Block Diagram - ABB Symphony Harmony Series Instruction

Module Description
MODULE
STATUS LEDS
1
S1
OPEN
MODULE
STATUS
I/O EXPANDER
BUS FAULT
DETECTOR
Figure 2-1. Block Diagram
connects the module to the controller through the I/O
expander bus (Table 5-3). The field I/O signals are exchanged
through connector P3 using a cable connected to a termina-
tion unit (Table 5-4). The terminal blocks (physical connection
points) for field wiring are on the termination unit.
The I/O module accepts digital signals of 24 VDC, 48 VDC,
125 VDC and 120 VAC. Individual voltage jumpers on the
module configure each input. A fixed response time (17 milli-
seconds) allows the system to compensate for process field
device debounce time. The output digital signals of 24 VDC
that can sink 250 milliamperes at 24 VDC and 125 milliam-
peres at 48 VDC.
The I/O module accepts analog signals of 1 to 5 VDC (single
ended or differential). Its respective termination unit converts
a 4 to 20-milliampere current to a voltage that is sent to the
I/O module. The analog output mode is selectable; jumpers
select current or voltage mode for each analog output depend-
ing on the process requirements.
The two front panel LEDs provide a visual indication of the
module status to aid in system test and diagnostics. The I/O
module can be removed or installed without powering the
system off.
2 - 2
ADDRESS
SWITCH
A/D INPUT
CONVERTER SELECT
8
ANALOG OUTPUT
DEFAULT JUMPERS
CONVERTER
BUS DIGITAL I/O
INTERFACE BUFFER
INPUT
CONDITIONING
JUMPERS
REFERENCE
E/I JUMPERS
D/A
INPUT
THRESHOLD
ISOLATION
DETECTION
OUTPUT
DRIVER
ISOLATION
LOGIC POWER
P1
ANALOG INPUTS
ANALOG OUTPUTS
P3
DIGITAL INPUTS
DIGITAL OUTPUTS
I/O EXPANDER
P2
BUS
T00084A
WBPEEUI240769B0