Instructions

Power manual for MACX Analog, MACX Analog Ex, MACX PL, MINI Analog, and MINI Analog Pro signal conditioners
50 PHOENIX CONTACT 105810_en_01
5.2 Supply via MACX MCR-PTB... and TC-MACX-MCR-
PTB power terminal blocks
MACX MCR-PTB… (Order No. 2865625) and TC-MACX-MCR-PTB (Order No. 2904673)
power terminal blocks are particularly suitable for supplying power to MACX Analog mod-
ules. This means that a total current of 3.75 A or 2 A can be supplied. Integrated error eval-
uation is an additional advantage here. An auxiliary supply failure or fuse fault is indicated
by a relay contact and displayed via a flashing LED. Redundant supply is supported as an
option. The decoupling of power supplies used for supply is ensured by the diodes inte-
grated in the module. In addition, it is possible to extend mechanical redundancy by using
two power terminal blocks. Each power terminal block is protected by an integrated 5 A
fuse. The TC-MACX-MCR-PTB, on the other hand, does not have an integrated fuse. Here
a 2.5 A fuse should be connected upstream of every input. It is important to make sure here
that tripping is guaranteed in the event of a short circuit by the power supply/supplies used.
You can calculate the maximum number of modules, regardless of whether you are using
one or two (TC-)MACX MCR-PTB… modules, with the aid of the product documents using
the formula below.
5.2.1 Supply via a MACX MCR-PTB… power terminal block
For supply via a power terminal block, simple supply can be implemented by means of one
power supply, see Figure 5-3 on page 50, or redundant supply by means of two different
power supplies is implemented, see Figure 5-4 on page 51.
Figure 5-3 Supply by means of one power supply
n
modules
I = n * I + n * I + n * I + ...
N 1 module12module23module3
I
max
I
N
I
N
3.75 A
==
n
modules
I
max
I
N
I
N
2 A
==
MACX MCR-PTB-... TC-MACX-MCR-PTB
1.2
2.2
3.2
12
3.3
14
1.1
2.1
3.1
11
Fault out
PWR 2
PWR 1
–
–
+
+
Faultsignal
GND
+24V
LFD
+
–
PSU
TBUS
Modul
1
Modul
n