Filter
Top Products
C2604M (7/06) 17
Table B. Data Connector Pin Assignments
Pin
Number RS-232 RS-422
RS-485
2-Wire
RS-485
4-Wire Manchester Bi-Phase
1— TX+ (Out+) T+/R+ (Out+/In+) TX+ (Out+) — —
2— TX- (Out-) T-/R- (Out-/In-) TX- (Out-) — —
3— RX+ (In+) — RX+ (In+) RX+ (In+) (W) RX+ (In+)
4— RX- (In-) — RX- (In-) RX- (In-) (B) RX- (In-)
5 RX (In) — — — — —
6 TX (Out) — — — — —
7— —— —TX+ (Out+) (W) TX+ (Out+)
8— —— —TX- (Out-) (B) TX- (Out-)
9 Ground —* —* —* Shield Shield
*Ground may be required based on conditions of installation. Refer to the current version of
EIA/TIA-422 and EIA/TIA-485 standards for additional information.
NOTES:
• RX (In), RX+ (In+), RX- (In-), R+ (In+), and R- (In-) denote data input to the transmitter/
receiver.
• TX (Out), TX+ (Out+), TX- (Out-), T+ (Out+), and T- (Out-) denote data output from the
transmitter/receiver.
• W denotes white wire, and B denotes black wire.
• Data ports are not terminated. For RS-422, RS-485 2-wire, RS-485 4-wire, Manchester, and
Bi-Phase data signals, termination may be required based on conditions of installation.
If termination is required, terminate the data signal at the endpoint of the data bus using a
120-ohm resistor.
C2604M.book Page 17 Friday, July 14, 2006 1:08 PM