SYSMEX SF-3000 - Interface Circuit; Signal Level

TECHNICAL INFORMATION, Serial Interface
Sysmex SF-3000 Operator's Manual -- Revised September 1995 C-3
1.5 Signal Level
Signal level of the RS-232C conforms to the EIA RS-232C V.24 standard.
LEVEL BINARY STATE FUNCTION
+3 V or Higher Logic "0", Start Bit ON
-3 V or Lower Logic "1", Stop Bit OFF
Table C-3: RS-232C Signal Level
1.6 Interface Circuit
(1) Output Circuit
300K
MC145407 Driver
OUT
EMI Filter
Vss
VDD
Figure C-1: Interface Output Circuit
(2) Input Circuit
15K
MC145407 Receiver
IN
EMI Filter
5.4K
Figure C-2: Interface Input Circuit