NCR 7454 Hardware User's Manual page 30

1-18 Chapter 1: Product Overview
Cash Drawer I/O Port Bit Definition:
Bit # Description
7 Solenoid B Control
6 Solenoid A Control
5 Reserved
4 Reserved
3 Solenoid B Status
2 Solenoid A Status
1 Reserved
0 Cash Drawer(s) Status Drawer(s) open
Note: Bits 2 and 3 are set to '1' by each device reset.
The cash drawer interface can be diagnosed remotely. For security
reasons, the cash drawer diagnostics mode must first be activated by
pressing an external momentary switch (SW2). The intention is for
authorized personnel to be present when the cash drawer diagnostic
tests take place.
There is only one cash drawer status signal; therefore, bit 0 is the status
of either cash drawer or both cash drawers.
Bit = 1
Turns off solenoid
output
Turns off solenoid
output
Reserved
Reserved
Solenoid B output
active
Solenoid A output
active
Reserved
Bit = 0
Activates solenoid
output
Activates solenoid
output
Reserved
Reserved
Solenoid B output
inactive
Solenoid A output
inactive
Reserved
Drawer(s) closed