MagTek MAXI MICR RS232 - Manual (Page 53)

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APPENDIX D. PINPAD INTERFACE TO MICR READER
The PINPad device connects to the 4-pin RJ socket on the MICR Reader. This socket is referred
to as the PINPad port. This port uses the RS232 protocol at TTL voltage levels with settings
fixed at 300 baud rate, 7 data bits and odd parity.
In a typical connection, the PINpad connects to the MICR Reader, and the MICR Reader
connects to the Host. The MICR Reader serves as a communication bridge between Host and
PINPad. It should be noted that the MICR Reader simply directs the data flow from the Host to
the PINPad (and vice versa) and is never responsible for the PINPad operation. At all times, the
Host is responsible for the control of the PINPad operation.
Connect the PINPad to the RJ socket on the MICR Reader. The RJ socket is shown in Figure
D-1, and the pin descriptions are listed in Table D-1.
To communicate with the PINPad through the MICR Reader, all PINPad commands from the
Host must be in the following format:
<STX>[PINPad Command]<ETX>
When the MICR Reader receives commands for the PINPad, the MICR Reader just passes the
commands along to the PINPad.
In the same manner all PINPad data to the Host will be in the following format:
<STX>[PINPad Data]<ETX>
For further information on PINPad operation refer to the following documents:
•
Encrypting PINPad Specification, Part Number 99815042
•
Nonencrypting PINPad Technical Description, Part Number 99833004
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Figure D-1. PINPad RJ Socket