ABB ontinuous Gas Analyzers AO2000 Series AO2040CU Ex Central Unit in Category 2G

ontinuous Gas Analyzers AO2000 Series

AO2040CU Ex   Central Unit in Category 2G

Cable opening M20 for power supply on the control unit for the pressurized

enclosure system

Cable openings for internal wiring connections

Connection plate with 6 black cable openings M20 for non-intrinsically safe

wiring (some cable openings are used for internal wiring connections)

Metallic cable opening M20 for the shielded system bus cable of the

AO2060-... analyzer module

Cable opening M20 for the 24-VDC connection cable of the

AO2060-... analyzer module

Potential compensation connectors

3 light blue cable openings M20 for intrinsically safe wiring

Threaded Cable

Connections

Permissible Cable

Diameters

Inserting the Cable in

the Housing

Type of Connector

Application

Light blue M20 connector Intrinsically safe connecting leads

Black M20 connector

Non-intrinsically safe connecting leads, AO2060-...

analyzer module 24 VDC connecting cable

Metallic M20 connector

AO2060-... analyzer module system bus cable (see

page 14 for special notes and instructions)

The M20 threaded connectors are suitable for cables with outer diameters of

6-12 mm.

Step Action

1

Remove the cap nut on the threaded connector and remove both seal

rings.

2

Slide the cap nut 1 and seal rings over the cable.

6-8 mm OD Cable: Use seal rings 2 and 3.

8-12 mm OD Cable: Use seal ring 2 only.

Pass the cable through the intermediate openings 4 in the housing.

4

Tighten cap nut 1 (torque to 2.5 Nm).

Sealing Unused

Cable Connections

• Only the manufacturer’s original equipment plugs should be used to close off the

threaded cable connectors.

• Unused cable connectors must be closed off with factory-provided plugs.

• Securely tighten the cap nuts on the unused cable connectors (torque to 2.5 Nm).

AO2040-CU Ex Central Unit Electrical Equipment

Device

Description

For Connection, See -K01 -K02 -K03 -K04

Isolation relays (-K01 standard, -K02 through -K04 optional) for system bus and

non-intrinsically safe signal leads, maximum load 30 VDC/0.4 A

Page 15 -K05

Terminal strip for connecting the 8-wire AO2060-... analyzer module system bus

cable leads not connected to isolation relay -K01

Page 13 -Z01

Line filter for connecting the 3-wire AO2060-... analyzer module 24 VDC cable

Page 13 -B01

Pressurized enclosure system control unit, power supply (230 VAC or 115 VAC,

non-adjustable) status signal pe

< 1.2 hPa

Page 21 -B02

ER 144A/Ex isolation amplifier (option) for condensate monitor,

intrinsically safe connection, EEx ia IIC input current circuit,

electrical specifications per EC type certification TÜV No. 00 ATEX 1604

Page 16 -B03.1 -B03.2

Contrans I V17131-530 isolation amplifier (option) for flow monitor,

intrinsically safe connection, EEx ia IIB/IIC or EEx ib IIB/IIC input current circuit,

electrical specifications per EC type certification PTB 99 ATEX 2119

Page 17 -B04.1 -B04.2 -B04.3 -B04.4

Contrans I V17153-510 passive isolator (option) for current output,

intrinsically safe connection, EEx ib IIB/IIC output current circuit,

electrical specifications per EC type certification PTB 00 ATEX 2017X

Page 18 -B05.1 -B05.2 -B05.3

Contrans I V17132-520 valve control unit (option) for solenoid valves,

intrinsically safe connection, EEx ib IIC output current circuit,

electrical specifications per EC type certification PTB No. Ex-96.D.2013

Page 19 -B06.1 -B06.2

Contrans I V17133-510 isolation relay (option) for switch contact,

intrinsically safe connection, EEx ia IIB/IIC or EEx ib IIB/IIC switch contact circuit,

electrical specifications per EC type certification PTB 99 ATEX 2067X

AO2060-... Analyzer

Module Connecting

Cables

System Bus

The following cables are factory-connected to the AO2060-... analyzer module:

• 10 meter system bus cable (8 x 0.5 mm2) and

• 10 meter 24 VDC connecting cable (3 x 2.5 mm2).

The cables are routed through pressure-tight cable passages.

Connecting

AO2060-...

Analyzer Module to

AO2040-CU Ex

Central Unit

Use of a

Connection Box

System Bus

Termination Resistor

Total Length of

System Bus Wiring

Normally the following connections are made (see Figure 4):

• System bus cable to isolation relay -K01 and to terminal strip -K05 and

• 24 VDC connecting cable to line filter -Z01.

A connection box should be used if the AO2060-... analyzer module cable is too

short or multiple AO2060-... analyzer modules are to be connected to the

AO2040-CU Ex central unit.

For additional information and connecting diagrams see the AO2060-... analyzer

modules operator’s manual (publication number 42/24-12 EN).

In the AO2040-CU Ex central unit, the system bus termination resistor is attached

to the electronics module.

The total system bus wiring length should not exceed 350 meters.