ESI VideoBridge 2150, Service Manual

Page: 264 / 332

4. Output Rela y s -- a re acti ve L O W contact clo sure s w h i ch select
b i n s a c c o r d i n g t o p re s et l i m i t s ( s e e S e ct i o n 2 . 7 , C o mp o n e nt
S o rt i ng). One relay i s clo se d at a t i me . The relay s are rated at
1 0 0 V D C , 2 5 0 mA s w i tch i n g cu r re nt , a n d 1 0 m i ll i o n o pe r at i o n s .
H i ghe r cur re nt s may cause a p o s s i ble reduct i on i n o pe rat i on l i fe ,
e s pe c i ally i f contacts arc o n o pe n i ng. Re s i st i ve l oads are more
de s i rable than i nduct i ve loads. Relay s w i tch i ng may tak e 3 -4ms .
5. 5 V T T L ( o p e n c o llect o r ) O utput s -- a re a v a i l a b le at the r e a r
p a n e l OUTPUTS c o nnector ( act i ve HIGH). They re qu i re the add i t i o n
of a jumpe r w i re i n place of each output relay.
P r ogrammi ng 8 CODE ( handle r mode w i thout d i s play ) i s recomme nded f o r
faste st handle r i nte rface o pe rat i on. -8 C O D E i s slowe r but d i s play s
re sults: the B U S Y s i gnal i s exte nded app r ox i matel y 1 1 0 m s f o r d i s play
update t ime bef o re the next S TAR T s i gnal w i ll be recogn i zed.
In add i t i o n , te st c ode 1 0 can be u sed i n c o n junct i o n w i th e i the r te st
code 8 o r -8 f o r remote output to channel B of the R S -2 3 2 C I nte rface
opt i on. Thi s als o exte nds the B U S Y s i gnal app r ox i mately 1 1 0m s befo re
the next S TART s i gnal w i ll be recogn i zed ( fo r a total of app r oximately
2 2 0m s i n te st code -8).
The Handle r Inte rface t i me s l i sted unde r F i gure A-2 we re dete r m i ned
unde r the se te st cond i t i o n s ( othe r setup s may affect t i me s):
Te st F re que ncy
=
1 kHz
Settl i ng T i me
=
2ms
Numbe r of Ave rage s
=
1
RANGE HOL D
FAST
el sl i
Te st S i gnal
=
1 0 0 0 mV
Integrat i on T i me
=
2 m s
Baud Rate
=
9 6 0 0
Value o f comp one nt-unde r-te st
=
In F
A - 5
2 1 5 0 / 2 1 6 0 9 / 8 5