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I n t e r f a c e s
PAG E 5 8
A1.3
RS232C Interface
The RS232C interface is for the configuration and monitoring of the MAGIC
ETI Decoder system from a PC.
TAB. 7
1
5
Connector: RS232C (SUB-D, 9-pole)
6
9
Pin
1
2
3
4
5
6
7
8
9
a
Pre-setting: 8 Bits
b
The following parities can be set: none, even, odd. Pre-setting: none
A1.4
TTL-USER-I/O Interface
This interface is used to transmit control signals to external units. Three of
these signals are used for the control of the three relays. The other five signals
are not in use.
TAB. 8
1
5
Connector: TTL USER-I/O (SUB-D, 9-pole)
6
9
Pin
1
2
3
4
5
6
7
8
9
PIN ASSIGNMENT: RS232 INTERFACE
Signal
not used
RXD
Receive Data
TXD
Transmit Data
DTR
Data terminal ready
GND
Ground
DSR
Data set ready
RTS
Request to send
CTS
Clear to send
not used
PIN ASSIGNMENT: TTL-USER-I/O INTERFACE
Signal
TTL_1_IN/OUT
used for Relay 1
TTL_3_IN/OUT
used for Relay 2
GND
TTL_5_IN/OUT
used for Relay 3
TTL_7_IN/OUT
TTL_8_IN/OUT
Electrical characteristics
Type:
DTE
Level:
V.24
Data rate:
300 to
38400 Baud
Range:
max. 15 m
Protocol:
1 start bit
7 or 8 data bits
b
1 parity bit
1 stop bit
Electrical characteristics
Level:
TTL/CMOS
Max. Load:
20 mA
a
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