Straps - UBI EasyCoder 501 Service Manual

UBI EasyCoder 501 – Service Manual
22. PARALLEL INTERFACE BOARD, cont'd.
22.2

Straps

1
/. A jumper must be fitted on either S-2 or
S-3!
Female
Centronics
Connector
S-1
S-2, S-3
Three different straps can be fitted on the Parallel Interface Board:
External +5V
Jumper fitted on connector P-2 enables external +5V (max. 200
mA) on pin 18.
Warning! Be careful not to enable the external +5V unintention-
ally, which may cause harm to the terminal, computer or other
device connected to this port!
Busy Signal
S-1: Jumper fitted =
No jumper fitted =
versions of this board).
1
S-2/3 : Jumper fitted on S-2 =
/STROBE
Jumper fitted on S-3 =
/STROBE
P-2
P2
S1
S3 S2
signal ON until end of
BUSY
after
ACK BUSY
BUSY
signal (i.e. according to specifications).
BUSY
signal (i.e. as on previous versions of this board).
signal.
ACK
signal (as on previous
signal on falling edge of
signal on rising edge of
159