Watlow CPC400 - Manual (Page 56)

Chapter 2: Installation CPC400 Series User’s Guide
42 Watlow Anafaze Doc. 0600-2900-2000
Table 2.7 EIA/TIA-232 Connections
Jumpers in EIA/TIA-232 Connectors
Some software programs and some operator interface ter-
minals require a clear to send (CTS) signal in response to
their request to send (RTS) signal, or a data set ready
(DSR) in response to their data terminal ready (DTR). The
CPC400 is not configured to receive or transmit these sig-
nals. To use such software with the CPC400, jumper the
RTS to the CTS and the DTR to the DSR in the DB connec-
tor. Table 2.8 lists the standard pin assignments for DB-9
and DB-25 connectors.
Table 2.8 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. Neither WAT-
VIEW nor LogicPro software requires these jumpers.
Figure 2.30 Connecting One CPC400 to a Com-
puter Using EIA/TIA-232
Wire
Color
CPC400
TB1
DB 9
Connector
DB 25
Connector
White TX Pin 26 RX Pin 2 RX Pin 3
Red RX Pin 25 TX Pin 3 TX Pin 2
Black GND Pin 23 GND Pin 5 GND Pin 7
Green GND Pin 24 N/U Pin 9 N/U Pin 22
Shield N/C GND Pin 5 GND Pin 7
DB-9 DB-25
RTS 7 4
CTS 8 5
DTR 4 20
DSR 6 6
EIA/TIA-232
cable