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2) Serial Interface Pin Outs
3) The Serial Interface
The Signal Level
RS-232C or TTL levels can be used. The signal level for the RS-232C is ± 12v and
the TTL levels are 0 to 5v, with 5v having a logic “1” value. Signals in both levels
cannot be used or connected at the same time.
The Data type
Parity bit : No parity.
Data length : 8 bits.
Stop bit : 1 bit.
CLD-V2600 / 2400 Level I & III • Chapter Two
CLD-V2600 / 2400 Level I & III User’s Manual TP 117 v. 2.0 • 12/93 2-11
Pin # Terminal Input/Output Level
1 GND
2 TXD OUTPUT RS-232C
3 RXD INPUT RS-232C
4 DTR OUTPUT +5V PULLUP
5 No Connection
6 No Connection
7 No Connection
8 No Connection
9 TXD OUTPUT TTL
10 RXD INPUT TTL
11 GND
12 No Connection
13 No Connection
14 No Connection
15 GND
Figure 2-M
0
1
START
STOP
D0 D1
D2
D3 D4 D5 D6 D7
1 START + 8 DATA + 1 STOP
Figure 2-N