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Installation
February 2019
3.2
Installation overview
This section describes how to properly mount the Gateway and make electrical
connections, including wiring, grounding, and host system connections.
General considerations
The unit itself is not designed for outdoor mounting without a suitable enclosure. The
Gateway should be mounted in an approved electrical enclosure or building.
The Gateway should be mounted in a location that allows convenient access to the host
system network (process control network) as well as the wireless field device network and
protects the Gateway from moisture and contamination. It is also best practice to install
the 781 Field Links centrally in the network for the most direct connections for the
Gateway.
Physical description
The Gateway electronics is enclosed in a polymer housing. The front of the enclosure has
connections for power, Ethernet, and serial communications. The unit is designed to be
mounted on a DIN rail inside an electronic enclosure.
3.3
Installing the Gateway
3.3.1
Power
The Gateway is designed to be powered by 24 VDC (nominal) Class 2 supply and requires
250 mA of current per network. Both networks can be powered by the same input power
using the combined terminal block provided in the Gateway box. The combined input
power should be 24 VDC with 500mA of current per network. Both networks can be
powered by the same input power using the combined terminal block provided in the
Gateway box. The combined input power should be 24 VDC with 500mA of current.
The wiring should include an external power shut-off switch or circuit breaker that is
located near the Gateway.
The terminals on this connector can accommodate wires from 24 AWG to 12 AWG. Use of
18 AWG wire is recommended. Tighten screws to 4.4 to 5.3 l bf-in (0.5 to 0.6 Nm).
In ambient temperatures greater than +60 °C use wire rated for at least 5 °K above the
maximum ambient temperature.
Note
Using an uninterruptible power supply (UPS) is recommended to ensure availability during
power failure.
3.3.2
Mounting the Gateway
The unit can be snapped onto a DIN TS35/7.5 or TS35/15 rail system.
Procedure
1. Push the DIN rail lever downwards so the spring compresses, and hold.
20
Reference Manual
00809-0500-4410
Emerson.com/Rosemount
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