Honeywell HC900 Reference Guide

Function Blocks
ENTH Humidity and Enthalpy Function Block
154 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
Example
Calculate enthalpy (0 – 100 btu/lb) and absolute humidity (0 to 100 lb/lb) as a function of air temperature,
relative air humidity, and air pressure.
Figure 36 ENTH function block example

Honeywell HC900 Specifications

General

Series	HC900
Redundancy	Optional
Programming Language	Function Block Diagram, Ladder Logic, Structured Text
Inputs	Analog, Digital
Outputs	Analog, Digital, Relay
Display	Optional
Control	PID, Advanced Control
Power Supply	24V DC or 100-240V AC
Storage Temperature	-40°C to 85°C
Humidity	5% to 95% non-condensing
Communication Protocols	Modbus, Ethernet