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NetAXS™ NX4L1 Installation Guide
System Configuration
5.8 RS-485 Short Haul Modem Connection via NetAXS
This connection supports 31 NetAXS Access Controller panels for each drop line. It has not been
approved by UL.
Figure 26: RS-485 Short Haul Modem Connection via NetAXS
RS-232, 50 ft. max.
RS232 Cable MODEM
PC DTE DCE
(DB-9) (Straight) (Null)
2 TX 2 (TX) 2 (RX)
3 RX 3 (RX) or 3 (TX)
5 Comm 7 (GND) 7 (GND)
RS232 Cable MODEM
PC DTE DCE
(DB-9) (Straight) (Null)
2 TX 2 (TX) 2 (RX)
3 RX 3 (RX) or 3 (TX)
5 Comm 7 (GND) 7 (GND)
SHM-B-ASYNCH
Short Haul Modem
DN
DIS
RTSIDTR
CONTROL
RX +
RX -
TX +
TX -
GROUND
DN
DIS
RTSIDTR
CONTROL
(S2 Loopback)
(S2 Loopback)
(J1 RS-232 Connector)
SHM-B-ASYNCH
Short Haul Modem
5279.9 ft.
NetAXS
Panel
EG
NetAXS
Panel
EG
NetAXS
Panel
It is recommended to Earth Ground (EG) each
NetAXS enclosure individually
(RS-232 50 ft. max.)
Male 9 Pin Male 25 Pin
EG
EG
Only Earth Ground (EG)
one side of cable
See RS-485
cable note
DIP Switch Settings
S1-S5 Panel Address
S6: OFF
J36: OPEN
J37: OPEN
DIP Switch Settings
S1-S5 Panel Address
S6: OFF
J36: CLOSED
J37: CLOSED
DIP Switch Settings
S1-S5 Panel Address
S6: ON
J36: CLOSED
J37: CLOSED
RS-485 Cable
NetAXS Panels
TB7-1 (RS485+)
TB7-2 (RS485-)
TB7-3 (RS485 COM)
4,000 ft. (1,200 m) max, 24 AWG, 2 twisted pairs with
shield, 120 ohm, 23 pf (HAS part no. NCP2441-TN)
CBL50
Terminal
Summary of Contents for NETAXS NX4L1
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