23
Reference Manual
00809-0200-4410, Rev BA
Section 3: Mounting and connection
February 2014
Mounting and connection
Figure 3-5. Emerson Smart Wireless Gateway 1410 Terminal Block Diagram
A. 5 screw terminal block.
Ethernet connections should use Cat5e shielded cable to connect to an Ethernet hub, switch, or
router. The maximum cable length should not exceed 328 ft. (100 m).
3.4.3
RS-485
The Gateway can be ordered with an optional RS-485 (serial) connection (
Figure 3-6 on
page 24
). Modbus terminals are labeled A and B on the wiring diagram. This connection is used
to communicate Modbus RTU on an RS-485 data bus.
Use 18 AWG single twisted shielded pair wiring to connect the Gateway to the RS-485 data bus.
The total bus length should not exceed 4000 ft. (1220 m). Connect the Tx - (negative, receive)
wire to terminal A and the Rx + (positive, transmit) wire to terminal B. The wiring shield should
be trimmed close and insulated from touching the Gateway enclosure or other terminations.
If the existing data bus uses a 4 wire Full Duplex configuration, see
Figure 3-6
to convert to a
2-wire Half Duplex configuration.
+
-
A
B
24 VDC
(nominal)
Power Input
Serial
Modbus
S
Power
Reset
A
