Omega DP41-B Series User Manual page 9

2. Hardware
S2
A B
S1
You should install the option board in such a way the pin "1A" of "P11" is
aligned with pin "1A" of "J11" (on main board, refer to Figure 2-2).
When interfacing the meter to devices that do not have handshaking lines, i.e.
RTS/CTS, the S3-E Jumper should be installed. However, when interfacing to a PC,
the S3-E should be removed.
JUMPER
S1-A
S1-B
S2-A
S3-A
(CLOSE FOR TERMINAL
RESISTOR)
S3-B
S3-C
(CLOSE FOR TERMINAL
RESISTOR)
S3-D
S3-E
(CLOSE FOR RTS TRUE)
S4
(CLOSE FOR
CONTINUOUS MODE)
Note: * means optional, select as required.
A
A
S4
Figure 2-1. RS-232 / RS-485 Option Board
RS232
CLOSE
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
*
OPEN
A B C D E
S3
RS485 HALF DUPLEX
OPEN
CLOSE
CLOSE
*
CLOSE
*
CLOSE
OPEN
*
2-2
6
1
RS485 FULL DUPLEX
OPEN
OPEN
CLOSE
*
OPEN
*
OPEN
OPEN
*