4 www.honeywell.com
NetAXS™ NX4S1 Installation
Notices
1.6  Underwriters Laboratories Incorporated
The NetAXS™ panel was reviewed by Underwriters Laboratories Incorporated for 
Access Control System Units - Category ALVY, UL294 standard. The NetAXS™ 
panel was reviewed as a stand alone system. The input points only monitor the door 
position. The NetAXS™ panel is not intended as a Proprietary Alarm Unit - Category 
APOU, UL1076 standard. 
The NetAXS™ panel was reviewed using the following Honeywell readers: 
OmniAssure (TM) OT30, OmniClass (TM) OM40 and OM55, and OmniProx (TM) 
OP30 and OP40.
Notes:
• All field wiring, except the battery backup/charger wiring, is Class 2 
power-limited.
• UL has not evaluated communication with panels that are not NetAXS™ 
panels.
• Underwriters Laboratories (UL) has reviewed only the configurations shown 
in “RS-485 Connection via PCI-2“ on page 26, “RS-485 Connection via 
NetAXS™“ on page 27, and “RS-232 Connection“ on page 30 of this guide. 
Because UL has reviewed the NetAXS™ panel only as a standalone system, 
the computer terminal, NetAXS™ gateway panel, and N-485_PCI-2 adapter 
appear in these sections only to illustrate the installation and programming of 
the NetAXS™ panel.
• UL has not evaluated the compatibility of downstream I/O devices (see 
“Downstream I/O“ on page 23) with the NetAXS™ panel.