Connect To The Host System - Emerson Smart Wireless Gateway 1420 Quick Start Manual

January 2015

Step 3: Connect to the host system

1. Wire the Gateway's Ethernet 1 (Primary) or Serial Output connection to the

Host System Network or Serial I/O.

2. For Serial connections, connect A to A, B to B, making sure all terminations are

clean and secured to avoid wiring connection problems.

Figure 7. Smart Wireless Gateway Terminal Block Diagram

24 VDC

(nominal)

Power Input

+

Case

Ethernet 2

with Power

(Covered)

Do not connect the Host System to the Ethernet 2 with power (covered) port on the Smart

Wireless Gateway to avoid damaging the system.

Best practice

In accordance with Emerson WirelessHART

should be connected to the Host System via a LAN (Local Area Network) and not a

WAN (Wide Area Network).

Twisted shielded pair cable is generally used to wire the Serial connection, and it is

standard practice to ground the shield on the Serial Host side leaving the shield

floating on the Gateway side. To avoid grounding issues be sure to insulate the shield.

Power

Wire a 24 VDC (nominal) power source, with at least 250 mA of current, to the

power terminals using the Smart Wireless Gateway Terminal Block Diagram

shown in

Figure

S

-

A

Ethernet 2

Ethernet 1

(Secondary)

(Primary)

7.

Serial

Modbus

Not Used

+

B

+

Not Used

®

security guidelines, the Gateway

Quick Start Guide

Not Used

-

S

S

-

-

S

S

-

Not Used

+

+

15