Service manual

Document # 720000-0000
May 2008
12
EZ LOAD PRINTER
Service
Manual
3.2 Pin designation of Communication Interfaces
3.2.1 RS-232 (DB-9)
Pin Signal Name Printer I/O Host I/O Printer Function
1 n/a
always driven low
(high on RS232 side) Input None
2 PRT_RS232_TXD Output Input Data transmit
3 PRT_RS232_RXD Input Output Data receive
4 n/a No connect Output None
5 Signal Ground Signal Ground Signal Ground Signal Ground
6 RS232_DSR Output Input
Printer Ready
(Connected to
PRT_RS232_RTS Pin 8)
7
PRT_RS232_CTS
(host RTS) Input Output Handshake
8
PRT_RS232_RTS
(host CTS)
Output Input Handshake
9 n/a
always driven high
(low on RS232 side) Input None
Shell Frame Ground Frame Ground Frame Ground Shield
Table 5: 9 Pin RS232 serial interface
3.2.2 Metri Mate (25 pin)
Pin Signal Name Printer I/O Host I/O Printer Function
1-7 NC NC NC NC
8 Frame Ground Frame Ground Frame Ground Frame Ground
9 PRT_RS232_RXD Input Output Data receive
10 RS232_DSR NC Loop to DTR
11 NC NC NC NC
12 24 VDC 24 VDC 24 VDC Power 24VDC
13 Digital Ground Digital Ground Digital Ground Digital Ground
14 Signal Ground Signal Ground Signal Ground Signal Ground
15-16 NC NC NC NC
17 PRT_RS232_TXD Output Input Data transmit
18 RS232_DTR NC Loop to DSR
19-25 NC NC NC NC
Table 6: 25 Pin Metri mate interface