Pason WITS - About WITS Port Pin-Outs; COMM022 RS232 Pin-Outs; Figure 17: COMM022 RS232 Pin-Outs; RS232 Port Pin-Outs

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Revised May 1, 2019

Revision 25 of DOCU225, © Copyright

Page 42 of 44

5 About WITS Port Pin-Outs

This section contains pin-outs to guide you as you design a product interface that is

compatible with the Pason system. Consult the information below if you are connecting a

third-party device that uses RS232 or RS422 communications.

5.1 RS232 Port Pin-Outs

Pason provides two communications boxes for use by third parties interested in setting

up WITS communications between an RS232 device and the EDR system: COMM022

and COMM018. Both of these comm boxes convert RS232 to RS422, which the EDR

can accept.

COMM022 RS232 Pin-Outs

COMM022 provides a DB9 connector on the third-party side. The table below lists pins

and descriptions for the COMM022 pin-outs:

DB9 Pin Description

2 TX

3 RX

GND

all other pins unused

Figure 17: COMM022 RS232 pin-outs