Programmer’s Guide
POSjet
®
1500
Features/Specifications
Nov-07
Rev M
Page 7
Parallel Signal Voltage and Current levels
Signal Levels
Voltage levels
0 V and +5 V (nominal)
Logic levels
Logic one
Driver
+2.4 V to +5 V
Receiver
+2.0 V to +5 V
Logic zero
Driver
0 V to +0.4 V
Receiver
0 V to +0.8 V
Current requirements
Logic one
Source
0.25 ma at +2.4 V
Logic zero
Sink
16
ma
Line termination
Data and control
3.3k ohm to +5 V
Strobe
1.2k ohm to +5 V
RS-232 Serial Interface
There are two serial interface cards available. One is a 9-pin, D-shell connector. The pin-out is such that the printer
interfaces to a standard IBM PC Serial printer interface with a Serial Null Modem cable. The second interface card
provides the same interface with a standard 25-pin D-shell connector. Both interface cards provide a dual cash
drawer interface. The tables below lists interface signals and pin definitions for both types of serial interfaces.
Serial Port Features
Baud Rates
300, 600, 1200, 2400, 4800, 9600, 19.2K, 38.4K, and 57.6K
Bit Patterns
8-bit no parity; 8-bit odd; 8-bit even; 7-bit no parity; 7-bit odd; 7-bit even
Flow Control
DTR and XON/XOFF
Serial Pin Assignments
9-pin
25-pin
Signal
Description
Pin 1
Pin 8
N/C
No Connection
Pin 2
Pin 3
RX
Receive Data
Pin 3
Pin 2
TX
Transmit Data
Pin 4
Pin 20
DTR
Data Terminal Ready
Pin 5
Pin 7
GND
Signal Ground
Pin 6
Pin 6
DSR
Data Set Ready
Pin 7
Pin 4
RTS
Request to Send
Pin 8
Pin 5
CTS
Clear to Send
Pin 9
Pin 11
N/C
No Connection
Table 2 Serial Interface Pin Assignments
Summary of Contents for POSJET 1500
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