Connections. ASL INTERCOM VAR8

VAR8 / Variants - Installation Guide

2 Connections

Network Interface Upstream

GND

DXP

DXN

Signal Description

GND ISO. Connection for cable screen.

EIA RS485 38400 bits per second (+).

EIA RS485 38400 bits per second (-).

BUS1+

BUS1 −

BUS2+

BUS2 −

BUS3+

BUS3 −

Audio bus Loop 1 (+20dBu Analogue audio).

Audio bus Loop 1.

Audio bus Loop 2 (+20dBu Analogue audio).

Audio bus Loop 2.

Audio bus Loop 3 (+20dBu Analogue audio).

Audio bus Loop 3.

L

Cabling connector: 9 way female clamp terminal (CAMDEN CTB92HE/9)

Network Interface Downstream

SCRN

DXP

Signal Description

Connection for cable screen.

EIA RS485 38400 bits per second (+).

DXN

BUS1+

BUS1 −

BUS2+

BUS2 −

BUS3+

BUS3 −

EIA RS485 38400 bits per second (-).

Audio bus Loop 1 (+20dBu Analogue audio).

Audio bus Loop 1.

Audio bus Loop 2 (+20dBu Analogue audio).

Audio bus Loop 2.

Audio bus Loop 3 (+20dBu Analogue audio).

Audio bus Loop 3.

L

Cabling connector: 9 way female clamp terminal (CAMDEN CTB92HE/9)

Audio Inputs 1 and 2

DXP

DXN

Signal Description

EIA RS485 19200 baud (+).

EIA RS485 19200 baud (-).

IN+

IN −

V+

PTT −

PTT+

ACO

Balanced Audio Input 0dBu Max. Sensitivity: − 20dBu Impedance: 10k Ω

As above.

+V supply (18-36V).

Press To Talk switch input (internally pulled up to +5V by 4k7 Ω ).

Press To Talk switch input (internally pulled up to +5V by 4k7 Ω ).

Open collector drive, 100mA max. All Call Only LED.

SN Open collector drive, 100mA max. Speak Now LED.

L

Cabling connector: 10 way terminal block (METWAY 120A11110)

Issue: 01 complete, approved

Page 12 of 22

VAR8 / Variants - Installation Guide

Audio Inputs 3 to 8

DXP

DXN

Signal Description

EIA RS485 19200 baud (+).

EIA RS485 19200 baud (-).

IN+

IN −

V+

V+NB

Balanced Audio Input 0dBu Max. Sensitivity: − 20dBu Impedance: 10k Ω

As above.

+V supply (18-36V).

+V supply (18-36V) (not battery backed).

L

Cabling connector: 7 way terminal block (METWAY 120A11107)

Music Input

Signal Description

IN+ Unbalanced Audio Input. Suitable for 1V to 2V RMS sources. Impedance: 5k Ω

L

Cabling connector: 2 way terminal block (METWAY 120A11102)

Standard Audio Outputs

8 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8

OUT'n' −

Signal Description

OUT'n'+ Balanced Audio Output.

0dBu @ 600 Ω impedance

As above.

L

Cabling connector: RJ45

Table 1 Audio Output Signals and Pinout

Signal RJ45 Pin CAT5 Cable (EIA 568-B)

OUT4- 7 brown/white

OUT6- 3

Upper

OUT7+ 4

OUT8- 7 brown/white

Issue: 01 complete, approved

Page 13 of 22

VAR8 / Variants - Installation Guide

Enhanced A/B Audio Outputs

The enhanced outputs provide simpler connectivity than the standard outputs, but with the same functionality. Separate connections are provided to drive A & B amplifiers from each output.

OUT'n'-A+

Signal Description

A output. Balanced Audio Output, 0dBu @ 600 Ω impedance.

OUT'n'-A − As above.

OUT'n'-B+

OUT'n'-B −

B output. Balanced Audio Output, 0dBu @ 600

As above.

Ω impedance.

L

Cabling connector for outputs 1 to 4: 9 way terminal block (METWAY 120A11109)

Cabling connector for outputs 5 to 8: 8 way terminal block (METWAY 120A11108)

Control Contacts

C'n'+

Cn' −

Signal Description

Opto-isolated input + connection.

As above but –ve connection. In-built resistor to suit voltages of +12 to +40V.

L

Cabling connector: 10 way terminal block (METWAY 120A11110)

RS485 Serial Port

Signal Description

DXN EIA RS485 9600 baud.

DXP EIA RS485 9600 baud.

L

Cabling connector: 3 way terminal block (METWAY 120A11103)

CAN Bus

Signal Description

CANL Controller Area Network (L).

CANH Controller Area Network (H).

L

Cabling connector: 3 way terminal block (METWAY 120A11103)

RS232 Serial Port

Signal Description

TX

RX

RTS

CTS

EIA RS232 Transmit data (9600 baud).

EIA RS232 Receive data (9600 baud).

EIA RS232 Request to Send.

EIA RS232 Clear to Send.

CTRL EIA RS232 Data Terminal Ready.

L

Cabling connector: 2 x 3 way terminal block (METWAY 120A11103)

Fault Relay Contacts

NO

Signal Description

Volt free contact – Normally Open

NC Volt free contact – Normally Closed

L

Cabling connector: 3 way terminal block (METWAY 120A11103)

Issue: 01 complete, approved

Page 14 of 22

VAR8 / Variants - Installation Guide

Audio Monitoring Bus and Auxiliary Supply

V+

A −

Signal Description

Auxiliary supply: 18V-36V fused at 200mA

Audio Monitor Bus, –10dBu nom

L

Cabling connector: 3 way terminal block (METWAY 120A11103)

Power Supply

V+

Signal Description

+V supply (18V-40V DC fused at 2.5A)

L

Cabling connector: 4 way terminal block (METWAY 120A11104)

Issue: 01 complete, approved

Page 15 of 22