Month: August 2025

FUTURE DEVELOPMENT

 Coprocessor modules providing high volume data

management and communication with major

industrial Ethernet protocols

 Support for redundancy in power supplies, remote

base controllers and CPUs

Small Package, Big Performance

The 2500 Series® Compact PAC system provides the

same functionality found in many larger systems, but in

a smaller form factor and at a lower cost. The 2500

Series® Compact PAC system is fully compatible with all

other 2500 Series®

products, ideal for mixing and

matching products from various product lines to best

meet application requirements.

Whether you’re building a machine or a new process

control system, the 2500 Series Compact® PAC System offers:

 Full-featured performance supporting up to 8192

I/O points

 Rugged metal industrial platform—no plastic

 Advanced functionality

 Hot swappable modules

 Multiple remote I/O network options

 Easy connection to other 2500 Series®

products

 Software configuration of I/O modules from the PLC

The CTI approach to automation

emphasizes continuous evolutionary improvement,

compatibility across successive product generations and

operational simplicity to help customers optimize plant

performance at the least possible cost. 

Small Package, Big Performance

The 2500 Series® Compact PAC system provides the

same functionality found in many larger systems, but in

a smaller form factor and at a lower cost. The 2500

Series® Compact PAC system is fully compatible with all

other 2500 Series®

products, ideal for mixing and

matching products from various product lines to best

meet application requirements.

Whether you’re building a machine or a new process

control system, the 2500 Series Compact® PAC System offers:

 Full-featured performance supporting up to 8192

I/O points

 Rugged metal industrial platform—no plastic

 Advanced functionality

 Hot swappable modules

 Multiple remote I/O network options

 Easy connection to other 2500 Series®products

 Software configuration of I/O modules from the PLC

OVERVIEW

The 2500 Series® Compact PAC System delivers all of

the performance and reliability of the 2500 Series®

Classic System in a significantly smaller form factor.

Featuring the same programming software and

instruction set, and the same communication, remote I/O

and data sharing protocols, the 2500 Series®

common architecture allows Compact System users to get up to

speed quickly using existing tools and diagnostics and to

integrate Compact Series products with other 2500

Series® products easily.

The 2500 Series® Compact System includes a wide

range of digital, analog and specialized I/O modules,

power supplies, and bases. These products work

seamlessly with Classic 2500-Cxxx processors, the new

Compact 2500C-Cxxx processors (coming soon), as well

as Simatic 545 and 555 processors to manage everything

from small discrete control applications to large process

applications with PID loops, alarms, and special

mathematical functions. 

DESCRIPTION

The 2500C-8-IDO-24V Module outputs a wide range of

DC voltage signals. It is designed to provide 8 solid state

output circuits to switch on or off external devices such as

pilot lamps, motor starters or solenoids using an externally

supplied 24VDC. Front panel LEDs provide visual

indication for output and fuse status.

FEATURES

 Single wide module

 8 channels isolated channel to channel

 Each channel is individually fused

 Sourcing or sinking Outputs

 Channel On/Off Status Indication

 Blown fuse indication and reporting for each

channel

 Uses CTI’s 2500C-32F Connector

 Module supports hot swap

Accuracy:

Voltage mode: 0.125% of full scale from 0° to 60°C

Current mode: 0.225% of full scale from 0° to 60°C

Digital Filtering Time Constant: 0.3 Sec

DC Input Resistance:

Voltage mode: 780kW

Current mode: 250W

Repeatability: 0.003125%

Common Mode Rejection:

>120db @ 60Hz (digital filtering disabled)

Normal Mode Rejection:

>40db @ 500Hz (digital filtering enabled)

Isolation:

1500VDC channel-to-PLC

140Vrms channel-to-PLC

Output Specifications:

Output Channels: 4 analog output channels

Output Range:

Unipolar: 0 to 5VDC, 0 to 10VDC, 0 to 20mA

Bipolar: -5 to +5VDC, -10 to +10VDC, or -20 to +20mA

Resolution:

Unipolar 12 bits:

0 – 5VDC range = 1.25mV/step

0 – 10VDC range = 2.5mV/step

0 – 20mA range = 5µA/step

Bipolar 12 bits:

-5 to +5VDC range = 2.5mV/step

0- 10VDC range = 5.0mV/step

-20 to +20mA range = 10µA/step

Accuracy:

Voltage mode: 0.125% of full scale from 0° to 60°C over total load range

Current mode: 0.225% of full scale from 0° to 60°C over total load range

Capacitance Drive: 0.01 microfarad

Load Resistance:

Voltage mode: 1kΩ minimum, no maximum

Current mode: 0kΩ to 1kΩ max. @ 24VDC

or greater

User Supply: 20 to 30VDC @ 0.25 Amps

(maximum ripple of 0.4V)

UL Class 2 power supply

Isolation:

1500VDC channel-to-channel

1500VDC channel-to-PLC

Specifications

Update Time: 6 mSec – LO density 7 mSec – HI density (all channels including settling time)

Connector: For new installations this module will require a 2500-40F

removable wiring connector sold separately. Part Number 2500-40F.

Backplane Power: 3 Watts (maximum)

Wire Gauge: 14-22 AWG

Module Size: Single-wide

Shipping Weight: 1.5 lb. (0.68 Kg)

Additional Product Information:

On CTI’s Website you will find links to the 2500 Series Std Environmental

Specifications and the UL Agency Certificates of Compliance .

Input Specifications:

Input Channels: 8 analog input channels

Signal Range:

Unipolar: 0 to 5VDC, 0 to 10VDC, or 0 to 20mA

Bipolar: -5 to +5VDC, -10 to +10VDC, or

-20 to +20mA

Resolution:

Unipolar 15 bits plus sign:

0 – 5VDC range = 156mV/step

0 – 10VDC range = 312mV/step

0 – 20mA range = .625mA/step

Bipolar 15 bits plus sign:

-5 to +5VDC range = 156mV/step

-10 to +10VDC range = 312mV/step

-20 to +20mA range = .625mA/step

Description

The 2501 module provides an eight channel analog input and four channel

analog output design in a compact, single-wide module to fit in the CTI 2500 SeriesTM

or Simatic® 505 Series I/O base. It is useful in applications such as machine control,

loop temperature control and weighing systems. 

The 2501 replaces Siemens® 505- 7012 and 505-7016 modules,

except in applications which use the built-in scaling feature.

Features

• CTI 2500 SeriesTM or Simatic® 505 base format

• Fast 6 mSec update time for all channels

• Selectable input/output or input only operating mode

• Bipolar or unipolar inputs per channel

• Inputs: 1500VDC channel-to-PLC isolation

• Outputs:

• 1500V channel-to-channel isolation

• Voltage and current outputs available simultaneously

• Bipolar or unipolar outputs per channel