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:
Ex5V
Jumper fi tted on connector P-2 enables ex5V (max. 200
mA) on pin 18.
Caution! Be careful not to enable the ex5V 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