ABB Symphony Harmony Series, Instruction, Page: 146 / 402

I/O Block
WBPEEUI240751C0 3 - 17
closed relay contact wiring connections (Fig. 3-13 ). Addition-
ally, input and output channel terminals are color coded for
easier recognition. The markings and color coding allow wiring
of input and output channels without requiring any additional
documentation:
•
Black letter on blue background - analog input channel.
•
Blue letter on black background - analog output channel.
•
Black letter on orange background - digital input channel.
•
Orange letter on black background - digital output
channel.
The base has a front panel door to conceal the terminal strips
and connectors, and to prevent accidental contact. A label is
affixed to the inside of the door for identifying field wires.
Figure 3-12. Clamp Terminal Base (C Type)
T 01 4 62 A