Honeywell LonWorks - Page 2

100 mm
(2.54 in.)
130 mm
22.2 mm
58.5 mm
(2.303 in.)
43.5 mm
(1.71 in.)
Ø 12.70 mm
(0.50 in.)
Clearance needed below Midas for tubing and cables.
Mounting Template
LonMark Object Diagram
See Tech Note 1998-0643 for details.
MIDAS LonWorks Device
Open-loop sensor Functional Block
nviReset
SNVT_lev_disc
nvoConc
SNVT_ppm_f
nv1
nvoFaultD
SNVT_lev_disc
nvoFaultS
SNVT_switch
nvoAlm2
SNVT_lev_disc
nvoAlmL
SNVT_lev_disc
nvoAlmThresh1
SNVT_ppm_f
nvoAlmThresh2
SNVT_ppm_f
nvoCellLife
SNVT_elapsed_tm
nviRelay1
SNVT_lev_disc
nviRelay2
SNVT_lev_disc
nviRelay3
SNVT_lev_disc
nvoAlmS
SNVT_switch
nvoGasSelection
SNVT_count
Mandatory
Implementation-Specific
nvoMonState
SNVT_state
nvoNstat
SNVT_state
Virtual Function Block
nciMaxSendT
SNVT_elapsed_tm
cp22
nciMinSendT
SNVT_elapsed_tm
cp24
Node Object Functional Block
nvoStatus
SNVT_obj_status
nv2
nviRequest
SNVT_obj_request
nv1
nvoChkSum
SNVT_count
nv3
Mandatory
Implementation-Specific
Wiring Diagram
Plug 2
Plug 1
Pwr +24 VDC
Lon A
Lon B
Pwr Common
Pwr +24 VDC
Lon A
Lon B
Pwr Common
Wiring Notes:
Maximum wire size is 1.5 mm (16AWG)
Input voltage range is 21.6 to 26.4 VDC.
It is mechanically possible to misalign Plug 1 and Plug 2. Care should be taken when
inserting plug to assure correct alignment.
Plug 1 and Plug 2 are internally connected in parallel to facilitate wiring in bus topology.
LonWorks FT-10 wiring is polarity-insensitive. Lon A and Lon B may be swapped.
Note:
The Midas
®
LonWorks
®
interface draws approx 1.7 amps for approx 100 mS after power is applied.
External equipment should be sized appropriately. Additionally, the Midas
®
requires the supplied power
to rise to the minimum specification (21.6 VDC) within 500mS.
i)
ii)
iii)
iv)
v)
Power Consumption:
Transmitter unit < 5 W
Transmitter with pyrolyzer (std or HTP) < 12.95 W
Transmitter with LonWorks Module < 8 W
Transmitter with LonWorks and pyrolyzer < 15.95 W