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Installing the MPA2 Panels
System Configuration
4.3 RS-485 Loop Connection via MPA2
This loop connection supports a total of 31 MPA2 panels (including the
Primary) for each drop line.
Figure 14: RS-485 Loop Connection via MPA2
Note: You should ground each MPA2 Standard (Metal) Enclosure panel
individually with an Earth Ground.
DIP Switch Settings
S1-S5: Panel Address
S6: OFF
S7: OFF
S8-S9: ON: 485 Termination ON
Only Earth Ground (EG) one side of cable
RS-485 Cable (RJ45)
4,000 ft (1,200 m) max. 24 AWG, 2 twisted
pairs with shield, 120 ohm, 23 pf (HAS part
no. NCP2441-TN) or CAT 7 S/FTP Cable
DIP Switch Settings
SW 5-9: Panel Address
SW3: ON : Primary
SW4: OFF
S1 7-8: ON : 485 Termination ON
See RS-485
Cable note
DIP Switch Settings
SW 5-9: Panel Address
SW3: OFF : Secondary
SW4: OFF
S1 7-8: OFF : 485 Termination OFF
Terminal
Ethernet RS-485 (4000 Ft. Max.)
Refer to MPA2 Panel Connection
Detail diagram
EG
EG
EG
EG
NetAXS-123
Panel
MPA2
Panel
MPA2
Primary
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