RMG ISS 900 User manual

Reliable Measurement of Gas

Intrinsicall

y

Safe Power Su

pp

l

y

Unit ISS 900

OPERATING INSTRUCTIONS

STATUS JANUARY 2016

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

Note:

Unfortunately, paperwork does not automatically update itself but technical developments are

constantly being made. Therefore, we reserve the right to change the descriptions and statements

contained in our operating instructions without prior notice. However, you can conveniently

download the most recent version of this manual (and those of other devices) from our website

www.rmg.com.

RMG Messtechnik GmbH

Otto-Hahn-Str. 5 Phone numbers:

35510 Butzbach (Germany) Switchboard: +49 (0)6033 897-0

Fax: +49 (0)6033 897-130 Customer Service: +49 (0)6033 897-127

E-mail: [email protected] Spare Parts: +49 (0)6033 897-173

CONTENTS

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Manual ISS 900 · EN02 · 2016-01

DESCRIPTION OF THE ISS 900........................................................... 1

Intrinsically safe power supply unit ISS 900 .......................................................1

Typical configuration of the EC 912 with the ISS 900.................................................... 2

Functions of the ISS 900 ......................................................................................2

Internal structure of the ISS 900................................................................................... 3

Parametrization of the X2 interface as RS 232.............................................................. 4

Parametrizaton of the X2 interface as RS 422............................................................... 4

Layout print of circuit board .......................................................................................... 5

SAFETY INSTRUCTIONS....................................................................... 6

Instructions for the installer.................................................................................7

Marking ......................................................................................................................... 7

Use................................................................................................................................ 7

Installation and commissioning in areas subject to explosion hazards .......................... 7

Commissioning.............................................................................................................. 8

Servicing, maintenance and troubleshooting................................................................. 8

Removal ........................................................................................................................ 8

ANNEX ................................................................................................. 9

EC type examination certificate ...........................................................................9

CONTENTS

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

DESCRIPTION OF THE ISS 900

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

1

Description of the ISS 900

Intrinsically safe power supply unit ISS 900

The EC 900 family includes four device variants of which the Ex zone 1 devices can be operated in

conjunction with the intrinsically safe power supply unit (Intrinsically Safe Supply) ISS 900.

There are two devices of the EC 900 family which can be operated without a CU (CU = communi-

cation unit). If no DSfG-B function, no current output and thus, no CU are required, the devices

EC 911 und EC 912 will be appropriate for Ex zone 1 applications. The EC 911 is a purely battery-

operated device with a limited life of the battery. If the operator wants to read out data and

communicate with the device frequently, an external power supply unit has to make up for the

disadvantages of the battery. Here the ISS 900 can be used.

Then the typical configuration will be the following one:

Take an Ex zone 1 corrector = EC 911 = a battery-powered standalone device and connect it to an

ISS 900. Then make a few changes of parameters and you'll have an EC 912.

EC 912 = externally powered device for Ex zone 1 without CU, without DSfG-B, without current

outputs, only MODBUS

The ISS 900 includes only hardware circuits; there is no processor and no software.

DESCRIPTION OF THE ISS 900

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Manual ISS 900 · EN02 · 2016-01

2

Typical configuration of the EC 912 with the ISS 900

ESC

Enter

Ex zone 1

Safe area

RS 422

interface

RS 422

interface

ISS 900

power supply isolator

1x RS 232 or

1x RS 422

interface

24 VDC or

115/230 VAC

8 VDC

Functions of the ISS 900

1. Intrinsically safe power supply unit for using the EC 912 in Ex zone 1.

The power supply isolator supplies the EC 912 with 8 VDC in an explosion-protected way. Thus,

the EC 912 can be operated in Ex zone 1. The built-in battery is retained and will start to

operate as an emergency battery in the case of a power failure so that the corrector can keep

on running even if the ISS 900 may be without power supply for some time.

2. Decoupling the COM 1 data interface.

On the power supply isolator module, there is a decoupling element for isolating the RS 422

data interface to the EC 912 in an explosion-protected way. The user can use the decoupled

interface outside the Ex zone, in order to connect the device to external equipment, such as a

PC, a PLC, telecontrol equipment, etc., using the MODBUS protocol. If the EC 912 is

permanently supplied, this makes it possible, for example, to transmit running measured values.

DESCRIPTION OF THE ISS 900

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

3

+

-

9 V supplied intrinsically

safe to the EC 912

RS 422 customer or

RS 232 customer RS 422 to the EC 912

24 VDC supplied

+ and – optionally

connectable

230 VAC

supplied

RS 232 test connector in

parallel to the RS 422

PE N L

RS 232 / 422

jumper field

Internal structure of the ISS 900

DB-9 socket on EC 912 Plug in ISS 900

5 -------------------- 1 (-)

4 -------------------- 3 (TxB)

2 -------------------- 6 (RxA)

1 -------------------- 2 (+)

6 -------------------- 5 (RxB)

8 -------------------- 4 (TxA)

RxA TxA +

RxB TxB -

DESCRIPTION OF THE ISS 900

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

4

Parametrization of the X2 interface as RS 232

Parametrizaton of the X2 interface as RS 422

X2 as RS232 / V24

interface, illustration

without matin

g

p

lu

g

X6 open (without

j

um

p

er

)

X8 open (without

j

um

p

er

)

X2 as RS422 interface,

illustration with mating

plug

X6 with jumpers (2

perpendicular), one pin

remains free below

X8 with jumper (1 horizontal),

one

p

in row remains free above

DESCRIPTION OF THE ISS 900

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

5

Layout print of circuit board

SAFETY INSTRUCTIONS

...............................................................................................................................................................................................................

Manual ISS 900 · EN02 · 2016-01

6

Safety instructions

The ISS 900 power supply unit is used to power the EC 912 in an intrinsically safe way.

The ISS 900 complies with the currently available standards and regulations. However, failure to

operate it properly may cause hazards.

Persons who install or operate the EC 912 PTZ corrector in areas subject to explosion hazards must

be familiar with the currently applicable explosion protection standards and regulations.

Please follow the instructions below:

Danger of explosion

In the manual, this symbol warns you of an explosion hazard. Please follow the

instructions given next to this symbol. As to the danger of explosion, please note the

following in particular:

 The device for Ex zone 1 is intrinsically safe and may only be connected to certified

intrinsically safe circuits.

 The approval of the device for use in areas subject to explosion hazards will expire if

the device is changed impermissibly.

 Communication between the EC 912 and the ISS 900 is permissible only via the

RS 422 interface.

Damage to property

In the manual, this symbol warns you of possible damage to property. The instructions

given next to this symbol inform you about what you can do to avoid damage to the

EC 912 PTZ corrector.

It is essential to observe the warning information in these operating instructions and the generally

applicable safety rules.

No warranty claims can be asserted if there is unauthorized interference with the device!

RMG ISS 900 User manual

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