HE693SNP232R Horner APG’s SNP to RS232 Adapter 

The HE693SNP232 SNP to RS-232 Adapter is equipped with two ports. The 15-pin “SNP” port plugs
directly into the PLC Programmer Port on the CPU rack power supply. Power to the SNP Adapter is
supplied directly from the programming port (maximum 100mA@5VDC). The 9-pin RS-232 port connects
to any RS-232 device. The “pinout” for the HE693SNP232 Adapter serial ports are defined below. The
direction indicated is with respect to the adapter.

This pinout was chosen to allow direct connection (using a straight through, or 1 to 1 cable) to the IBM
PC/AT. Nearly ALL of the IBM compatible computers equipped with a 9-pin RS232 port will provide a
pinout compatible with that shown above.

When connecting the SNP adapter to IBM compatible PCs with hardware handshaking, the following
cable interface should be used.

HE693SNP306AX

The XT Adapter can be used on an IBM compatible PC, which has a 25-pin RS232 port. The internal
wiring of the XT Adapter is show below.

The HE693SNP232 SNP to RS-232 Adapter comes with two ports. The 15-pin “SNP” port connects

directly into the PLC Programmer Port on the CPU rack power supply. Power to the SNP Adapter is

provided by the programming port (maximum 100mA@5VDC). The 9-pin RS-232 port connects to any

RS-232 device. The “pinout” for the HE693SNP232 Adapter serial ports are defined below. The direction indicated is with respect to the adapter.

Technical Specifications

Table 1 – 15-pin Port