION
A. DMD-480-S2 SERIES HOOK-UP
(REFER TO FIGURE 1 AND TABLE 1 FOR SCREW TERMINAL DESIGNATION)
1. CONNECT AC TO SCREW TERMINALS 5 AND 6 OF THE DMD-480-S2
SERIES TERMINAL BLOCK.
2. USING A ONE TO ONE DB9 CABLE, CONNECT ONE END TO YOUR
COMPUTERS SERIAL PORT, (COM1 OR COM2 ONLY), AND THE OTHER
END TO THE DMD-480-S2 SERIES FEMALE DB9 CONNECTOR.
THE RECOMMENDED MAXIMUM CABLE LENGTH IS 50 FT. WHICH IS
DETERMINED BY THE MAXIMUM SPECIFIED CABLE CAPACITANCE
OF 2500pF.
3. CONNECT THE STRAIN GAGE OUTPUT TO THE DMD-480 SERIES ± INPUT,
TERMINALS 1 AND 2 OF THE DMD-480-S2 SERIES TERMINAL BLOCK.
TERMINAL 1= +INPUT, TERMINAL 2= -INPUT.
4. CONNECT THE STRAIN GAGE +EXCITATION INPUT TO THE DMD-480
SERIES TERMINAL BLOCK, TERMINAL 4, AND THE STRAIN GAGE -
EXCITATION INPUT TO TERMINAL 3.
FIGURE 1
TERMINAL FUNCTION
1+INPUT
2-INPUT
3-EXCITATION
4+EXCITATION
5AC
6AC
TABLE 1
DMD-480-S2 Series Block Diagram