Intermec EasyCoder 501 - Straps

Intermec EasyCoder 501 – Service Manual Ed. 7
172
Chapter 22 Parallel Interface Board
22.2 Straps
1
/. A jumper must be fi tted on either
S-2 or S-3!
Three different straps can be fi tted on the Parallel Interface Board:
External +5V
Jumper fi tted on connector P-2 enables external +5V (max. 200
mA) on pin 18.
Caution! Be careful not to enable the external +5V unintentionally,
which may cause harm to the terminal, computer, or other device
connected to this port!
Busy Signal
S-1: Jumper fi tted = BUSY signal ON until end of ACK
signal.
No jumper fi tted = ACK after BUSY signal (as on previ-
ous versions of this board).
S-2/3
1
: Jumper fi tted on S-2 = BUSY signal on falling edge of
/STROBE signal (that is, according to specifi cations).
Jumper fi tted on S-3 = BUSY signal on rising edge of
/STROBE signal (that is, as on previous versions of this
board).
P-2
Female
Centronics
Connector
P2
S1
S3
S2
S-1
S-2, S-3