Detcon 1600A-N1P - Manual (Page 11)

1600A-N1P
1600A Interface PCA (located on underside of 1600A-N1P Top Panel)
LEDS:
RST
—This LED is normally off. It glows red when the external reset switch is pressed
FAULT —This LED is normally red.
NO COMM —This LED is normally green. It will glow red when a sensor or I/O module is not
communicating. A sensor fault will also cause this LED to glow red.
POWER IN —This LED will glow green when the system is powered on.
Terminal Block Inputs:
XPSN PWR +24VDC connection for PLC expansion module
XPSN GND Ground connection for PLC expansion module
SCRN PWR +24VDC connection for touch screen
SCRN GND Ground connection for touch screen
NO COM PLC output that is set to +24VDC when a NO COMM or senor fault condition occurs
FLT Not used
RST Input from external reset switch
A Primary Modbus ‘A’ connection
B Primary Modbus ‘B’ connection
SHLD Primary Modbus shield connection. Not used.
3.2 Remote Alarm Reset Switch
The unit includes connections for an optional Remote Alarm Reset Switch. A set of Terminal Blocks is
supplied for the connection of a Remote Alarm Reset Switch that can be mounted anywhere outside the unit.
The Remote Alarm Reset incorporates a set of normally closed contacts that cause the unit to reset the Alarms
when contact is broken. To install a Remote Reset Switch the jumper between terminal blocks 8 and 9
(labeled “Remote Reset”) must be removed and the switch wired to these terminals. Connect only a normally
closed switch to these terminal blocks. If more than one switch is to be connected, the switches must be
connected in series.
NOTE: The Remote Alarm Reset switch should be a ‘Normally Closed’ Switch and should be wired as
such. Failure to wire the switch correctly will cause the Enclosure Alarm Reset and all subsequently
connected Remote Alarm Reset Switches to be non operational.
1600A-N1P Instruction Manual Rev. 0.1 Page 7 of 40