ABB Symphony Harmony Series, Instruction, Page: 136 / 402

I/O Block
WBPEEUI240751C0 3 - 7
I/O Module
The I/O module (Fig. 3-5 ) contains the I/O processing cir-
cuitry. The circuitry consists of multiple printed circuit boards
that perform signal conditioning and processing dependent on
I/O type. An onboard processor performs engineering units
conversion, online diagnostics, and Hnet communications
interface. Power conversion functions are also provided. Front
panel LEDs provide power and digital I/O status indications.
The block packaging provides access to configuration jumpers
on the circuit boards as required by removing the side of the
I/O module (Fig.
3-6 ). A retractable handle facilitates the
installation and removal of the I/O module.
Figure 3-5. I/O Block
I/O M O D U L E
T 006 05 B
I/O B L O C K
T E R M IN AT IO N B A S E
WARNING
An I/O module should not be inserted or removed with power
applied when located in a class I, division 2 hazardous location
unless the area is known to be nonhazardous.