Detcon MCX-32-N4X - Manual (Page 20)

Model MCX-32
Model MCX-32 Instruction Manual Rev.2.3 Page 14 of 49
the corresponding relay, once activated, can be deactivated by pressing the Alarm Silence button on the left
edge of the screen.
4.4.3 Latching or Non-Latching Relays
All alarms - Alarm 1, Alarm 2, Alarm 3, and Fault - can be configured as either latching or non-latching. In
non-latching mode, the relay is deactivated as soon as the sensor alarm (alarm relays) or fault (fault relay)
condition is cleared. In latching mode, the relay remains active even after the alarm or fault condition has
cleared. Once activated, the relay can only be deactivated by pressing the Alarm Reset button on the left edge
of the screen after the alarm or fault condition has cleared.
4.5 I/O Module Installation
The quantity of I/O modules supported by the MCX-32 controller will vary depending on the enclosure type
chosen due to physical space limitations. A maximum of 2 I/O modules may be installed on the Model MCX-
32-N1P enclosure. A maximum of 16 I/O modules may be installed in the Model MCX-32-N4X enclosure
(Four modules can be installed on DIN rail TB1 and 12 can be installed on DIN rail TB2).
Additional
modules will need to be mounted in a separate enclosure by the customer.
I/O modules are mounted on an industry-standard 37.5 x 7.5 mm DIN rail (See Figure 10). Install the first I/O
module at the end of the DIN rail nearest the male connector. Plug the male connector into the side of the
module. Slide it all the way to the end stop. Add additional modules next to the first module. When installing
additional I/O modules, make sure there is about 0.5 inch clearance on either side of the module and snap the
module onto the DIN rail (the 0.5” spacing is to allow for connector clearance). Once the I/O module is
snapped onto the DIN rail, slide it towards the adjacent module and assure that it firmly plugs into it. Connect
the RS-485 and power female connector to the last module installed on the DIN rail. Secure the modules with
an end stop.
S
B
A
-
+ +
RS-485 and
Power Cable RS-485 and Power
Cable from Output
Terminal Blocks.
Add additional modules
as needed.
Female
Connector
Male
Connector
4-20mA
INPUT
COMM
M
S
D
L
S
D
4-20mA
INPUT
COMM
M
S
D
L
S
D
4-20mA
INPUT
COMM
M
S
D
L
S
D
4-20mA
INPUT
COMM
M
S
D
L
S
D
End Stop End Stop
S
B
A
-
+
S
B
A
-
Figure 10 I/O Module Installation
NOTE: The male connector must be plugged into the I/O module at one end of the DIN rail
and the female connector must be plugged into the I/O module at the other end of the stack of
I/O modules. If these connectors are not properly installed, communication with other RS-485
devices will not be possible.
NOTE: If no I/O modules are installed in the controller, the male connector must be plugged
into the female connector for the RS-485 to communicate.
For addressable I/O modules or Modbus™ sensors that are being located remotely from the controller, General
Cable Commodore p/n ZO16P0022189 is recommended for serial and power connections.