Regulus uREG, User Manual

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uREG User Manual
90
16.1.1. RS-232 INTERFACE
Information interchange via RS 232 (EIA RS-232C) uses a 5-line link with a subset of signal
for direct operation together with a PC, modem, or alternatively, another supervisory system.
RS 232 interface lines are arranged in a
DB9M connector (male):

RxD pin 2 - Received data

TxD pin 3 - Transmitted data,

RTS pin 7 - Request to Send,

CTS pin 8 - Clear to Send,

SG pin 5 - Ground,

PI pin 6 - Pin-in,

PO pin 1 - Pin-out.
Fig. 16.1.1. DB9M connector for RS 232 interface.
The RS 232 connector has galvanic separation.
CAUTION:
Pin 1 (PO) and pin 6 (PI) must be shorted in an external plug of the connecting cable. (These pins
are used to close the local interface power circuit when being connected to the computer). It is
not allowed to connect up pins 1 and 6 to other circuits.
RS 232 interface is designed by data interchange in full-duplex or half-duplex, and principally in
the end-to-end topology.
Code-oriented transmission parameters such as baud speed, parity bit selection and duplex
range are to be programmed by means of settings (→ 1
Auxiliary settings → 11 UART
communication ).
Baud rate can be programmed within the range 300 to 115200 baud, which is common for both
directions of transmission directions. Transmitted characters are entirely in the 8-bit ASCII set.
If character-oriented parity check is applied, in the 9th bit position, it can be zero’s complement
(even parity) or one’s complement (odd parity). The interface can also serve its purpose
without parity check (no parity). The number of stop bits is fixed. Information interchange is
performed as defined for the protocols:
uCZIPstd
or
uCZIPnet
.
Factory settings* of the RS-232 connector →
19 200 Bd, parity, full duplex , uCZIPstd protocol .
* – Conformity with default settings of CZIP and CZIP-1,2,3,4 units.