Honeywell 5704 Operating Instructions Manual page 33

MAN0448_Issue 13_01-2010
005704-M-5001 A03249
CHAPTER 2 - SySTEM DESCRIPTION
One of four optional modules may be fitted to the Engineering Card:
a. Master Alarm Update Module
This facility provides an indication when a new alarm occurs on
any channel in the rack, even if a previous alarm condition already
exists.
b. Event Printing Module
This facility provides time stamped reporting of alarm and fault
events as they occur and system status at predetermined regular
intervals.
c. Modbus Interface Module RS422/485
This facility provides for digital communication between the
System 57 Control System and an external computer system using
the RS422/485 serial data format and the Modbus communication
protocol.
d. Modbus Interface Module RS232
This facility provides for digital communication between the System 57
Control System and an external computer system using the RS232
serial data format and the Modbus communication protocol.
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5704 Control System