KROHNE Summit 8800 Vol 1 - Manual (Page 42)

42 www.krohne.com 08/2013 - MA SUMMIT 8800 Vol1 R02 en
SUMMIT 8800 HARDWARE DETAILS 05
5 .4 .3 Serial Communication Connection
A serial port is available on all I/O boards and terminal connections are universal for digitals,
analogue and switch I/O boards.
Figure 30 Serial port I/O boards rear terminal pin allocation
5 .5 Digital I/O Board
The digital I/O board 1 can only be exchanged by qualified personnel. Up to a maximum of 6
cards can be inserted in any of the plug in slots in the SUMMIT 8800 chassis. A board can provide
input and output functions as detailed:
• 3 pulse counting/frequency measuring inputs (for use with turbine meters, rotary meters,
density or relative density transducers).
• 2 digital status inputs for use with switch or contact inputs.
• 2 Smart transmitter (HART) loops. Each loop can provide connections for up to 3 transmitters
each with four variables such as pressure, temperature or differential pressure transmitters.
• 1 Direct 4 wire RTD input for direct measurement of temperature.
• 5 digital transistor switched outputs for use in telemetry systems or for alarm indication.
• 2 analog 4-20 mA outputs for use in telemetry or control systems.
• 1 Serial communication port using either (RS232 or half duplex RS485), providing connection
to gas meters, gas chromatographs or other equipment that transfers data via serial commu-
nication.