Specifications

49
Schneider Electric
20 mA CL – RS232 – RS422 –
RS485 links (continued)
Signal transition time:
Vss = | Vt - Vt* |
Constraints concerning signal form:
b tr & tf < 0.3 x tui.
b Between two transitions (after tr and before tf) the value of Vt or Vt* should not
exceed Vss + 10%.
b Vt and Vt* should never exceed 5 V.
E52334E52335E52336
Vob
Voa
Voa – Vob
VOH
VOL
OV (Diff)
Binary 1
(OFF)
Binary 0
(ON)
A
C
B
G
Vt
50 pF
20%
+
50 Ω
1%
+
Vss
tt
t
fr
ui
0.1 Vss
1.1 Vss
0.9 Vss
OV (Diff)
Guide to Integration
Modbus / Jbus