Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 66)

Publication 900-UM007D-EN-E - January 2011
2-28 Preparations
RS-232C Communication to a Personal Computer —Bulletin 900-TC8 Only
By using the appropriate option communications unit in the Bulletin 900-TC8
or 900-TC16 Controller, you can communicate with a personal computer.
Figure 2.27 — Communication Unit Connection Diagram
➊ RS232C for 900-TC8 only.
The RS-232C connection is one-to-one (PC to one Bulletin 900-TC8). The
maximum cable length for RS-232 is 15 m. An optional 3 m RS-232C interface
cable (Cat. No. 900-CP1x) is available as an extension cable if necessary. If you
make your own cable, use shielded, twisted pair cable (AWG 28 or larger).
Note: To configure the 900-TC8 using RS232 communication optional
software (900BuilderLite) is available.
RS-485 Communication to a Personal Computer
When the optional RS-485 communications unit is mounted in the Bulletin
900-TC8, 900-TC16, or 900-TS32, RS-485 communication with a personal
computer is possible. Connect the RS-485 communications cable across
controller terminals 11 and 12 for 900-TC8 or 900-TC16. Connect the RS-485
communications cable across controller terminals 7 and 8 for 900-TC32.
• Specify both ends of the transmission path, including the personal
computer as the end node (that is, connect termination resistors to both
ends).
The minimum terminal resistance is 54
Ω. (See Figure 2.28.)
PC
900-TC8
SD(TXD)
RD(RXD)
RS(RTS)
CS(CTS)
DR(DSR)
SG
ER(DTR)
FG
1
4
5
6
8
7
2
3
RS-232C
No.
11 SD
12 RD
13 SG
9 Pin
(RS232C)
➊