NetAXS™ NX4L1 Installation Guide
System Configuration
NetAXS™ NX4L1 Access Control Unit Installation Guide, Document 7-901099V3 51
5.9 RS-232 Short Haul Modem Connection
This connection supports one NetAXS Access Controller panel for each loop. It has not been approved
by UL.
Figure 27: RS-232 Short Haul Modem Connection
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
(DEC/DTE)
DN
DIS
RTSIDTR
CONTROL
RX +
RX -
TX +
TX -
GROUND
DN
DIS
RTSIDTR
CONTROL
(S2 Loopback)
(S2 Loopback)
(J1 RS-232 Connector)
(DEC/DTE)
SHM-B-ASYNCH
Short Haul Modem
5279.9 ft.
NetAXS
Panel
EG
DIP Switch Settings
S1-S5 Panel Address
S6: OFF
It is recommended to
Earth Ground (EG) each
NetAXS enclosure
individually
(RS-232 50 ft. max.)
Male 9 Pin Male 25 Pin
CBL50
Terminal
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