Watlow Series 734 Data Communications - Manual (Page 5)

5
WATLOW Series 733/734 How to Use Data Communications
RS-423
Figure 2 -
EIA/TIA-423 Inter-
face, Pin Designa-
tions.
˜
NOTE:
The Electronic
Industry Associa-
tion (EIA) EIA/TIA-
423 standard
recommends a
maximum 50 foot
total point-to-point
distance.
EIA/TIA-423 Interface Pinouts (EIA/TIA-232 Compatible)
73xx-xxxx-xBxx
The EIA/TIA-423 communications uses a three wire (full duplex) system. There is
a separate line for transmitting, a line for receiving data, and a line for signal
common between the computer and the Series 733/734. With EIA/TIA-423 you
can have only one Series 733/734 control connected to a single computer.
This diagram is a typical wiring example. The connections on the host computer
may vary depending on models. Refer to your computer user's manual for more
information.
12
11
10
9
8
7
6
5
4
3
2
1
Series 733
(1 unit only)
Transmit
Receive
Common
1 2 3 4 5
6 7 8 9
DB-9 Pinouts
1 DCD
2 receive
3 transmit
4 DTR
5 common
6 DSR
7 RTS
8 CTS
DB-9 female viewed from wire side
(typical connections with jumpers)