Detcon 6400-N1P - Manual (Page 8)

1600/6400-N1P
1600/6400-N1P- Instruction Manual Rev. 1.1 Page 4 of 38
WARNING: Do not attach more devices to the controller power supply than the power supply has the
capacity for, as damage may occur to the controller and the warranty will be void. Modules and
sensors attached to the unit that exceed this power rating should be powered by an external power
supply capable of handling the extended load.
The secondary serial RS-485 port from the controller can be connected to a PLC, PC/HMI, DCS, or other
Modbus™ master polling serial communications device, refer to Section 7.0 Secondary Modbus™ Port.
Optionally, (the RS-485 output is standard, but can be replaced with the optional RS-232) connect the RS-232
output wiring to the D-sub connector located on the optional RS-232 Serial Communications PCB. (Refer to
Figure 4.) Use standard RS-232 cable and D-Sub connector. This serial output may be connected to a PC or
external serial printer.
No Comm
C NO NC
Fault Relay PCB
J1
Serial Communications
Primary
PCB
S
B
A A
B
S
Secondary
J3 J7
RS-232
Serial Communications
RS-485
PCB
S B A J3
(Optional) RS-232
RS-485
Rel
a
y
J2
500-003053-001
500-003054-000
500-005081-000 RS-485
Input Output
Port Port Input Port
Output Port
are brought out to the
Relay Contact connections
Terminal Block via J1
Figure 4 No Comm. Fault Relay and Serial Communications PCB’s
The No Communications Fault Relay is connected to a set of Terminal Blocks on the din-Rail (Figure 5 and
Figure 4.) The Terminal Blocks are labeled “NO COMM” “C”, “NO” and “NC”. The No Comm. Fault Relay
PCB, mounted on the back of the controller PCB, will de-energize the on board relay in the event there is a
‘No Communication Fault’ condition with any activated device. A ‘No Communication Fault’ condition will
‘short’ the common and normally closed contacts and create an open between the normally open and common
relay contacts of the on-board relay. This is required for fail-safe operation. There is a two-minute delay
before any active device will trigger a no communication condition.
The unit includes connections for a 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.