88
UBI EasyCoder 501 – Technical Manual
INTERFACES, cont'd.
RS 422 on "uart1:", cont'd.
On the CPU board, check:
■
An optional RS 422 circuit must be fitted on IC-207.
■
Jumper must be fitted on the lowest position of P-202 to select
RS 422.
■
Jumper must be fitted on some of P-204 – P-209 according to
diagram below.
❑
RS 232C circuit on IC-200 (standard), jumper on P-200, and
opto-couplers on IC-205 and IC-206 (optional) are of no conse-
quence.
P-203 External 5 Volt
1
:
Jumper fitted co5V to pin 16. Warning! Max. 200 mA.
(Note that +5V requires an additional wire in the cable).
P-204 – P-209 Communication straps:
Jumpers can be fitted on P-204, P-205, P-206, P-207, P-208 and/or
P-209 in order to adapt the RS 422 communication to the host, as
shown in the diagram below. Normally, jumpers should be fitted on
P-205, P-207 and P-209.
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!
IC-207
DI
RO
RI+
RI-
DO+
DO-
+ RS422 IN
- RS422 IN
+ RS422 OUT
- RS422 OUT
15
17
19
21
P-201
("uart1:")
+5V +5V
P-208
P-209
P-206
P-207
P-204 P-205
/TXD
/RXD
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Содержание EasyCoder 501
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