Watlow CAS200 - Manual (Page 38)

Chapter 2: Installation CAS200 User’s Guide
26 Watlow Anafaze
to their request to send (RTS) signal, or a data set ready
(DSR) in response to their data terminal ready (DTR). The
CAS200 is not configured to receive or transmit these
signals. To use such software with the CAS200, jumper the
RTS to the CTS and the DTR to the DSR in the DB
connector. Table 2.4 lists the standard pin assignments for
DB-9 and DB-25 connectors.
Table 2.4 RTS/CTS and DSR/DTR Pins in
DB-9 and DB-25 Connectors
Cables manufactured by Watlow Anafaze for EIA/TIA-232
communications include these jumpers. WATVIEW does
not require these jumpers.
Figure 2.13 Connecting One CAS200 to a
Computer Using EIA/TIA-232
EIA/TIA-485 Interface
To communicate with more than one CAS200 series
scanner on a scanner network, or to use communication
cable lengths greater than 50 feet (15 m) from PC to
scanner, you must use EIA/TIA-485 communications.
When using EIA/TIA-485 communications, you must
attach an optically isolated 232-to-485 converter to the
computer.
Figure 2.13 and Figure 2.15 show the recommended system
wiring. To avoid ground loops, use an optically isolated 232-
to-485 converter between the computer and the EIA/TIA-
485 network.
DB-9 DB-25
RTS 7 4
CTS 8 5
DTR 4 20
DSR 6 6
EIA/TIA-232
cable
WATLOW ANAFAZE CLS200 WATLOW ANAFAZE CLS200 LO OP LOOP PR OC ES S PROCESS
UN IT S UNITS
AL AR M ALARM SE TP OIN T SETPOINT ST AT US ST ATUS OU T% OUT%
M AN AU TO MAN
AUT O C HN G SP CHNG
SP
A LA RM A CK ALARM
ACK
R AM P S OA K RAMP
SOAK
YE S YE S N O NO BA CK BACK EN TER ENTER