Honeywell HC900 User Manual

Pre-Installation Planning - Electrical Considerations 

42 

  HC900 Hybrid Controller Installation and User Guide 

Revision 5 

  

9/03 

Controller rack connected via two 
Ethernet Hubs to I/O expansion 
racks (C50 CPU only) 

Length of Ethernet cable, each 
segment: 328 feet (100 meters). 

 

Note:  The use of Ethernet cables in excess of 100 meters and/or devices other than approved Hubs 
(2 Maximum) will cause transmission delays that could have adverse affects on Controller performance. 

It is advantageous to minimize length of I/O wiring.  However, it is also a good idea to locate racks (and 
wiring) away from adverse environmental conditions such as sources of RFI, EMI, and away from areas 
with high levels of moisture, dust, and corrosive materials. 

The HC900 Controller should be mounted in an appropriate metal enclosure.  A diagram that shows 
recommended wiring practice for the cabinet enclosure is given in Figure 20 - Cabinet Wiring, Single 
Chassis, and Figure 21 - Cabinet Wiring, Multiple Chassis.   

Deviations from the installation conditions specified in this manual may invalidate this product's 
conformity with Low Voltage and EMC Directives. 

 

 

Hazardous voltages exist in the equipment enclosure. 
•  Identify and avoid contact with voltage sources. 
Failure to comply with these instructions could result in death or serious injury. 

PROTECTIVE BONDING (grounding) of this controller and the enclosure in which it is installed shall be 
in accordance with National Electrical Code (ANSI/NFPA 70) and with local electrical codes.