X20105 Components and Spares | Automation Control System

9 Channel HMI

D/A Signal Controller System Installation & User Manual

BMF House - Wight Moss Way,

Southport Business Park

Southport PR8 4HQ

ENGLAND, UNITED KINGDOM

Contact Us:



0044 (0) 1704-516 501



enquiries@united-automation.com



www.united-automation.com

unitedautomationltd

UA_Limited

14 July 2025 | Issue: 5

Page

2 of 4

INSTALLATION CIRCUIT

A typical system with 3 x D/A units is shown below:

CONFIGURATION OPTIONS

The HMI unit can control up to 3 D/A units, the HMI selects a particular D/A unit by means of a 2 bit address. The address of

each D/A unit is selected by switches 3 and 4, on DIP switch SW1, on each D/A unit. Switch 4 on SW1 is used to set the least

significant bit of the address, switch 3 on SW1 is used to set the most significant address. The HMI unit uses addresses 01, 10

and 11 to access the three D/A units. The 9 possible output channels, as indicated on the HMI display, are mapped across the 3

D/A units. The Table below shows how to set up the D/A switches for the three allowable address values and how the displayed

channels are mapped to each D/A unit:

D/A 1

D/A 2

D/A 3

Switch setup xx01

Switch setup xx10

Switch setup xx11

Mapped Channels 1,2,3

Mapped Channels 4,5,6

Mapped Channels 7,8,9

Switches 1 and 2 on SW1 are not used and are ignored by the D/A and HMI units.

Please note that the D/A units should be set up with unique addresses; duplication of D/A addresses will result in unknown

output levels being driven on the analogue outputs.

SET UP

CAUTION! Ensure the mains supply is disconnected before proceeding.

Set the D/A address switches on each D/A unit to a unique address, refer to the "Configuration Options" section.

Connect the HMI unit to the D/A slave units using four core, dual twisted pair type cable, the cable should have a minimum

gauge of 26AWG. One twisted pair should be used for the RS485 A and B signals, the other for the power connection. The

corresponding signals on each unit should be connected, namely: A, B, +, -.

L

N

+ -

B A + -

AC INPUT

24VDC

RS485 24VDC

110VAC-230VAC

INPUT

AC OR DC POWER

ANALOGUE OUTPUTS - 0-5VDC

Channel 1 Channel 2 Channel 3

+Vs -Vs +Vs -Vs +Vs -Vs