IIM Input isolation modules

 

 

 

 

 

 

 

Overview

The IIM isolation modules take a voltage or current input signal and produce a voltage output signal which floats with reference to the input signal ground

 

 

Applications include interfacing modern sensors with old or non-standard controller inputs.

 

 

 

 

 

 

 

 

 

 

Specifications

 

 

 

 

Operating characteristics

 

Input signal, IIM-V

0 - 10VDC

Input signal, IIM-I

4-20mA

Output signal, IIM-V

0-10VDC or 0-5VDC

Output signal, IIM-I

0-10VDC

Operating conditions

-10-40°C

0-90%RH (non condensing)

Output signal current

20mA max

 

 

Electrical specifications

 

Supply voltage

24V AC only +15%-10%

Max operating current

80mA + load presented by input and output

Max sensor current

100mA

Terminals

Rising clamp

for 0.5-2.5mm² cable

Installation category

IEC 664 Category II

Pollution degree

IEC 664 Degree 1

10V input current draw

0.1mA max

 

 

Mechanical details

 

Dimensions l x w x h

99 x 75 .x 67mm

Mass

325g

 

 

 

Features

·        Floating voltage outputs

·        0-5 V and 0-10V inputs (IIM-V)

·        4-20mA input (IIM-I)

·        0-20mA input available on request

·        Sensor powered from IIM

·        24V AC powered

·        DIN rail mounting

 

Connection diagrams

 

 

Power connections

 

 

Ground

(power and signal)

24VAC power

 

 

 

IIM-V sensor side:

 

 

Ground

(power and signal

input for 0-10V

output

input for 0-5V

output

24VDC

for

sensor

 

 

 

IIM-I sensor side:

 

 

Sensor ground

Signal current

24VDC

for

sensor

 

 

 

Controller side:

 

 

0-10V output positive side

0-10V output negative side

 

 

 

 

 

Note: Grounds on sensor side are common to both signal and power

 

 

 

 

 

 

 

Cleaning

 

 

 

 

 

Under normal circumstances, interface modules should not require cleaning.  However they can be cleaned by disconnecting and wiping with isopropanol.  They must be completely dry before reconnection

 

 

Alphaglen Laboratories Limited

Unit 13, Millbrook Business Park, Jarvis Brook, Crowborough, East Sussex TN6 3JZ

Tel: 01892 664224             Email: info@alphaglen.co.uk            Web: www.alphaglen.co.uk

 

 

Whilst every effort has been made to ensure the accuracy of this specification, Alphaglen Laboratories Ltd cannot accept responsibility for damage, injury, loss or expense resulting from errors or omissions.  In the interest of technical improvement, this specification my be altered without notice                                                                 Issue 2001/01

 

 

 

 

 

 

 

 

 

 

 

 

 

IIM Input isolation modules

 

 

 

 

 

 

 

 

 

Installation

 

 

 

 

1

An IIM operates from a 24V AC supply only such as a 24V transformer.  One side of the supply is common to the signal ground on the sensor side of the IIM

2

The output is nominally 0-10V with both sided floating with respect to the sensor side.  In an IIM-V the output is equal to the IP/1 input or half of the IP/2 input.  In an IIM-I the 4-20mA input is converted to

0-10V for output

3

The input signal  of an IIM-V requires >1mA and is therefore compatible with all BEMS controllers that have 0-10V outputs.  The input signal of an IIM-I is from a 4-20mA sensor as illustrated below

4

Ensure that the PCB is not stressed when fitting to the DIN rail.  If releasing from the DIN rail, use a flat bladed screwdriver to release the DIN clips

5

Connections to BEMS controllers should be made using screened cable.  The screen should be earthed at one end only and preferably to a Functional Earth rather than the mains safety earth.  Signal cables should be routed separately from power cables.

 

 

 

 

 

Connection of IIM-I to sensor

 

 

 

Connection of IIM-V to sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Safety

 

 

 

 

The IIM must be installed only by a suitably qualified electrician and may not be safe if installed incorrectly.  The IIM must be used only in an installation which incorporates a switch or circuit breaker.  Terminals must be disconnected from hazardous voltages before screwing or unscrewing.  A 5A fuse on the 24V supply is recommended.  If the IIM is connected to a hazardous voltage, the IIM must be mounted inside a cabinet and must not be accessible from the outside with a 100mm long probe

 

 

 

 

 

Alphaglen Laboratories Limited

Unit 13, Millbrook Business Park, Jarvis Brook, Crowborough, East Sussex TN6 3JZ

Tel: 01892 664224             Email: info@alphaglen.co.uk            Web: www.alphaglen.co.uk

 

 

 

 

 

 

Whilst every effort has been made to ensure the accuracy of this specification, Alphaglen Laboratories Ltd cannot accept responsibility for damage, injury, loss or expense resulting from errors or omissions.  In the interest of technical improvement, this specification my be altered without notice                                                                 Issue 2001/01

 

 

 

 

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