Honeywell Notifier 002-467 User Manual

Page 1

by Honeywell

Installing the Network Gateway Unit (NGU)Installing the Network Gateway Unit (NGU)

The Network Gateway Unit (PN: 002-467) consists of a Back Box (with cover) with the following fitted on a chassis: a PSU3A

to Network Interface PCB and a Network Gateway Module (NGM) PCB. There is space for a PSU3A and two 12Ah batteries.

This basic configuration is used as an ID net Network Booster. The chassis allows a Fibre-optic PCB and RS232 PCB (for

connection of a network repeater) to be fitted.

The PSU3A provides a 28V output and a battery charger. The PSU3A to Network Interface PCB provides battery and PSU

fault monitoring, controls the battery charger and converts 28V dc to 5V dc (for the Network PCB). Alternatively, the NGU can

be powered by an external 28V supply connected at the PSU3A to Network Interface PCB.

ATTENTIONATTENTION

OBSERVE PRECAUTIONS FOR HANDLING

ELECTROSTATIC SENSITIVE DEVICES

Your Network Gateway Unit, PN: 002-467 should contain:

Back box, NGU, with electronics and cover.

Anti-static Warning Instructions PN: 997-180

Accessory kit, NGU PN: 020-685

The Accessory kit should contain:

Battery interlink assembly PN: 082-082-002

Screw M3 x 6mm button head (8 off) PN: 775-059

Hex key 2mm PN: 334-051

Fuse T 2A H 250V (2 off) PN: 570-106

Fuse T 500mA 250V PN: 570-105

Ferrite (5 off) PN: 670-068

Cable tie (1 off) PN: 233-144

NGU EN54-compliant label PN: 345-497 or

Cable Assembly (PSU3A dc power) PN: 082-244

Cable Assembly (short: NGM/RS232) PN: 082-177-001

Cable Assembly (x-over: NGM/repeater) PN: 082-255

PSU3A

(OPTIONAL)

MAINS

TERMINATION

BLOCK

CHASSISCHASSIS

BACK

BOX

PN: 345-499

EARTH

TERMINATION

KIT (OPTIONAL)

ISOLATED

RS232 PCB

(OPTIONAL)

Check your equipment....Check your equipment....

Take suitable anti-static precautions, such as wearing a grounded

wrist strap, when following ALL instructions. Remove all packaging

from the kit and ensure that it has not been damaged in transit (and

that no items are missing - see checklist on the left) before proceeding

any further. If no damage is evident, proceed using the instructions

below. In the unlikely event that damage has occurred or items are

missing, DO NOT PROCEED, contact your supplier and refer to the

panel’s .

panel’s Installation & Commissioning Manual.

To install the Network Gateway Unit it is necessary to remove the

supplied electronics chassis (to prevent damage), fit the back box to

the wall, re-install the supplied electronics chassis, and fit any

required options. Instructions are given on the following pages.

Installation & Commissioning Manual

(OPTION)

L, N, E

EARTH TO BACK BOX

EARTH TO

UNIT COVER,

& EARTH TO

Note:

See Section ‘PSU3A to Network Interface PCB - if using PSU3A’ for 28V supplies to external equipment.

MAINS

TERMINAL

BLOCK

SAFETY

EARTH TO

PSU

CHASSIS

L, N

BATTERIES

(OPTION)

PSU

RIBBON

28V DC

FROM

EXTERNAL

SOURCE

(OPTION)

PCB -

PSU3A

NETWORK

INTERFACE

28V

5V DC

PSU

FAULT

PCB -

ISOLATED

RS232

(OPTION)

ID NET

CH1 CH2

PCB -

NETWORK

(NGM)

RIBBON

PCB -

FIBRE-

OPTIC

(OPTION)

CH2

CH1

RX/TX

ID NET

FIBRE-OPTIC

PCB

(OPTIONAL)

NETWORK

PCB (NGM)

PSU3A TO

NETWORK

INTERFACE

PCB

BATTERIES

(NOT SUPPLIED)

CROSS-

OVER

RIBBON

(OPTION)

997-451, Issue 6 July 2006

REPEATER

RS232

Page 2

FOR CLARITY, INTERNAL EQUIPMENT IS NOT

SHOWN.

Installing the Network Gateway Unit (Continued)

Preparing the Back Box

1 Remove and retain the four screws that secure the front cover. Disconnect

the cover earth lead from the blade on the cover. Place the cover in a

protective bag and store safely.

2 At the back box, disconnect the chassis earth lead from the blade terminal.

3 Remove and retain the 4 nuts and washers that secure the chassis to the

back box, and remove the chassis together with the electronics mounted

on it. Place in anti-static bag and store safely.

Note: All blade connections to earth incorporate a locking barb. To make a

connection push the shrouded receptacle on to the earth blade (A). To

remove this connection, pull the shroud (B), NOT the earth wire.

Fitting the Back Box to the Wall

Wall Flatness

105.00

To prevent distortion, the back box MUST be installed on the wall as flat as

possible, i.e. with a maximum flatness deviation between any two points of

3mm. Where the wall is out of tolerance, use appropriate packing pieces when

installing the back box to meet the above requirements.

Failure to comply with this requirement will result in the misalignment of

the cover’s securing screws, which may cause difficulties in fitting the

cover.

All dimensions are in millimeters. Fixing hole diameters are 6mm.

Procedure

When a suitable location has been found for installing the back box, and the

Network Gateway Module electronics have been removed, fix the back box to

the wall as follows:

365.00

37.50

190.00

45.00

275.00

45.00

380.00

301.00

DO NOT use the back box as a guide when drilling.DO NOT use the back box as a guide when drilling.

1 Using a suitable-sized drilling bit - for holes to take up to 6mm (No. 12-

sized) wood screws - drill a hole at position A in the wall. Fit a suitable-

sized wall-plug, or equivalent.

2 Hold the back box in position at hole A (ensure the panel is level) and mark

the position of the remaining fixing holes (B). Remove the back box and

store safely.

3 Drill two holes at positions B in the wall, and fit suitable-sized wall-plugs, or

equivalent.

4 Prepare apertures (20mm knockouts) required for cable access. Make

sure paint is scraped from the area surrounding the knockouts, to ensure

good earthing for glands, or use earth termination kit 020-453 (see

previous page for mounting position). Use the 2 top front knockouts for

fibre-optic cables.

5 Secure the back box to the wall using all three fixing holes and

appropriate-sized screws (up to 6mm [No. 12-sized] round or pan-head

screws - do not use countersunk screws).

6 If a PSU3A is to be fitted, follow the procedure given on the next page.

7 Reverse the ‘Preparing the Back Box’ procedure to refit all items except

the cover. Ensure chassis earth connections are made correctly.

8 If an RS232 or Fibre-optic PCB is to be fitted, follow the appropriate ‘Fitting

Optional PCBs’ procedure given on following pages.

9 Refit the cover (ensure earth lead is connected).

997-451, Issue 6 July 2006

Page 3

(typical 4

locations)

Installing the Network Gateway Unit (Continued)

Fitting a PSU3A (Kit PN: 020-648) - Optional

(typical 4

locations)

F - in detailF - in detail

Fitting a PSU3A (Kit PN: 020-648) - Optional

TRANSIT CABLE CLIP: Before proceeding, CAREFULLY cut the cable

clip that secures the ferrite cable loop to the chassis (at 'X' on drawing).

This procedure assumes that the chassis has been removed from the back

box - see ‘Preparing the Back Box’.

Disconnect the dc connector (A) from the Network Gateway Module

1 Disconnect the dc connector (A) from the Network Gateway Module

(NGM) - (B).

Remove and retain the four M3 X 8 SEM screws (C) that secure the NGM

2 Remove and retain the four M3 X 8 SEM screws (C) that secure the NGM

to the chassis, then remove the NGM and store it safely (take anti-static

precautions).

Orientate the PSU3A (D) as shown and secure it to the chassis using the

3 Orientate the PSU3A (D) as shown and secure it to the chassis using the

M4 x 8 SEM screws (E) supplied with the PSU3A.

Replace the NGM onto the chassis (by reversing steps 2 and 1 above),

4 Replace the NGM onto the chassis (by reversing steps 2 and 1 above),

then replace the chassis in the back box.

then replace the chassis in the back box. Ensure the chassis earth

connection is remade.

Push the connector of the PSU3A mains cable (F) into the socket on the

5 Push the connector of the PSU3A mains cable (F) into the socket on the

PSU3A [the other end of the mains cable is factory-fitted to the mains

terminal block (G)]. Ensure the mains cable is routed as shown in the

illustration. Pull tight the cable clip at the side of the back box.

Connect the PSU earth lead (H) to the upper blade on the back box.

6 Connect the PSU earth lead (H) to the upper blade on the back box.

Connect the 4-way power cable (I) and 10-way ribbon cable (J) (supplied

7 Connect the 4-way power cable (I) and 10-way ribbon cable (J) (supplied

with the NGU) between the PSU3A and the PSU3A to Network Interface

PCB.

Use the supplied cable tie to secure the ribbon cable’s ferrite (K) to the tie

8 Use the supplied cable tie to secure the ribbon cable’s ferrite (K) to the tie

point on the chassis.

Remove and discard the PSU rating label (L) from the chassis.

9 Remove and discard the PSU rating label (L) from the chassis.

Remove and discard the NGU product label (M) from the cover. Peel off

10 Remove and discard the NGU product label (M) from the cover. Peel off

the backing from the NGU EN54-compliant label supplied in the NGU

accessory kit, and attach the label to the cover in place of the removed

label.

Ensure the chassis earth

MAINS

WIRES

FOR CLARITY, SHOWN WITH

CHASSIS REMOVED

PSU3APSU3A

Wiring Connections - Mains and Safety Earth

Live and Neutral must only be connected if the PSU3A is fitted. The earth

connection must always be connected. Cables are to be brought into the

back box using 20mm knockouts and appropriate glands - (refer to the panel’s

Installation & Commissioning manual) in accordance with local standards.

Terminate the mains/earth at the terminal block; connections are labelled.

Segregate mains wiring from all other wiring.

When terminating mains leads, ensure that the earth lead is

longer than L and N.

L N L N

>25mm

997-451, Issue 6 July 2006

Page 4

Battery 1Battery 1

Installing the Network Gateway Unit (Continued)

Wiring Connections - Batteries

This procedure only applies if the PSU3A is fitted.This procedure only applies if the PSU3A is fitted.

CAUTION - ENERGY HAZARD! NEVER short the battery

terminals.

Use valve-regulated, lead-acid type12V, 12Ah batteries.

Fuse FP2 T 6.3A H 250VFuse FP2 T 6.3A H 250V

Battery 2Battery 2

+ -+ -

THERMTHERM

Use valve-regulated, lead-acid type12V, 12Ah batteries.

Externally isolate the mains supply at the third-party-supplied isolation

1 Externally isolate the mains supply at the third-party-supplied isolation

unit.

Connect the battery supply wiring plug (A) to the power socket (B).

2 Connect the battery supply wiring plug (A) to the power socket (B).

Place the batteries temporarily in position (with their terminals outermost)

3 Place the batteries temporarily in position (with their terminals outermost)

and measure from the PSU’s 4-way output socket to the rear terminal of

each battery (i.e. one positive and one negative). Disconnect the leads

from the output socket. Cut the battery leads supplied to length. Measure

from the socket to a position on the side wall - NOT the top plate - of the

right-hand battery and cut the thermistor lead to length. In both cases

make the leads as short as possible. Reconnect the leads to the socket.

Remove the batteries from the back box.

Connect the red wire (C) to the positive terminal of battery 2 and the black

4 Connect the red wire (C) to the positive terminal of battery 2 and the black

wire (D) to the negative terminal on battery 1.

Fit the batteries in the back box. Use a suitable silicon-based sealant to

5 Fit the batteries in the back box. Use a suitable silicon-based sealant to

secure the thermistor (E) to the side wall - NOT the top plate - of the right

hand battery.

Connect the interlink cable (F) between battery 1 positive and battery 2

6 Connect the interlink cable (F) between battery 1 positive and battery 2

negative terminal. This will power up the NGU, so do this AFTER wiring to

the PCBs has been connected (see following pages).

When all wiring connections have been completed, fit the cover to the

7 When all wiring connections have been completed, fit the cover to the

back box (ensure the interlink cable is not squashed), and then apply

power.

28V DC

CONNECTOR

0V0V

CONNECTION

REDRED BLACKBLACK WHITEWHITE

5V DC

CONNECTOR

AT NGM

REDRED BLACKBLACK WHITEWHITE

5V DC

CONNECTOR

AT I/F BOARD

Using an External 28V dc Power Supply - Optional

The external dc power supply must satisfy the ratings given in the section

‘NGU Electrical Specifications’.

‘NGU Electrical Specifications’. The mains block earth connection must

still be connected to earth

still be connected to earth - see ‘Wiring Connections - Mains and Safety

Earth’ on the previous page.

Bring the 28V dc cable into the back box via a 20mm knockout. Route the

1 Bring the 28V dc cable into the back box via a 20mm knockout. Route the

cable behind the chassis, as close as possible to the rear wall of the back

Never route the cable across the front of the NGM.

box.

box. Never route the cable across the front of the NGM.

Connect the dc supply to the 0V and terminals of the 28V connector

2 Connect the dc supply to the 0V and terminals of the 28V connector

TB2 on the PSU3A to Network Interface PCB. The use of 1.5mm cable is

recommended. See EMC requirements warning below.

Remove the white wire (PSU FAULT) between the PSU3A to Network

3 Remove the white wire (PSU FAULT) between the PSU3A to Network

Interface PCB 5V connector TB1 and the NGM 5V connector. Connect the

fault output from the external supply to the removed connection at the

NGM. (Open circuit = fault, Short circuit to 0V = OK). If the external supply

does not have a fault output, jumper between this removed connection

and the black wire (0V) at the NGM.

EMC requirements: a ferrite (supplied with the NGU) is

required for the dc power input cable and for the fault signal

cable. Fit the ferrite directly under the gland at the back box

knockout. The screen (if plastic glands are used) and all

cores (plastic or metal glands) of the cable must pass

through the ferrite.

The mains block earth connection must

- see ‘Wiring Connections - Mains and Safety

N54

Use of an external dc power supply does not comply with

EN54 Part 4.

997-451, Issue 6 July 2006

Page 5

Installing the Network Gateway Unit (Continued)

CONNECTION BETWEEN TWO

NETWORK PCBs

Wiring Connections - Network PCB (NGM)

Network cables - Conventional wire cables are terminated at connectors J1

(Channel 1) and J2 (Channel 2). Fibre-optic cable connections are made using

the optional Fibre-optic interface PCB (see following pages).

Cables are to be brought into the back box using 20mm knockouts and

appropriate glands - (refer to the panel’s Installation & Commissioning

manual) in accordance with local standards. Cable shields MUST be

terminated at the gland or back box using the optional earthing blocks (PN:

020-453).

EMC requirements: a ferrite (supplied with the NGU) is

required for each conventional wire network cable. Fit the

ferrite directly under the gland at the back box knockout. The

screen (if plastic glands are used) and both cores (plastic or

metal glands) of the cable must pass through the ferrite.

Network Comms

J3 To/from

Fibre-optic

PCB

Channel 1

EF1

FO1 FO2

124-312

NETWORK PCB

WO1

Connect terminal A to A and B to B.Connect terminal A to A and B to B.

SW1

J4 DC Power

(pre-wired)

EF2

Jumper Link Setting

If cables are connected at J1 and/or J2, ensure jumper links are fitted as

follows:

Channel 1 - WO1

Channel 2 - WO2

When using fibre-optic cables, ensure jumper links are fitted in the following

positions instead:

Channel 1 - FO1

Channel 2 - FO2

For further details refer to the Fibre-optic PCB installation instructions.Note:

Note: For further details refer to the Fibre-optic PCB installation instructions.

Earth Fault Monitoring (EFM)

No action needs to be taken at the NGU as EFM must be set at the

adjacent panels. Ensure that jumper links JP1 and JP2 are NOT fitted.

Note: If an external dc power supply is used, and the external supply has its

0V connected to mains earth, the earth fault monitoring circuit will detect a

fault.

Channel 2 Network Comms

J1J1

J2J2

WO2

J6 RS232 connection:

to Isolated RS232 Board

(using direct ribbon cable)

or to IDR-6A repeater

(using cross-over ribbon cable)

997-451, Issue 6 July 2006

Page 6

Installing the Network Gateway Unit (Continued)

SERIAL No.

PSU/CHGR FLT

SK1

BATT FLT

PWR

28V IN

SK2

28V

500mA

DO NOT USE

CONNECTION

MARKED __

NOTE - If short circuit isolation is not required, loop output + should be wired to terminal 5 and not 2. Terminal 5 is internally connected to terminal 4.

LOOP OUT

LOOP IN

SEE NOTE

CHGR INHIB

From

panel/device

CHGR INHIB

TB4

TB2

NOTE - Break

both tabs (J1

COM FAULT

TB3

N/O COM N/C CHGR INHIB

3 4 5

M701

6 7 8910

1112

x10

A B C

CMX

-2E

1 (-) 2 (+) 3 (-) 4 (+)

and J2)

9 (+)

8 (-) 7 (-)

6 (+)

device

JP3 JP1

Wiring Connections - PSU3A to Network Interface

TB1

PARK

+5V

JP4 JP2

124 - 338

+5V

FLT

PARK CHGR. INHIB

TB4

A B

PCB - if using PSU3A

SK1 is used with the PSU3A (ribbon connector).

SK2 is used with the PSU3A (four-wire dc output connector).

TB1 is pre-wired to the Network PCB (5V dc supply and fault signal).

TB2 provides either a 500mA or 2A dc power output -

TB2 provides either a 500mA or 2A dc power output - the latter is only

available for limited periods, e.g. during alarm

available for limited periods, e.g. during alarm. To use the 500mA supply,

simply connect to the 0V and 28V 500mA contacts - this supply is suitable for a

repeater. To use the 2A supply, proceed as follows:

i Remove fuse F1 and replace with one of the supplied T 2A H 250V fuses.

ii Connect to the 0V and 28V 500mA contacts.

ii Connect to the 0V and 28V 500mA contacts. The supply cannot charge

the batteries while delivering 2A,

the batteries while delivering 2A, so you must temporarily inhibit the

charger by joining together both contacts of TB4 (see examples opposite

- remember to add the control module to the control matrix!).

- remember to add the control module to the control matrix!). Whenever

the charger is inhibited there will be no charge replenishment to the

batteries. The charger inhibit link must be at JP4 (PARK) NOT JP2

(CHRG INHIB) - if charging is permanently inhibited the batteries

will discharge resulting in a battery fault message at the fire panel.

Never

use the terminal marked __ as an output.

Never use the terminal marked __ as an output.

TB3 is a common fault output. The relay de-energises if there is a PSU or

battery fault. With link JP3 fitted (PARK position) the output takes the form of

volt-free contacts rated at 30Vdc, 1A (resistive load). With the link removed

from JP3 and fitted to the ‘+5V’ position, the common contact is taken to 5V dc

via a 1k resistor. With the link removed from JP3 and fitted to the ‘0V’ position,

the common contact is taken to 0V via a 1k resistor.

TB4 allows application of an external charger inhibit signal as described

above.

EMC requirements: a ferrite (supplied with the NGU) is

required for the dc power output cable, for the fault signal

cable, and for the remote charger inhibit signal cable. Fit the

ferrite directly under the gland at the back box knockout.

The screen (if plastic glands are used) and all cores (plastic

or metal glands) of the cable must pass through the ferrite.

Jumper Link Setting

JP1 and JP3 are used in conjunction with TB3 as described above.

JP2 is used to permanently inhibit the charger. JP4 is used if the charger is not

to be inhibited. Always place link on JP4. See the description of TB2 above.

so you must temporarily inhibit the

. To use the 500mA supply,

The supply cannot charge

the latter is only

Whenever

IGNORE THIS LED

WHEN USING AN

EXTERNAL POWER

SUPPLY

SERIAL No.

PSU/CHGR FLT

SK1

28V IN

SK2

CONNECTIONS

USED WITH

EXTERNAL PSU

BATT FLT

PWR

28V

500mA

0V & __

Wiring Connections - PSU3A to Network Interface PCB - if using External Power Supply

TB1 is pre-wired to the Network PCB (5V dc supply and fault signal). This

connector will require re-wiring as described in the Section ‘Using an External

28V Power Supply - Optional’.

TB1

124 - 338

PARK

JP3 JP1

TB3

+5V

JP4 JP2

COM FAULT

TB2

N/O COM N/C CHGR INHIB

TB4

PARK CHGR. INHIB

+5V

FLT

28V Power Supply - Optional’.

TB2 is used as described in the Section ‘Using an External 28V dc Power

Supply - Optional’.

SK1, SK2, TB3 and TB4 are not used in this application. Do not make any

connections.

Jumper Link Setting

In this application, links should be placed on JP3 and JP4. Do not place links

on JP1 and JP2.

997-451, Issue 6 July 2006

Page 7

Installing the Network Gateway Unit (Continued)

Fitting Optional PCBs

CAUTION - Isolate mains and battery power or external

power before installing or removing the optional PCB.

Fibre-Optic PCB (Kit PN: 020-643, PCB PN: 124-319)

1 Position the Fibre-Optic Board (A) as shown and secure it to the chassis

using the four M3 x 8 SEM screws (B) supplied with the PCB.

2 Fit the cables and wiring and configure jumper links as described in the

instructions supplied with the PCB.

Note: Cables are to be brought into the back box using the top front two

20mm knockouts and appropriate glands. Ensure that the bend radius

of the fibre-optic cable is within the limit specified for the cable type

being used.

B x 4B x 4

Isolated RS232 PCB (Kit PN: 020-478, PCB PN: 124-300)

1 Position the Isolated RS232 Board (A) as shown and secure it to the

chassis using the four M3 x 8 SEM screws (B) supplied with the PCB. The

spacers supplied with the PCB are not required and can be discarded.

2 Connect the wiring (see drawing below). Use the straight ribbon cable

(NOT the cross-over cable) supplied with the NGU to connect to the

RS232 port on the NGM. : use screened multi-core

RS232 port on the NGM. Network repeater: use screened multi-core

cable to connect SK1 on the NGU's Isolated RS232 PCB to connector

SK1 on the Isolated RS232 PCB in the repeater.

EMC requirements: a ferrite (supplied with the NGU) is

required for the RS232 cable. Fit the ferrite directly above

the back box knockout. The screen and all cores of the cable

must pass through the ferrite.

Network repeater

TWO-PART

CONNECTOR, TO

EXTERNAL EQUIPMENT

RTS

CTS

S/No.

SIG OV

SK1

SK1SK1 SK2SK2

CONNECTION

TO NETWORK

PCB (NGM)

SK2

CAUTION: Equipment connected to this RS232 port must be

suitably protected against electric shock. Voltages on the

interconnections must not exceed 42V peak or 60V dc under

normal or single fault conditions.

124 - 300

normal or single fault conditions.

997-451, Issue 6 July 2006

Page 8

Installing the Network Gateway Unit (Continued)

Connecting an IDR-6A Network Repeater

To achieve the transmission path integrity required by EN54-2:

12.5.3, the repeater and NGU must be physically connected as

shown opposite to create a single enclosure.

1 Prepare one knockout at the top of the repeater and one knockout at the

base of the NGU.

2 Install the NGU and repeater with the repeater directly below the NGU and

with the prepared knockouts aligned.

3 Connect the repeater and NGU using a suitable short coupling through

the knockouts.

4 Route the cross-over ribbon cable (supplied with the NGU) through the

coupling. Connect one end to the RS232 connector on the NGM and the

COUPLINGCOUPLING

coupling. Connect one end to the RS232 connector on the NGM and the

other end to the RS232 connector on the repeater's termination board. A

ferrite is required immediately above the coupling.

5 Route the dc power wiring to the repeater through the coupling (use the

NGU's 500mA output).

NGU - SEE NGM AND PSU3A TO NETWORK INTERFACE PCB PROCEDURES

NGM

PSU

INTERFACE

PCB

CROSS-OVER RIBBON

NGU TO IDR-6A REPEATER INTERCONNECTIONS

REPEATER - SEE 997-411

SECTION 2.8 FOR DETAILED

WIRING INFORMATION

TERMINATION

PCB

DC POWER CONNECTION

NON-COMPLIANT LONGER-RUN CONNECTION

1 Prepare one knockout at the top of the repeater and one knockout at the

NGU (illustration shows the base, but a top knockout can be used).

2 Install Isolated RS232 Boards in the repeater and NGU. Route the wiring

(max. 15m) between them through the knockouts (CTS and RTS are not

needed). A ferrite is required immediately adjacent to the knockout.

3 Route the dc power wiring to the repeater through the knockouts (use the

NGU's 500mA output).

Use appropriate glands on all knockouts.

NGU - SEE ISOLATED RS232 PCB AND PSU3A TO NETWORK INTERFACE PCB PROCEDURES

NGM

PSU

INTERFACE

PCB

RIBBON

NGU TO IDR-6A REPEATER INTERCONNECTIONS

RS232 LINK

ISOLATED

RS232 PCB

REPEATER - SEE 997-411

SECTION 2.8 FOR DETAILED

WIRING INFORMATION

RIBBON

ISOLATED

RS232 PCB

DC POWER CONNECTION

TERMINATION

PCB

997-451, Issue 6 July 2006

Page 9

Installing the Network Gateway Unit (Continued)

NGU Electrical Specifications

Input Rating when used with external PSU:

Input voltage: 22V - 28Vdc

Maximum current consumption: 100mA

Input Rating when used with PSU3A:

Voltage, frequency: 230Vac, ±15%, 50/60Hz

Maximum current consumption: 1.6A (Protection by 2A mains supply fuse in terminal block)

Output Rating when used with PSU3A:

Output voltage: 26V - 28Vdc

Maximum output current: 500mA (with battery charger available) or 2A (without

battery charger), dependent upon the fuse fitted

Battery Charger Output Ratings (PSU3A):

Battery voltage when charged: 27.3V at 20°C (Charge float voltage)

Temperature compensation: -3mV/°C/cell

Battery fuse rating: T 6.3A H 250V

Final end battery voltage: 21V

Charger ripple voltage: 140mV RMS

Low Voltage Shut Down

If the battery voltage drops below 21V, then the batteries are disconnected automatically to avoid system

malfunction and deep discharge causing permanent damage. Battery capacity should be selected to ensure

sufficient backup time in the event of mains power failure.

Battery Capacity

Sealed valve regulated lead-acid battery types MUST be used. Battery lifetime depends on the ambient

temperature. Refer to the battery manufacturer's technical specification for guidance. When using multiple

batteries, all batteries should be from the same Manufacturer, of the same type and date code and be mounted

in the same cabinet.

Two 12V batteries must be connected in series.

997-451, Issue 6 July 2006