Edwards SA-232 - Computer Download Wiring; Wiring to a Computer

2 / 4 P/N 3101095 • REV 03 • REB 25JAN13
Figure 4: DB-25 pin connections
PIN 25
PIN 1
DB-25 male
(front view)
Pin 7: COM (black wire)
Pin 20: DTR (green wire)
Table 1: SA-232 card to printer DB-25 connections
SA
-232 card DB-25 Description
GND
COM (pin 7) Black wire (ground connection)
RTS
DTR (pin 20) Green wire (printer supervision)
TXD
RXD (pin 3) White wire (communication)
RXD
TXD (pin 2) Red wire (communication)
Computer download wiring
Wiring to a computer:
1. If you have a connected printer, disconnect it.
2. Locate a serial port (COM port) on the back of the
computer.
3. Connect the DB-9 end of the RS-232 cable to the COM
port on the back of the computer.
4. Connect the other end of the RS-232 cable to the
RS-232 card.
Figure 5: Computer download wiring
RS-232 cable
DB-9 male
Computer
DB-9 COM port
on back of computer
To RS-232 card
Figure 6: DB-9 pin connections
DB-9 male
(front view)
Table 2: SA-232 card to computer DB-9 connections
SA
-232 card DB-9 Description
GND
COM (pin 5) Black wire (ground connection)
RTS
- Not used
TXD
RXD (pin 2) White wire (communication)
RXD
TXD (pin 3) Red wire (communication)
Specifications
Operating voltage
24 VDC
Serial communications
Asynchronous communicatio
ns maximum
resistance: 13 Ω
Maximum capacitance: 0.7 µF
Wire length
50 feet max.
Signal voltage
+/- 10 V
Operating current
Standby/Alarm: 13 mA
Max.: 20 mA
Terminal rating
12 to 18 AWG (0.75 to 2.5 mm
2
)
Printer communication
speed
9600 baud
Operating environmen
t
Temperature
Humidity
32 to 120°F (0 to 49°C)
0 to 93% RH, noncondensing at 90°F
(32°C)