semaphore TBOX LT2-530 Series, Руководство пользователя, Страница: 168 / 197

Version : 1.09 168
20.4. RS485
Connector: Spring Cage Terminal block
(see Appendix H)
Example:
Cabling
TB
OX
LT2
to
TB
OX
MS16
About RS485 cabling:
Use a twisted pair for signal A and B.
RS 485 is not isolated. If cabling equipment in different buildings (different Earth), you have to
use ACC-RS485 (ask your local distributor)
Maximum length depends on quality of cable, speed and quantity of stations (max. 256 x
TBox
stations). In good condition, guaranteed to 1.2 km (max. 256 x
TBox
stations @
9600 Bps) In practice, longer distance can be reached with lower Baudrate and fewer
stations.
Cable:
- Twisted pair (2 pairs: one pair for A and B; one pair for Gnd)
- cross-section: minimum 0.5mm²
- screening: pair and global screening
- reference: Li2YCY-PiMF
1
2
3
A+
B-
Gnd
Gnd
A+
B-
PS & RS Connector