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Project 2187 Drawing No. CI-3K51101 Rev 10
DMR 2720 18/07/11
Modbus is a Trademark of Schneider Automation Inc. Other Trademarks or company
names mentioned herein are the property of their respective owners.
Integra Ci3 digital metering system
1. Features and options
The Integra Ci3 digital meter is designed for accurate measurement and display of all major electrical and power
quality parameters. It is has been designed, developed and manufactured in the UK, by Crompton Instruments.
It is user programmable to suit single-phase two wire, three-phase three-wire, and three-phase four-wire system
configurations.
The product features a DIN 96 panel mounted snap-fit enclosure, backlit Liquid Crystal Display (LCD) and user
programmable CT ratios, accessible via an intuitive user interface. The Integra Ci3 digital meter measures 17
electrical parameters including total harmonic distortion (THD) up to the 31st harmonic.
The Integra Ci3 digital meter offers two output ports at the rear of the product. This allows to fit either two
isolated pulsed output relays or a RS-485 communication module to allow Modbus protocol or Johnson Controls
communication output. These are configurable via internal settings.
1.1 Power Supply
The Integra Ci3 digital meter must be powered from an auxiliary AC or DC supply that is separate (but it may
also be commoned) from the metered supply. The input range of the auxiliary is 110-400V AC or 120-350V
DC. All connections are made to screw clamp terminals that accept 0.05 - 2.5mm
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stranded or solid core
cables. Terminal screws are fully tightened for shipment and must be undone before wire insertion.
Terminal screws should be tightened to 0.5 Nm (4.4 lbf in) only.
1.2 RS485 Module Option
An optional RS485 module is available for purchase. Where a RS485 module is available, it can be
connected to a PC for control and monitoring purposes using either Modbus protocol or Johnson Controls
protocol. A maximum of one RS485 module can be fitted to an Integra Ci3 digital meter.
1.3 Pulse Relay Module Option
An optional Pulsed Relay module is available for purchase. Pulse relays are user programmable for
corresponding energy type, pulse divisor (one pulse for every 0.1, 1, 10, 100 or 1000kWh/kVArh for
example) and pulse width (duration). A maximum of two Pulsed Relay modules can be fitted to an Integra
Ci3 digital meter, when no RS485 module is fitted. When two Pulsed Relay modules are fitted, they share a
common divisor value and pulse width.
1.4 Display Screen
The display screen is used in two main modes: display of measured values and parameter setup.
1.5 Front Panel Buttons
The front of the product has four buttons that select different electrical parameters and are also used for
system configuration.
is used to select the Voltage and Frequency parameter screens.
In set-up mode this is the “Back” button.
is used to select the Current parameter screens.
In set-up mode this is the “Up” button.
is used to select the Power and Power Factor parameter screens.
In set-up mode this is the “Down” button.
Installation instruction