Instructions

Power manual for MACX Analog, MACX Analog Ex, MACX PL, MINI Analog, and MINI Analog Pro signal conditioners
36 PHOENIX CONTACT 105810_en_01
4.2 Supply via a MINI MCR-2-PTB power terminal block
MINI MCR-2-PTB… power terminal blocks are particularly suitable for supplying power to
MINI Analog Pro modules. They are available in the familiar 6.2 mm housing and so inte-
grate seamlessly into the MINI Analog Pro range. Redundant supply is supported. The de-
coupling of power supplies used for supply is ensured by the diodes integrated in the mod-
ule. In addition, it is possible to extend mechanical redundancy by using two power terminal
blocks. A 4 A fuse should be used to protect the power terminal block(s). It is important to
make sure here that tripping is guaranteed in the event of a short circuit by the power sup-
ply/supplies used. You can calculate the maximum number of modules, regardless of
whether you are using one or two MINI MCR-2-PTB… modules, with the aid of the product
documents using the formula below.
4.2.1 Supply via a MINI MCR-2-PTB… power terminal block
In the case of supply via the power terminal block, all MINI Analog Pro modules connected
via the TBUS DIN rail connector are supplied. Both supply inputs can be supplied by one
power supply, see Figure 4-3 on page 37, or redundant supply by means of two different
power supplies is implemented, see Figure 4-4 on page 37. It is important here that both
supply circuits have separate protection. In this way a maximum current of 3.2 A can be fed
into the DIN rail connector.
Recommended fuse for power terminal block:
Fuse as per IEC 60127-2/V
Nominal current: 4 A
Characteristic: slow-blow
(e.g., Wickmann 5 x 20 mm/No. 195 - glass fuse)
n
modules
I = n * I + n * I + n * I + ...
N 1 module12module23module3
I
max
I
N
I
N
3.2 A
==