Rs232/Rs422 Wiring - Omega DPF78 SERIES User Manual

COMPUTER HOOKUP:
RS 232: When connecting the unit to a computer with RS 232
communication, only three connections are needed. These
connections are: Receive data, Transmit data and Ground.
The connections should be made as follows:
DP -9 CONNECTOR
Transmit data (pin 2)
Receive data (pin 3)
Ground (pin 5)
RS 422: When connecting the unit to a computer with RS 422,
five connections are needed. These connections are: Re-
ceive data A (+), Receive data B (-), Transmit data A (+),
Transmit data B (-) and Ground. The connections should be
made as follows:
DP -9 CONNECTOR
Transmit data A(+) (pin 2
Transmit data B(-) (pin 7)
Receive data A(+) (pin 3)
Receive data B(-) (pin 8)
Ground (pin 5)
PRINTER HOOKUP:
When connecting the unit to a printer, you must first program
the desired baud rate, parity and strobe list with a computer.
After the unit is programmed it can be connected to the printer.
Connect the transmit line(s) of the unit to the receive line(s) of
the printer and be sure that both devices have common
grounds. When the strobe line is triggered the unit will transmit
the selected strobe list which you had previously pro-
grammed.
RS232 / RS422 WIRING
COMPUTER
Receive data
Transmit data
Ground
COMPUTER
Receive data A(+)
Receive data B(-)
Transmit data A(+)
Transmit data B(-)
Ground
19
RS 232
RECEIVE PIN (3)
TRANSMIT PIN (2)
RST D E
A B C
ENTER LOCK PRE A PRE B VIEW PRGM
GROUND PIN (5)
RS 422
RECEIVE A (+) PIN (3)
RECEIVE B (-) PIN (8)
TRANSMIT A (+) PIN (2)
RST A D E
B C
ENTER LOCK PRE A PRE B VIEW PRGM
TRANSMIT B (-) PIN (7)
GROUND PIN (5)
9
5
RS 232
1. INITIALIZE
2. TRANSMIT
3. RECEIVE
4. N/C
5. GROUND
6. STROBE
7. N/C
8. N/C
9. N/C
RS 232
STROBE PIN (6)
+12V PIN (7)
(BOTTOM BOARD)
TRANSMIT PIN (2)
RST
A B C D E
ENTER LOCK PRE A PRE B VIEW PRGM
GROUND PIN (5)
RS 422
STROBE PIN (6)
+12V PIN (7)
(BOTTOM BOARD)
TRANSMIT A (+) PIN (2)
RST A D E
B C
ENTER LOCK PRE A PRE B VIEW PRGM
TRANSMIT B (-) PIN (7)
GROUND PIN (5)
8 7 6
4 3 2 1
RS 422
1. INITIALIZE
2. TRANSMIT A (+)
3. RECEIVE A (+)
4. N/C
5. GROUND
6. STROBE
7. TRANSMIT B (-)
8. RECEIVE B (-)
9. N/C