Posiflex PD-2300 - Manual (Page 11)

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IV. INSTALLATION
A. Connector area
In base of stand alone models, looking from rear side of the bottom, the
connector area will look like below:
For serial (RS232) interface models:
For USB interface models:
B. Signal connection
1. For RS232 interface stand alone models
1. With all power off, connect the male connector of interface cable to
“RS232 In” in connector area and the female end to COM port of the
host.
12 V AC In
+24 V DC In
+24 V DC Out
RS232 In
VFD
RS232 Out
USB
HOST PD2300 POS printer
RS232 RS232 Out RS232 In COM port