Omega DP41-B Series User Manual page 11

2. Hardware
Figures 2-4A and Figure 2-4B show the four-wire RS-232 connections between the
host computer/controller using either a 9-pin or 25-pin "D" connector and the meter
(point-to-point full duplex, with RTS handshake).
4 3
4 3
Table 2.1 shows the pin connection assignments between the RS-232 connection on
the meter and the 9-pin or 25-pin "D" connectors of your computer.
Table 2.1. Meter Hookup (RS-232) to the Computer
PIN SIGNAL/FUNCTION
RTS, meter from computer
TX, meter = RX, computer
RX, meter = TX, computer
Return
NC (not connected)
Table 2.2 shows the pin connection assignments between the RS-232 connection on
the meter and the 9-pin or 25-pin "D" connectors of your printer.
Table 2.2. Meter Hookup (RS-232) to the Printer
PIN SIGNAL/FUNCTION
RTS, meter
TX, meter
RX, meter
Return
NC (not connected)
2 1
RJ-11
Figure 2-4A. RJ-11 to D9 Connector
2 1
RJ-11
Figure 2-4B. RJ-11 to D25 Connector
METER
(DCE)
RJ-11
1
2
3
4
METER
RJ-11
1
2
3
4
COMPUTER
(DTE)
RJ-12 D9
2 7
3 2
4 3
5 5
1,6 (all others)
PRINTER
RJ-12 FUNCTIONS
2 Data Terminal Ready (DTR)
3 Received Data (RXD)
4 Not Connected
5 Signal Return
1,6
2-4
5
3
2
7
D9
7
2
3
4
D25
D25
4
3
2
7