Category: CTI

Active LED

The Active LED will be illuminated when the module is functioning normally. If the Active

LED is not lit, or if it is blinking, refer to Chapter 3 for troubleshooting.

Asynchronous Operation

The module operates asynchronously with respect to the PLC.   The controller is

programmed to monitor and control the operation of the High Speed Counter module using

the words and bits provided in the module interface.  The module provides reset, inhibit,

output, and counter status in three WX input words.  The controller uses 5 WY output words

to control counting, control outputs, and set counter presets.

Inputs

The 2502 Two-Channel High Speed Counter Module has two independent counting

channels.  Each channel has four inputs. Each input may be used as either sinking or

sourcing (with external 5–24 VDC power supply). The input signals are connected to the

field wiring terminal block.

Reset – Current flow through the reset input sets the channel’s counter to

zero. The counter will be held at zero until the reset input becomes

inactive.

Inhibit – Current flow through the inhibit input inhibits the channel from

counting. The counter holds at the last value and does not change until the

inhibit input becomes inactive.

Counter Input A, Counter Input B – The relationship of the states of these two inputs,

combined with the counter mode setting, determines the direction of the count. Typical

devices for counting are high-speed static switches or incremental encoders.

Product Summary

The CTI 2502 Two-Channel High Speed Counter Input Module is a member of Control

Technology’s family of I/O modules compatible with CTI 2500 Series™ and Simatic® 505

programmable controllers. It is designed to count pulses on the inputs and return the

current count and status to the controller.

Features

The 2502 provides two independent high-speed counter channels. Each channel includes

the following features.

 Four counter modes:

 Pulse counter

 Quadrature counter modes: 1X, 2X, 4X

 A 10 kHz count rate with a minimum pulse width of 25 s.

 Four inputs:

 two count inputs

 reset

 inhibit

 Two field outputs, each controlled by a separate programmable preset.

 LED indicators display the status of the A and B count inputs, and of Y1 and Y2

outputs.

 All inputs may be sinking or sourcing (with external 24 VDC power supply).

Specifications

Outputs per Module: 8 or 16

Isolation:

2100 VDC channel-to-backplane

3000 VDC group-to-group

Output Voltage: 11 VAC to 240 VAC

Maximum Output Current:

2.0 Amps max.,

8A per group

32A per module

For Class 1 Div 2 locations:

2A per point @50°C

1.5A per point @ 60°C

Maximum Surge Current: 3 Amps for 15 Sec

“ON” State Voltage Drop: 1.0V @ 1.0 Amp

“OFF” State Leakage Current: 1mA

Turn  On Time: 1 AC cycle

Turn  Off Time: 1 AC cycle

Description

The 2598 8/16-Point AC Discrete Output Module

provides eight or sixteen outputs from CTI 2500

Series® or Simatic® 505 I/O bases. The module

utilizes solid-state output circuits to switch on or off

external devices such as pilot lamps, motor starters,

or solenoids. The 2598 is designed to switch

externally supplied 11 to 240 VAC. The internal logic

signals are isolated from the external outputs to 2100 VDC.

Features

• 8 or 16 AC output points

• Replaces Siemens® 505-4608. -4616. -4808. and  -2816

• 3000 VDC group-to-group isolation

• 2100 VDC channel-to-backplane isolation

• Isolation in groups of four (16pt. login) or in groups

of two (8pt. login)

• Wide 11-240 VAC output range

• 2.0 Amps per output

• 16 Amps total module output

• Individually fused outputs

• Sourcing outputs

• Single-wide module

Specifications

Outputs per module: 16 or 32

Isolation: 2100 VDC channel-to-backplane

3000 VDC group-to-group

Output voltage: 15 – 240 VAC

15 – 30 VDC

Indicators: 32 individual LEDs

Maximum output current:

4A per point (resistive)

8A per group (resistive)

Switching rate: 5 ops/sec (no load),

0.5 ops/sec (rated load)

Type of contact: Form A

Type of outputs: Individually fused

Minimum contact load: 10mA @ 5 VDC

Contact life:

@ full rated current, 4A = 400.000 cycles

@ 2A = 1.000.000 cycles

Backplane Power: 1.7 Watts

User Power Supply: 24VDC +10%

600 mA (all outputs ON)

Description

2500 Series®  PLC System

The 2531 32-Point Form-A Relay Output Module

provides 16 or 32 Form-A outputs isolated in

groups of eight for the CTI 2500 Series® or

Simatic® 505 I/O base. The module uses relay

output circuits to switch on or off external devices

such as pilot lamps, motor starters, or solenoids.

The 2531 is designed to switch externally

supplied 15 to 240 VAC and 15 to 30 VDC. The

internal logic signals are isolated from the

external outputs to 2100 VDC.

Features

• CTI 2500 Series® or Simatic® 505 base format

• 16 or 32 Form A relay outputs

Product Bulletin

• Replaces Siemens® 505-4932 with no rewiring

• Isolated 3000 VDC group-to-group

• Isolation in groups of 8

• Wide 15-240 VAC and 15-30 VDC output range

• 4.0 Amps per output

• Individually fused outputs

Product Summary

The CTI 2562 Eight Channel Analog Output Module is a member of Control Technology’s family of I/O

modules compatible with the SIMATIC® 505 and CTI 2500 Series® programmable controllers. The

2562 is designed to translate a digital word from the programmable controller (PLC) into an equivalent

analog voltage and current signal.

Specifications

Output channels: 8 analog output channels

Response Time:

4 mSec total module (includes settling time)

Output Range:

Unipolar: 0 to +5.12 VDC

0 to +10.24 VDC,

0 to +20 mA

Bipolar:   – 5.12 to +5.12 VDC

-10.24 to +10.24 VDC

-20 to +20 mA

Resolution 12 Bits:

Unipolar 12 bits:

0 – 20 mA range =  5µA/step

0 – 5 VDC range = 1.25mV/step

0 – 10 VDC range = 2.5mV/step

Bipolar 11 bits plus sign:

-5 to +5 VDC range =  2.5mV/step

-10 to +10 VDC range = 5.0mV/step

-20 to +20 mA range = 10µA/step

Isolation: 1500 VDC channel-to-PLC

Capacitance Drive:  0.01 microfarad

Load Resistance:

Voltage:   1KΩ minimum, no maximum

Current::   0Ω to 1KΩ max. @ 24 VDC or greater

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

User Supply:

20 to 30 VDC @ 0.50 Amps max.

(maximum ripple of 0.4 V)

NOTE: Maximum load resistance for current

output drops to 600Ω  @ 20 VDC user supply

Connector: Removable

Wire Gauge: 14-22 AWG

Backplane Power: 1.7 Watts

Module Size: Single-wide

Shipping Weight: 1.5 lb (0.68 Kg)

The 2562 is a low-cost, high-speed, 8-channel analog output module designed to be compatible

with the SIMATIC® 505 programmable controller I/O base.

The 2562 translates digital words from the controller into equivalent analog outputs. 

The 2562 is fully compatible with all versions of the 545 and 555 PLCs.

Features

• SIMATIC®  505 base format

• Replaces Siemens® 505-6208 with no rewiring

• 8 analog output channels

• 1500V channel-to-PLC backplane isolation

• Fast 4 mSec update time for all channels

• 12 bits of resolution

• Voltage and current outputs available simultaneously

• Bipolar or Unipolar outputs per channel

• Single-wide module

Special Function Programs

The controller compiles all SF programs and subroutines. 

They are compiled in the following situations:

• When a user program is downloaded to the PLC, if the SF Program or subroutine is enabled,

• When the SF program or subroutine is enabled, if the SF program has been modified,

• During a Power Up start (following the application of power).

Programs that contain errors will not be enabled. During a program download, Workshop will

display a message indicating the error. Once you acknowledge the message,

the download will continue, leaving the program disabled. You must correct the programming

error before the program or subroutine can be enabled. User Programs originally written

for the Simatic® 505 PLC may contain undetected errors, if the programs were not originally compiled.

This can occur because the SF interpreter never attempts to execute the instruction

due to the branching logic. A common problem is that additional ENDIF statements are included

or the correct number of ENDIF statements is not present.

Unlike the Simatic® 555. there are no restrictions regarding the instructions that

can be used in a compiled program.

COMPATIBILITY OVERVIEW

The CTI 2500 Series® Processor is designed to be compatible with customer applications 

that use the Simatic® 545 and 555 controllers. While the CTI 2500 matches or exceeds

the capabilities of these processors in most aspects, there are a few areas in which the

CTI 2500 operates differently.

Relay Ladder Logic

The RLL used in the controller provides equivalent instructions for all Simatic® 555

instructions except the XSUB instruction. External subroutines are not supported.

If you download a program containing the XSUB instruction, it will be ignored.

In many cases XSUB is used for communications with Siemens® Profibus HMI panels.

For these installations we have a CTI program free on our website which replaces the XSUB.

For XSUB uses other than Siemens® HMI panels, CTI and our partners can develop XSUB

replacement software using SF programming. Please contact us.