Model C1493B SERIAL DISPLAY BACKLIT0 pages

OMNI-8C
Model C1493/4/5 8 Point Serial Displays.

DATASHEET

Features
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Drive Window displays from your serial port.
Easy to configure Modbus protocol
24Vdc Powered
Small , compact, panel mounted and easy to use
Built in Alarm Flashing sequences to reduce PLC
programming overhead.
Choice of Lamp/Sidebar LED/Backlit LED Display
User printed legends on inkjet/laser
Four Optional Group Alarm output contacts

• Fully “DIP” Switch Configurable
• Optional Control Pushbuttons for operator feedback
user with the best combination of power consumption,
The Omni-16c Serial Display Product Range provides an
reliability, maintenance and cost for the application.
easy-to-use alternative to providing Alarm Window
facilities from your PLC, DCS or SCADA system.
27 integrated alarm flashing sequences included in the
display remove the need for programming of alarm
Each of these products has a fully isolated
sequences in the PLC/DCS reducing engineering
RS232/RS485 serial interface that provides full control of
charges and program space, while increasing reliability.
up to 16 alarm and status windows. Up to 32 of these
displays may be multi-dropped on a single RS485
Optional integral Test, Silence, Acknowledge, Reset
twisted pair, providing up to 512 Window Status and
Pushbuttons allow Operator alarm acknowledgment
Alarm display points from a single serial port acting as a
without any additional programming.
Modbus Master. Each Display serial port acts as a
Four optional output relays can be configured as group
Modbus slave, and can be set to either ASCII or RTU
alarm, horn output and watchdog outputs.
mode at baud rates from 300 to 9600 baud.
Display options include incandescent lamps, backlit
LED and Sidebar LED indicator windows to provide the

SPECIFICATIONS
Power Supply

Modbus Register Layout Overview

Voltage

24Vdc ± 15%

Max dc Ripple
Consumption:
C1490
C1491
C1492

(all windows illuminated)
0.5 Amp max
0.5 Amp max
1 Amps max

Reg. No.

10% pk. to pk.

Alarm Inputs - Potential Free Contact
Quantity and Type

No Physical contact Inputs. 8 Inputs
written to the display unit via the serial
port using Modbus Protocol

Serial Port
Type

Single DB9 connector available on the
rear of the unit supporting both RS232
and RS485 specifications.

Isolation

Serial Port galvanically isolated from
display logic and power supply.
(Tested to 1500Vac for 60 seconds)

Protocol

Modbus slave protocol.(RTU or ASCII)

Baud Rate

DIP Switch set 1200 – 9600 baud

Address Range

DIP Switch set : 1-15.

0
1
2
3
4-11
23
24
100
101-108
109-116
117
119-122
123-126
127
128-133
134

Description

Read/Write

Dynamic Data
16 Inputs as bits
16 Alarm Statuses as bits
5 Pushbutton Control Bits (plus read only 1st out and Flash sync
bits)
Common Service Relays etc. Status Bits
Lamp Status bytes – one per window.
Alive Counter
Software Version Number
Static/Configuration Data
Product Type (14801 for this product)
16 Display Sequence Settings
16 Timer Settings
Relay Function set
Four Relay Output Alarm membership
Four Group Alarm Types
First-out Group split
Reserved
Miscellaneous Setup options

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R/W
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R/W
R/W
R/W

Integral Pushbuttons(Optional)
Quantity

Four buttons mounted on front facia

Functions

Silence; Acknowledge; Reset; Circuit
Test

Copyright Omniflex ♦ Subject to change without notice

Datasheet DSC1493AR04.pdf Sheet 1 or 4

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http://www.omniflex.com

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