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54
Location of the connectors on rear side of
RET 521
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Analog input module 1, AIM1
Analog input module 2, AIM2
Numerical module
Optical communication module
(1)
(1)
(1)
(2)
Power supply module
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(1)
BIM, BOM, IOM
(2)
BIM, BOM, IOM, MIM
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Backplane module
Numerical module (NUM)
Power supply module (PSM)
Human machine interface (LCD-HMI)
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P3
X31
P7
X71
P8
X81 - X84
P8:1
P9
X91, X92
P10
X101, X102
P11
X111, X112
P12
X121, X122
P14
X141
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Carries all internal signals between modules
in a terminal.
Fits into the specific system slot in the back-
plane. The module may carry a mezzanine
card, according to the PMC standard.
DC/DC converter that supports the electron-
ics. Supervision of all voltages is imple-
mented. The module includes one relay
output for the "internal failure" signal.
The module consists of LEDs, a LCD, push
buttons and an optical connector for a front
connected PC
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