85
UBI EasyCoder 501 – Technical Manual
232
CL
422
"UART1:"
P202
IC-200
P203
3 2 1
P200
+
-
RS 232C (V24) is the most common interface for serial communi-
cation with computers over short distances. The transmission can
only take place between one transmitter and one receiver. The most
simple form of two-way communication only requires a 3-wire
cable. The maximum transmission distance is about 10–15 metres
(33–49 ft.) and the maximum transmission speed is 19,200 baud.
■
RS 232C circuit must be fitted on IC-200 (fitted as standard).
■
Jumper must be fitted on uppermost position of P-202.
❑
RS 422 circuit on IC-207, opto-couplers on IC-205 and IC-206
(optional) and straps on P-204 – P-209 are of no consequence.
The following hardware straps can be fitted:
P-200
DTR-signal:
Pin 1–2
DTR indicates printer turned on.
Pin 2–3
A copy of the flow signal RTS is produced.
P-203
External 5 Volt
1
:
Jumper fitted co5V to pin 16. Warning! Max 200 mA.
INTERFACES, cont'd.
RS 232C (V24) on "uart1:"
Continued!
IC-200
(RS 232C circuit)
P-203
(ex5V)
P-202
(Interface select)
P-200
(DTR/RTS select)
1
/. Warning! Be careful not to enable the
external 5V unintentionally, which may
cause harm to the terminal, PC or other
device connected to this port!
