HP Point of Sale (POS) Peripherals Configuration Guide

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6.5.13 Receipt Printer Cash Drawer Signal
6.5.13.1 Cash Drawer Signal
The cash drawer is attached to the back of the printer using an RJ12 or similar
connector (the smaller connector). On HP cash drawers, this connector sends a
HIGH signal from the printer to open the cash drawer. The HIGH signal is the
default setting for the HP OPOS receipt printer drivers installation.
However, there are other cash drawers that may be using an opposite LOW signal
to open the cash drawer. In this case, a user may need to configure the driver to
also send a low signal in order for the cash drawer to open correctly (steps provided
later). If the user has tried both settings and the cash drawer is still not opening, a
different cash drawer cable may be needed. Check with the cash drawer vendor or
the cash drawer vendor’s documentation in regards to the LOW and HIGH signal
setting.
6.5.13.2 Cash Drawer Signal Change
The registry files needed to change the cash drawer signal option are included in
the HP factory image in C:\xxxxx\Point of Sale\Receipt Printer\Cash Drawer Signal:
• “HP Default Cash Drawer Signal.REG”
Changes the cash drawer registry value to HIGH which is the default
value when the OPOS drivers are installed and the value that is need
when the HP cash drawer is attached to the HP Receipt printer.
• “HP Non-Default Cash Drawer Signal.REG”
Changes the cash drawer registry value to LOW which may be tried
for a non-HP cash drawer if default HIGH option does not open the
cash drawer.
You must have administrator right in order to make the change. When you double
click on the file you will receive a prompt for confirmation that you want to make the
changes.
If you click YES then you will receive a confirmation that the change was made.
In order to test the signal cash, please refer to the cash drawer test section (OPOS
Test Applet for the Cash Drawer) of this guide.