ASL INTERCOM iPAM400 User Manual

iPAM400 – Product Manual
U-0629-0171.doc – Issue: 04 complete, approved
Page 15 of 138
Monitored Contact
This interface enables the iPAM400 to monitor the
interface to the contact closure. The contact must
be fitted with 6k8/470R resistors.
A resistance of 7270 ohms indicates inactive (switch
open) and resistance of 470 ohms indicates active
(switch closed). Open and short circuit cable
conditions are thus readily detected by resistance
values outside this range.
MONITORED
CONTACT
470 ohms
6k8 ohms
CABLING TO CONTACT
+5 V
4k7 ohms
0 V
AL 1 - 12
BMB01
ANALOGUE
INPUT
(1 TO 12)
Ambient Noise Sensors
Alternatively the analogue inputs can interface to
the ASL Ambient Noise Sensors (ANS) .
The ANS sensors enable the broadcast volume of
any local zone to be adjusted automatically to a level
above the ambient noise level which is present at
the start of an announcement. The broadcast level is
frozen during the announcement.
CURRENT
BMB01
ANALOGUE
INPUT
(1 TO 12)
CABLING TO ANS SENSOR
+5 V
4k7 ohms
0 V
AL 1 - 12
ANS SENSOR
SENSE RESISTOR
2.1.2.8.3 BMB01 Digital Outputs
Digital outputs 1 to 12 are active-low open-collector outputs.
These can be configured as ‘Busy Outputs’. Each such output can be configured to correspond to the busy
state of any local audio output or group of outputs when being driven by any local or remote audio input or
group of inputs. In the case of a group of local outputs, it operates as an OR function of the busy state of the
local outputs, i.e. if any of them are busy with any of the selected inputs, then the digital output is driven.

ASL INTERCOM iPAM400 Specifications

General

Brand	ASL INTERCOM
Model	iPAM400
Category	Amplifier
Language	English