LAWO mc256 MKII, Техническое руководство

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mc²56 MKII Technical Manual V5.10.2/1 77
Chapter 2: Installation
System Connections
GPI Inputs
The GPI inputs are opto-couplers; accept voltages of 3V..20V; draw a typical current of 8 mA; and are floating and
galvanically isolated.
Ø
GPI 1
·
GENERAL PURPOSE IN 1 & 2 – used for project-specific applications, please check your system
specification for details.
·
ROUTER TAKEOVER (IN) – use this input to force a takeover to the redundant Router Module. The
takeover is triggered by a positive edge at the input.
·
PREPARE COLDSTART (IN) – when turning on the Nova73, supply a voltage at this input to force a cold
start .
Ø
GPI 2
·
ALARM IN 1 to 4 - can be used to monitor peripheral equipment such as devices from other
manufacturers. The inputs MUST be factory-configured. Each alarm is triggered by an applied voltage.
When the input is open or grounded, the alarm is cancelled. Within the AdminHD configuration, you can
assign a text error message for each input, and define whether the input activates the
global alarm .
Predefined standards are:
o
ALARM 1 IN = failure of the external clock supply (activates the global alarm).
o
ALARM 2 IN = failure of the external power supply (activates the global alarm).
o
ALARM 3 IN = failure of the external I/O system (activates the global alarm).
o
ALARM 4 IN = the external device exceeds its operating temperature (activates the global alarm).