of the slot, or sliding the card upward from the lower side of the slot till it reaches the top end as long as the card is a standard one. A
The MSR indicator will light up in green when the MSR is ready to read, blink during reading, and then give a green light if the reading is successful. The MSR indicator will turn to be red if the reading fails due to improper sliding or poor magnetic intensity of the magnetic stripe, the MSR indicator will then turn back to green when the MSR is again ready to read.
FRONT DOOR
At the front of the programmable keyboard there is a door with a mechanical lock to the right of it. Turning the key clockwise will release the front door lock, the door may be fully opened by hand then. This lock also physically locks the programmable keyboard subassembly housing to the chassis of the main unit, which prevents unauthorized access to the internal electronics. There are the external PC keyboard connector and the optional 1.44MB 3.5” Floppy Disk Drive (FDD) behind the door.
EXTERNAL PC KEYBOARD
From time to time it will be necessary or more convenient to use a standard PC keyboard. This may be to reprogram the PST keyboard key definitions, or to alter some aspects of either the DOS operating system or the application program. The PC keyboard may be plugged into the 5 pin DIN socket behind the front door.
This socket may also be used to trial a new device that is required to be daisy chained to the keyboard port (e.g. a table scanner). Please keep in mind the previously mentioned limit of 5 devices.
3.5” FDD
This option is a regular PC device, it accepts any 3.5” floppy diskette formatted to 1.44 MB or 720 KB.
REAR ROOM
The terminal has a rear room that covers the signal and power connector area and is designed to provide a tidy and secure termination for all cables into and out of the terminal. Cables may be secured by attaching them with cable ties to the lattice base of the compartment.
Access to the rear room is gained by releas ing the rear door latches. These are located under the lower edge of the door at either side of the door. They may be located by “feeling the ridges” on the latch, sliding both latches to the center of the door will release the door. These latches are intentionally stiff.
Part 19
