Event Inputs - Splicecom Maximiser Installation And Reference Manual

Installation and Reference Manual

Event Inputs

External event inputs are provided using 4 pin mini DIN connectors that have the following pin out:
3 4
1 2
6 7 5
View looking into socket.
Pin Description
1 Limited power source return
2 Signal detect -
3 Limited power source feed (5V)
4 Signal detect +
5 Chassis connection
6 Chassis connection
7 Chassis connection
Pins 5, 6 & 7 are contacts that connect the shield of the mating mini DIN plug to the unit chassis.
The input is an opto-isolator that detects current between pins 4 and 2.
It can be used in one of two modes:
External power source
In this mode the external power source is switched across pins 4 and 2 by the external event, e.g. a
mechanical switch on a door entry system.
The input is isolated from the chassis and has the following specification:
Absolute Maximum Voltage = 60V. Beyond this, damage will occur.
Recommended Maximum Voltage = 48V.
Input impedance = 1000 Ohms.
Recommended on current > 3mA.
Recommended off current = 0mA.
To activate the opto-isolator pin 4 should be at a higher voltage than pin 2. No damage will occur if the
voltage polarity is reversed, however no event will be detected.
Internal power source
For convenience a limited power source is provided on pins 3 and 1. This can be used to drive the opto-
isolator using a switch in series to gate the current to the opto-isolator. Alternatively pin 1 can be
connected to pin 2 and pin 3 to pin 4 and a switch used between pins 4 and 2 to short out the power
source.
Power Source open circuit Voltage = 5V
Power Source impedance = 2000 Ohms
No damage will occur to the power source if it is shorted out.
The power source should not be used for any other purpose.
Technical Data
Installation and Reference Manual v3.2/0410/6 331