Options (lonworks, btl certified bacnet), Field retrofit installation – Nortec BACnet User Manual
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BACnet & LONWORKS Supplemental Install Manual | 14
Options (Lonworks, BTL Certified BACnet)
Nortec offers additional protocol options that may be purchased if required. Both field and 
factory installed versions are available and include Lonworks and BTL
®
(BACnet Testing Lab)
1
certified BACnet. See
for specific part numbers and details.
Table 6: Optional Factory Installed Part Numbers
Part 
Number 
Kit Name
Kit Description
2574194
Lonworks, NH-EL
Factory installed option for Echelon’s LonWorks 
protocol 
2574193
BACnet MSTP, BTL Certified, NH-EL
Factory installed option for BTL approved protocol for 
BACnet MSTP 
2574192
BACnet IP, BTL Certified, NH-EL
Factory installed option for BTL approved protocol for 
BACnet IP 
Table 7: Optional Field Install Part Numbers
Part 
Number 
Kit Name
Kit Description
2574197
Lonworks, NH-EL , Retrofit
Field install option for Echelon’s LonWorks protocol
2574196
BACnet MSTP, BTL , NH-EL Retrofit
Field install option for BTL approved protocol for BACnet 
MSTP 
2574195
BACnet IP, BTL, NH-EL Retrofit
Field install option for BTL approved protocol for BACnet 
IP 
Field Retrofit Installation
The kits consist of a single interface card that is mounted on the rear side of the integrated 
controller. Care should be taken with installation the optional unit in the field. Users will need to 
install the interface card onto the pins as shown in 
Figure 8: BACnet Specific Port
and
Figure 9: LonWorks Specific Port
location of each port for the respective protocol.
1
BTL is a registered trademark of BACnet International (BI)
