Specifications

Programmer’s Guide POSjet
®
1500 Features/Specifications
Nov-10 Rev N 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