Hand Held Terminal Expansion Board; Connecting The Hht Adapter Board; Hht Home Screen - Emerson Control Link Installation And Operation Manual

8.3. Hand Held Terminal
Expansion Board

Hand Held Terminal Expansion Board

Figure 8-2 -
With the 814-3112 Hand-Held Terminal and the
536-3120 Adapter Board, you can access the ACC via
its MODBUS communication port without having to
use the site controller. The Hand-Held Terminal
interface allows you to perform these general
functions:
• View failure messages that relate to the ACC
• View the status of inputs
• View the output percentage ON
• Override the outputs to a fixed percentage
• Make temporary or permanent changes to set points.
If also connected to a site controller, any changes
will be overwritten
An ACC HHT will also have these specific
functions:
• It can issue a command to switch the MODBUS port
into a dumb HHT port to view and set ACC
information like a standard HHT
• It can be used to update firmware for the attached
ACC
22 • Control Link ACC I&O Manual
8.4. Connecting the HHT
Adapter Board
The HHT Adapter Board is connected on the low
voltage end of the ACC using a standard Belden 8761
cable (shown in Figure 8-3). The Hand-Held
Terminal plugs into the RJ11 jack on the HHT
Adapter Board. Press the Hand-Held Terminal
connector into the jack until it snaps into place. When
the connector is correctly seated, and the HHT is
powered up in Battery or External Power Position the
user will see the Home screen of the HHT.

8.4.1. HHT Home Screen

ECT HHT: <S/W>
814 - 3112
VER: 1.00F01-01
(PRESS )
If the ACC is connected to an E2 network, the
network connection needs to be removed.
Figure 8-3 - HHT Adaptor Board Connection to the ACC
026-4704 Rev 6