Marathon Computer AACC 2000 - Manual (Page 20)

Marathon Monitors Inc.
AACC 2000 Carbon Nov. 1, 1997
20
Communication module 1
The Models AACC 2000 will accept a plug-in communications modules.
The possible module types are shown in the table below.
The serial communications can be configured for either Modbus, or MMI protocol.
Communications module 1 Terminal identity (COMMS 1)
Module type HA HB HC HD HE HF
2-wire EIA-485 serial
communications
− − −
Common A (-) B (+)
EIA-232 serial communications
− − −
Common Rx Tx
Table 1-3 Communication module 1 connections