Watlow EZ-ZONE RMC - Manual (Page 39)

Watlow EZ-ZONE ® RMC Module • 36 • Chapter 2 Install and Wire
Connecting the Modules
RM System Connections
The RMC module can be installed as stand-alone
modules or can be interconnected on the DIN rail as
shown below. When modules are connected together
as shown, power and communications are shared be-
tween modules over the modular backplane intercon-
nection. Therefore, bringing the necessary power and
communications wiring to any one connector in slot
C is sufficient. The modular backplane interconnect
comes standard with every module ordered and is ge-
neric in nature, meaning any of the RM modules can
use it.
Modular Backplane Interconnect
Notice in the split rail system diagram that a single
power supply is being used across both DIN rails.
One notable consideration when designing the hard-
ware layout would be the available power supplied
and the loading affect of all of the modules used.
Watlow provides three options for power supplies
listed below:
1. 90-264 Vac to 24Vdc @ 31 watts (Part #: 0847-
0299-0000)
2. 90-264 Vac to 24Vdc @ 60 watts (Part #: 0847-
0300-0000)
3. 90-264 Vac to 24Vdc @ 91 watts (Part #: 0847-
0301-0000)
With regards to the modular loading affect, maxi-
mum power for each is listed below:
1. RMCxxxxxxxxxxxx @ 7 watts / 14VA
2. RMEx-xxxx-xxxx @ 7 watts / 14VA
3. RMAx-xxxx-xxxx @ 4 watts / 9VA
4. RMLx-xxxx-xxxx @ 7 watts / 14VA
5. RMHx-xxxx-xxxx @ 7 watts / 14VA
6. RMSx-xxxx-xxxx @ 7 watts / 14VA
So, in the split rail system diagram, the maximum
current draw on the supply would be 38 Watts.
- 1 RMC modules consumes 7W
- 1 RME modules consumes 7W
- 1 RMA module consumes 4W
- 1 RMS modules consumes 7W
- 1 RMH modules consumes 7W
- 1 Remote User Interface consumes 6W
With this power requirement the second or third
power supply could be used.
Another hardware configuration scenario that
could present itself (graphic not shown) would be a
configuration that requires more than one supply.
Lets make some assumptions pertaining to the split
rail system diagram shown below. The power supply
used is the 91W supply. The top DIN rail now has the
following modules:
- 2 RMC modules consumes 14W
- 1 RMA consumes 4W
- 11 RME modules consumes 77W
As it can now be understood, the total power require-
ment exceeds 91W. In this case, another power supply
would be required. To incorporate another supply in
this system simply disconnect pins 99 and 98 on the
remote DIN rail and connect another appropriately
sized power supply to those same pins.
When using a split rail configuration ensure that
the interconnections for the Inter-module Bus and
Standard Bus do not exceed 200 feet. Standard Bus
and the Inter-module Buses are different protocols
and both are required for split rail configurations.
Without having both connected communications be-
tween modules would not be possible.
RM Controller
Module
RM Expansion
Module
RM Access
Module
RMCxxxxxxxxxAxx RMEx-xxxx-xxx RMAx-xxxx-xxx
Slot C Slot C Slot C
_
_
_
_
_
_
_
_
Slot A Slot A
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
Slot D
_
_
_
_
_
_
_
_
Slot D
_
_
_
_
_
_
_
_
Slot D
Slot A
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
Slot E
CE CD CF 99 98
RUI
EZKB-xA xx - xxxx
RM Scanner
Module
RM High Density
Module
RMSx-xxxx-Axxx
_
_
_
_
_
_
_
_
Slot A
_
_
_
_
_
_
_
_
Slot D
_
_
_
_
_
_
_
_
Slot E
_
_
_
_
_
_
_
_
Slot B
RMHx-xxxx-Axxx
Slot C
_
_
_
_
_
_
_
_
Slot A
_
_
_
_
_
_
_
_
Slot D
_
_
_
_
_
_
_
_
Slot E
_
_
_
_
_
_
_
_
Slot B
Split Rail Configuration
Standard Bus
Address 4
Standard Bus
Address 5
Standard Bus
Address 1 Standard Bus
Address 2 Standard Bus
Address 3
Standard Bus
Inter-module
Bus
C Y CX CZ CE CD CF 99 98
Slot B
_
_
_
_
_
_
_
_
Slot B
_
_
_
_
_
_
_
_
Slot E
_
_
_
_
_
_
_
_
Slot E
_
_
_
_
_
_
_
_
Slot B
_
_
_
_
_
_
_
_
C Y CX CZ CE CD CF 99 98 C Y CX CZ CE CD CF 99 98
C Y CX CZ CE CD CF 99 98 C Y CX CZ CE CD CF 99 98
Slot C
Power Supply
Low Voltage
Class 2
Standard Bus
Note:
Unit is not provided with a disconnect, use of an ex-
ternal disconnect is required. It should be located in
close proximity to the unit and be labeled as the dis-
connect for the unit.
Note:
Connecting power supplies in parallel is not allowed.
When power consumption is greater than 91 watts use
a split rail configuration.