PRECITEC CHRocodile C - Page 19

19
The interface contains the connection points for the synchronization and RS422 or RS232 serial
communication.
The serial RS232/RS422 is interfaced on the multipoint connector interface (9 pins). Serial
communication are mostly used for sending command as a hyper-terminal, and can also support data
transfer. The maximum transfer rate RS232/RS422 is 1843200 Bd.
PIN
SIGNAL
1
RS232 TX / RS422 TX-
2
RS232 RTS / RS422 TX+
3
RS232 CTS / RS422 RX-
4
RS232 RX / RS422 RX+
5
GND
6
Sync In
7
Sync Out
8
Reserve
9
GND
Table 2.2: Multipoint connector PIN / Signal correspondence
Signal
Function
Description
RS422
RS422
Interface
RS422 (differential signaling) Interface, internally terminated,
no handshaking
RS232
RS232
interface
RS232 interface, RTS/CTS handshaking possible
Sync In
Sync. Input
Positive slope from 0V to 5-24V causes according to the
settings of the sensor:
 starts the continuous measurement, if the command
wait for trigger was received first (TRG Command)
 starts the single measurement in mode trigger each
(TRE Command)
When in TRW mode, a positive slope starts continuous
measuring, a negative slope stops the measurement
the input has an internal 10 kΩ pullup-resistor to 5 V.
Sync Out
Sync. Output
Sync Output
Positive slope 0 V to 5 V with the start of each measurement.
Table 2.3: Interface