Watlow EZ-ZONE RMA Modul - Manual (Page 7)

Watlow EZ-ZONE ® RMA Module • 4 • Chapter 1 Overview
A Conceptual View of the RM System
The flexibility of the RM’s software and hardware al-
lows a large range of configurations. Acquiring a bet-
ter understanding of the controllers overall function-
ality and capabilities while at the same time plan-
ning out how the controller can be used will deliver
maximum effectiveness in your application.
The RM system at a high level can have a total
of 17 modules installed, only one of which can be an
RMA module and the others (16 maximum) can be
any combination of available RM modules. Each in-
stalled RM module must have a unique Standard
Bus address (factory default is 1) ranging from 1-9,
A-F, H (10 -16). The Access module will be delivered
with a default Standard Bus address of 17 (J). If not
using the default zone address the user will need to
define each zone address via the button on the face of
each module.
The RMA can be considered an accessory RM
module in that by itself it has no PID control loops.
However, used in conjunction with an RM Control-
ler (RMC) or RM High Density (RMH) module the
RME provides increased I/O capabilities. Outputs of
the RME can be used to drive output loads of various
kinds. For instance, an RME module could be placed
in a remote location (up to 200 feet away) from a PID
controller such as an RMC or RMH to drive a heater.
Some of the user selectable ordering options are
listed below:
1. Class 2 or SELV (Saftey Extra Low Voltage) equiv-
alent Power Supplies:
• 90-264 Vac to 24Vdc @ 31 watts
• 90-264 Vac to 24Vdc @ 60 watts
• 90-264 Vac to 24Vdc @ 91 watts
2. The RMA Module can provide:
• Multiple field bus protocols
• Data logging capabilities (up to 200 data points)
• Real Time Clock with Battery Backup
• Automatically (upon power restoration) re-en-
able a profile to run after a power loss
• Auto-Configuration Backup
Note:
Zones can communicate with one another over the
backplane (local and split rail). Once the system is
configured and running changing zone addresses
without careful deliberation may cause disruption in
operation.
A Conceptual View of RM Hardware Configurations
Due to the scalability and flexibility in the system
components a user has several options available in
the way that the hardware can be connected. Listed
below are a few examples.
RM System Connected to a Programmable Log-
ic Controller (PLC) on a DIN Rail
In this configuration the PLC can be connected to
the RM system via the Access module using one or
more available protocols:
1. EtherNet/IP and or Modbus TCP
2. DeviceNet
3. Modbus RTU
4. Profibus DP
RM
Control
RM
Access
RM
Expansion
PLC Power
Supply
Slot C Slot C Slot C
Slot
E
RM System Connected to a Split Rail with an
Operator Interface Terminal (OIT)
In this configuration both the Inter-module Bus
(backplane communications) and Standard Bus are
connected between rails to allow for remote capabili-
ties. It is recommended that the split rail connection
not exceed 200 feet. In this configuration the OIT
can communicate with all modules (maximum 16
modules any combination with one Access module).
RM
Control
RM
Access
RM
Expansion
OIT
RM
Control
RM
Expansion
RM
Expansion
Power
Supply
Slot
E
Slot C
Slot C Slot C Slot C
Slot C Slot C