APG Cash Drawer Model 212A Smart SerialPRO - Manual (Page 3)

III. Jumper and Switch Setup
The 212A Smart SerialPRO® Interface does not require hardware handshaking for proper operation. Any hardware
handshaking that the host requires for peripheral devices is accomplished directly on the interface board with pin jumpers,
which can be reconfigured for specific requirements. The cash drawer comes equipped with a drawer status switch, which
can be used to signal the host whether the drawer is opened or closed. Pin jumpers on the interface board select the serial
port status line that reports drawer status. Three (3) sets of DIP switches are located on the bottom of the cash drawer,
next to the connector for the interface cable. These switches configure the opening characters and the serial port
operation. It is not necessary to remove power when changing the dip switch settings.
A. Jumper Settings
Figure 1
Factory Default Setting
Jumper block J1 configures the DSR-DTR-DCD hardware handshaking. The cash drawer is configured at the factory for
full DTR handshaking. In special circumstances where hardware handshaking is not needed or desired, the appropriate
jumpers can be removed from the interface board. When sharing the same serial port with other devices, we recommend
that one of the other devices controls hardware handshaking and the jumpers on the interface should be removed.
Remove the left jumper on J1 to disconnect DSR-DTR handshaking. Remove the right jumper on J1 to disconnect DTR-
DCD handshaking. Remove all jumpers on J1 to disable DTR handshaking as shown in Figure 2.
Figure 2
Jumper block J2 configures the RTS-CTS hardware handshaking and allows for reporting of cash drawer status. Unless
otherwise specified, the drawer is configured with the status switch disabled at the factory, and RTS-CTS handshaking
enabled.
To disable the Return To Send (RTS) and Clear To Send hardware handshaking, remove the jumper over the right two
pins, as shown in Figure 3.
The cash drawer can be configured to report the opened/closed status on the Clear To Send (CTS) line, pin 5 on a 25 pin
port, as shown in Figure 4. Note that RTS-CTS handshaking will be disabled.
The cash drawer can be configured to report the opened/closed status on the Ring Indicator (RI) line, pin 22 on a 25 pin
port, as shown in Figure 5.
Figure 3 Figure 4 Figure 5
When the cash drawer is closed, the switch status line is electrically high, and when the drawer is open, the status line is
electrically low.