Detcon RD-64X-N7 - Manual (Page 28)

RD-64X Operators Manual
7.4 Optional Remote Alarm Reset/Acknowledge Switch (N7 Enclosure)
The RD-64X-N4X remote display comes with an external Remote Alarm Reset/Acknowledge switch
located on the side of the enclosure. The RD-64X-N7 remote display has the option of adding an external
Remote Alarm Reset/Acknowledge switch and will have to be mounted externally such as in the bottom of
a J-Box if one is available. The Reset Switch enables the user to reset or acknowledge alarms without
having to open the enclosure and should be a normally-open momentary contact push button type switch.
For the N7 enclosure, connect the switch to the terminals “SW” on connector J7 of the RD-64X PCA (See
Figure 15) Once installed, pushing the switch will execute the reset/acknowledge function.
RESET SWITCH
1 2 SW1
PWR
GND
A2
B2
A1
B1
SW
J7
D3 D4
Figure 15 N7 Remote Switch Input
8. Modbus Communications
The RD-64X remote display features a Modbus™ compatible communications protocol and is addressable
by a PLC, PC/HMI, DCS or other Modbus™ RTU master-polling devices. Communication is
accomplished by two wire half duplex RS-485, 9600 baud, 8 data bits, 1 stop bit, no parity, through the
display’s primary port (COMM1).
8.1 Modbus Register Map
Table 2 RD-64X Register Map
Channel # Register Description Channel # Register Description
40000 Reading 40064 Reading
Channel 1
40001 Status
Channel 33
40065 Status
40002 Reading 40066 Reading
Channel 2
40003 Status
Channel 34
40067 Status
40004 Reading 40068 Reading
Channel 3
40005 Status
Channel 35
40069 Status
40006 Reading 40070 Reading
Channel 4
40007 Status
Channel 36
40071 Status
40008 Reading 40072 Reading
Channel 5
40009 Status
Channel 37
40073 Status
40010 Reading 40074 Reading
Channel 6
40011 Status
Channel 38
40075 Status
Channel 7 40012 Reading Channel 39 40076 Reading
Model RD-64X Operators Manual Rev. 0.1 Page 24 of 30