ABB Symphony Harmony Series Instruction page 52

Description and Operation
Introduction
Module Description
WBPEEUI240769B0
This section explains the inputs, outputs, logic power and con-
nections for the IMCIS22 and IMQRS22 modules. The I/O
modules are process field I/O interfaces for a Harmony con-
troller. The I/O module circuitry performs the following func-
tions:
Analog to digital (A/D) conversion. It changes analog
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inputs to digital values the controller can process.
Digital to analog (D/A) conversion. It changes the control-
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ler digital values to analog voltage or current signals to
control process field devices.
Accepts digital field inputs and isolates the module cir-
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cuitry from the process.
Outputs digital signals to process field devices and isolates
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the module circuitry from the process.
The controller communicates with its I/O modules on a paral-
lel I/O expander bus as shown in Figure 1-1. It references the
address set by I/O address dipswitch (S1). Figure
block diagram of the I/O modules.
The I/O modules consist of a single printed circuit board that
occupies one slot in a module mounting unit. Jumpers on the
printed circuit board configure each of the analog inputs, ana-
log outputs and digital inputs. Analog inputs can also be con-
figured on its respective termination unit.
Two captive screws on the faceplate secure the module to the
module mounting unit. Two front panel LEDs indicate the
module status.
The I/O module has three connection points for external sig-
nals and power (P1, P2 and P3). P1 connects to a common
(ground) and +5 VDC and ±15 VDC power (Table 5-2). P2
Section 2
2-1 is a
2 - 1