Month: August 2025

High Level Analog Input System Modules

Three module types are included in the High Level

Analog Input subsystem: a Base Converter module, a

Current Expander module, and a Voltage Expander

module.  A typical subsystem will use a Base Convert

er module and (if required) one or more expander modules.

•Base Converter module – catalog number IC697ALG230

This module has eight differential inputs and

an expansion port.  Each input can be individu

ally configured for either voltage or current.

Each of the input channels also has individual

user scaling.

On-board load resistors are included for normal

input current ranges up to Ç 40 mA.  If other

current ranges or different resolution is re

quired, external resistors may be used.

Standard system configurations for Ç 10 volts

and 4 to 20 mA are available.  These, and other

lower input ranges, can be scaled to engineer

ing units with the user scaling feature.

Features

•Complete Analog subsystem includes Base Converter

and Expander modules

•Base Converter module has eight differential inputs

individually configurable for voltage or current

•Accepts unipolar or bipolar Analog Inputs up to ” 10

volts full scale

•Accepts 4 to 20 milliamp current loop signals

•Individual user scaling on each input channel on Base

•Converter module; scaling on a per module basis for

•Expander modules

•Fast update rate for Base Converter module

•Voltage and current Expander modules, each with 16

inputs, provides for additional inputs at a lower cost

per point

•Complete subsystem can accept up to 120 inputs

•No jumpers or DIP switches to configure

•Easy configuration with MS-DOS or Windows

programming software configuration function.

Removing a Module

The instructions below should be followed when

removing a module from its slot in a rack.

Grasp the board firmly at the top and bottom of

the board cover with your thumbs on the front of

the cover and your fingers on the plastic clips on

the back of the cover.

Squeeze the rack clips on the back of the cover

with your fingers to disengage the clip from the

rack rail and pull the board firmly to remove it

from the backplane connector.

Slide the board along the card guide and remove

it from the rack.

A lithium battery (IC697ACC701) is installed as shown

in Figure 2.  This battery maintains program and data

memory when power is removed and operates the

calendar clock.  Be sure to install the new battery

before removing the old battery.  If during power-up

diagnostics a low battery is detected, the MODULE

OK LED (top LED) will not stay on.  Specific

indication of a low battery state is detailed in

Reference 2.

Battery

A lithium battery (IC697ACC701) is installed as shown

in Figure 2.  This battery maintains program and data

memory when power is removed and operates the

calendar clock.  Be sure to install the new battery

before removing the old battery.  If during power-up

diagnostics a low battery is detected, the MODULE

OK LED (top LED) will not stay on.  Specific

indication of a low battery state is detailed in

Reference 2.

Removing a Module

The instructions below should be followed when

removing a module from its slot in a rack.

Grasp the board firmly at the top and bottom of

the board cover with your thumbs on the front of

the cover and your fingers on the plastic clips on

the back of the cover.

Squeeze the rack clips on the back of the cover

with your fingers to disengage the clip from the

rack rail and pull the board firmly to remove it

from the backplane connector.

Slide the board along the card guide and remove

it from the rack.

Configuration

The IC697 CPU and I/O system is configured with

MS-DOS or Windows based programming software.

There are no DIP switches or jumpers used to

configure the system. The CPU verifies the actual

module and rack configuration at power-up and

periodically during operation. The actual

configuration must be the same as the programmed

configuration.  Deviations are reported to the CPU

alarm processor function for configured fault

response.  Consult Reference 1 for a description of

configuration functions.

Battery

A lithium battery (IC697ACC701) is installed as shown

in Figure 2.  This battery maintains program and data

memory when power is removed and operates the

calendar clock.  Be sure to install the new battery

before removing the old battery.  If during power-up

diagnostics a low battery is detected, the MODULE

OK LED (top LED) will not stay on.  Specific

indication of a low battery state is detailed in

Reference 2.

Programmer Connection, Ethernet TCP/IP

Connecting your programmer via an Ethernet TCP/IP

network requires installation of an Ethernet Interface

module in the PLC.  This can be either the Ethernet

Controller, IC697CMM741. or Ethernet Interface (Type

2), IC697CMM742.  Before connecting your

programmer and PLC to the Ethernet TCP/IP network

you must set the IP address in the Ethernet Interface.

After setting the IP address, connect the PLC and the

programmer running Windows software to the Ethernet Interface.

For more detailed information on Ethernet TCP/IP,

refer to the TCP/IP Ethernet Communications (Type 2)

User’s Manual, and the Windows programming

manual, GFK-1295.

Serial Port

The 15-pin D-connector provides the connection to an

RS-485 compatible serial port on the CPU (see Figure 3).

This port provides a serial connection to a Work Station

Interface board installed in the programming computer.

The serial connection can also be made from the serial

port on the CPU to the serial port on the programming

computer, or other serial device, through the

RS-422/RS-485 to RS-232 Converter (IC690ACC900) or

RS-232 to RS-422 Miniconverter (IC690ACC901).  This

connection can be made with available cables or you

may build cables to fit the needs of your particular

application.  See reference 3  for more information on

serial communications.

For more detailed information on configuration of TMR

systems and communications between PLCs in the

system, refer to the Modular Redundancy Flexible Triple

Modular Redundant (TMR) System User’s Manual.

Installation

It is the responsibility of the OEM, system integrator, or

end user to properly install the PLC equipment for safe

and reliable operation.  Product manuals provide

detailed information about installation, startup, and

proper use of the PLC equipment.  The installation

manual, shipped with your PLC programming software,

describes how to properly install the equipment.  If the

PLC installation must comply with supported standards,

such as FCC or CE Directives, please refer to the

Installation Requirements for Conformance to Standards,

shipped with the PLC programming software, for additional guidelines.

•Installation should not be attempted without refer

ring to the applicable Programmable Controller Installa

tion Manual.

•Connect the battery to either of the battery connec

tors on the module (see Figure 2).

•Put the toggle switch in the STOP position.

•Put the keyswitch in the Memory Protection OFF position.

•Make sure that rack power is off.

•Install the CPM 790 module in slot 1 of rack 0.

•Turn on power.

The module should power up and the top LED should

blink.  When the diagnostics have completed

successfully, the top LED stays on and the second and

third LEDs are off.  The fourth LED is off if the

keyswitch is in the OFF position.  The CPU is now

ready to be programmed (if connected parallel, the CPU

can be programmed regardless of key position).   After

the program has been verified the toggle switch can be

moved to the appropriate operation mode position.

The LEDs indicate the position of the toggle switch,

memory protection status, and the state of the program.

Operating Temperature

The CPM 790 requires forced air cooling for proper

operation in ambient temperatures greater than 40C

(104 F).  A fan capable of 70 CFM (including filters)

should be located beneath slot 1 of the rack containing the CPU.

Fan assemblies (IC697ACC721. IC697ACC724. and

IC697ACC744) can be ordered for direct mounting on

the IC697 rack.  Refer to the applicable Programmable

Controller Installation Manual for detailed information.

The module should power up and the top LED should

blink.  When the diagnostics have completed

successfully, the top LED stays on and the second and

third LEDs are off.  The fourth LED is off if the

keyswitch is in the OFF position.  The CPU is now

ready to be programmed (if connected parallel, the CPU

can be programmed regardless of key position).   After

the program has been verified the toggle switch can be

moved to the appropriate operation mode position.

The LEDs indicate the position of the toggle switch,

memory protection status, and the state of the program.

Operation, Protection, and Module Status

Operation of this module can be controlled by the

three-position RUN/STOP switch or remotely by an

attached programmer and programming software.

Program and configuration data can be locked

through software passwords or manually by the

memory protect keyswitch.  When the key is in the

protected position, program and configuration data can

only be changed by a programmer connected parallel

only (to the Bus Transmitter module).  The status of a

CPU is indicated by the four green LEDs on the front

of the module.

Fan assemblies (IC697ACC721. IC697ACC724. and

IC697ACC744) can be ordered for direct mounting on

the IC697 rack.  Refer to the applicable Programmable

Controller Installation Manual for detailed information.