Model MCX-32
Model MCX-32 Instruction Manual
Rev. 2.3
Page 13 of 49
The MCX-32 controller has been configured to have three separate relay banks (Bank1, Bank2 and Bank3).
Each bank can hold up to five RL-4 modules and are defined by addresses 80h-84h for Bank1, 85h-89h for
Bank2 and 8Ah-8Eh for Bank3. Anytime a specific alarm is fired for a module in a bank, all corresponding
alarms for all modules in that particular bank are also triggered. For example, if alarm 3 of a particular module
is triggered in Bank2, then all alarm 3’s for all the modules in Bank2 will also be fired. RL-4 modules can be
connected to either Port 1 or Port 2 of the controller and be defined in Bank1, Bank2 or Bank3 (See section
6.3.2). The RL-4 modules must be addressed according to the following table:
Table 3
RL-4 Modbus
™
Addresses
Bank
MODULE
DECIMAL
HEX
Bank 1
1
128
80
2
129
81
3
130
82
4
131
83
5
132
84
Bank 2
6
133
85
7
134
86
8
135
87
9
136
88
10
137
89
Bank 3
11
138
8A
12
139
8B
13
140
8C
14
141
8D
15
142
8E
An RL-4 module connected properly to the controller will have a flashing DATA COMM LED to indicate a
valid communication status and will respond to channel activation with an alarm output related to the alarm set
points of the associated channel.
NOTE:
RL-4 modules can be connected to either Port 1 or Port 2, they must be addressed
correctly, they must be defined in Bank1, Bank2 or Bank 3, and only those RL-4’s associated
with a channel will be available
Each relay within the bank can be set as Energized/De-Energized, Silenceable/Non-Silenceable, and
Latching/Non-Latching (See section 6.3.2).
4.4.1
Energized or De-Energized
All alarms relays - Alarm 1, Alarm 2, Alarm 3, and Fault - can be configured to operate in either energized or
de-energized mode. In de-energized mode, the normally open contact is open if the alarm level has not been
reached (alarm relays) or the sensor is not in fault (fault relay). In energized mode, the normally open contact
is closed if the alarm level has not been reached (alarm relays) or the sensor is not in fault (fault relay).
Energized mode provides for fail-safe operation since a loss of power or cable failure will cause the contact to
be open.
4.4.2
Silenceable or Non-Silenceable
All alarms - Alarm 1, Alarm 2, Alarm 3, and Fault - can be configured to operate as silenceable, or non-
silenceable. If an alarm or fault is configured as non-silenceable, the corresponding relay, once activated, will
stay activated until the cause of the alarm or fault has cleared. If an alarm or fault is configured as silenceable,
