Detailed Specifications; Configuration 01 Interface Signals; Electrical Specificationsof Input Signals; Function Of Input Signals - Epson SMD-100 series Specification

4. Oetailed Specifications
4.1
Configuration of interface signals
Tha SMD-l00 series (low power consumption) flexible disk drives are
designed so that a maximum of
4
drives can be connected in a daisy chain
configuration. All signal input levels are
~TL
compatible.
The power supply and interface require +SV and +12 V power.
4.1.1
Electrical specifications of input signals
... Low" :;
TRO E
VIN: OV to +O.4V
I
IN:
5mA ('l''iP)
"High" FALSE
VIN: +2.5V to +5.25V
IIN: OmA
(open)
+sv
1
~
lk{l
D ~~----------~I~[~
1438
5. 6 KO
C-MOa
The terminating resistance array is set at the correct direction
(mark is inside) in the single line socket on the main unit: For the
daisy chain connection; resistance array can be only installed into
one of the (four) drives.
Tbe disk drive with the resistance array instal1ed must be charged
with current in order to operate any of the drives.
4.1.2 Function of input signals
(1)
Drive select
0" 3 (080 ,...
OS)}
A
ll\axilnum of four
S1-10-100
sel."'ies (low power consumption) disk drives
can be connected in
a
daisy chain configuration. Selection of the drive
numbers is performed by
SSl
of the DIe connector on the main
PCB.
When
this switch is operated, only the signals from the selected drives will
be input.
At
the position
MX,
drive is selected no matter
~hat
state of
drive select
sigIlai.
8