Spectravideo SVI 318 Service – Technical Manual page 99

RS- 2 3 2 I n t e r f ace S p ec i f i c a t i o n
C h a r a c t e r i s t i c s - E I A R S- 2 3 2 C
S i g n a l
1 .
R e c e i ve
a . Mark
b . S p a c e
2 . T r a n sm i t
a .
· M ark
b . S p a c e
M a x i mum s h o r t c i r cu i t cu r r e n t
T e r m in a t i n g Impe n d a n c e
S i g n a l C h a r a c t e r i s t i c s - O p t i on a l
Whe n u s i n g t h e Te l e t yp e Mode l 3 3 o r s i m i l a r d a t a t e rm i na l emp l o y ing
re n
cu r t i n t e r f a c e , t he
F u l l -Dup l e x
e q u ipment
ma n u a l f o r i n s t r u c t i o n s .
TERM I N AL In t e r face P i n A s s i g nme n t s
P i n
1
2
3
5
6
7
8
20
1 6
2 5
25
( 1 6 and a re o p t i ona l f e a t u r e s )
- 3 t o
+ 3 t o
-8 vo l t s w i t h
+ 8
20
da ta
t e rm i n a l
20
M i l l i ampe r e N e u t r a l c o n f i g u ra t i o n .
-
F un c t i on
P ro t e c t i ve G r ound
T ra n sm i t t e d Da ta ( D a t a In )
Re c e i ve d D a t a
C l e a r to Send
Da t a Set
Rea dy
S i gna l Ground
Da ta C a r r i e r De t e c t o r
D a t a Term ina l Rea dy
R dy / Busy O u t pu t ( R dy=OV , Bu sy= + SV )
r
S t a t / S t o p Inpu t ( S t a r t =OV , S t op=+5V )
4 . 66
- 2 5
vo l t s
+ 2 5
vo l t s
3 K
ohm l oa d
vo l t s w i t h 3 K O hm l o a d
500 rnA
3K 7K
t o
rnA
Cu r r e n t L o op
MUST
be s e t
R S- 2 3 2 C
E I A
( D a ta Ou t .)
ohm
up to ope r a te i n t h e
to the re l a t e d
Re f e r
a