Year: 2026

Description

The 2559-TC is a high-speed 8-point thermocouple

input module designed to translate

millivolt level signals from the thermocouple

element into a scaled temperature value in a CTI

2500 Series or Simatic® 505 I/O base.

Features

• CTI 2500 Series or Simatic® 505 base format

• Replaces Siemens® 505-7028 with no rewiring

• 1500V channel-to-PLC backplane isolation

• Fast 9 mSec update time all channels

• Microprocessor self-diagnostics

• Supports J, K, T, E, R, S, & N thermocouples and millivolt inputs

• No CJC calibration needed

Specifications

Inputs per module: 8

Thermocouple types: J, K, T, E, R, S, N, and mV

Isolation: 1500 VDC channel-to-backplane

Input overrange protection:

30 VDC or VAC continuous

120 VAC for 10 Sec

Measurement ranges:

J: -210oC to 760oC (-350oF to 1400oF)

K: -270oC to 1372oC (-450oF to 2500oF)

T: -270oC to 400oC (-454oF to 752oF)

E: -270oC to 1000oC (-454oF to 1832oF)

R: 0oC to 1768oC (32oF to 3214oF)

S: 0oC to 1768oC (32oF to 3214oF)

N: -260oC to 1300oC (-436oF to 2372oF)

mV: -55 to +55mV

Millivolt input impedance:

4.4MΩ DC, >10KΩ @60 Hz

Open Thermocouple Detect: less than 1 Sec

Data presentation:

With scaling enabled = 0 – 32000 (temp.)

-32000 to +32000 (mV)

With scaling disabled = oC or oF x10 (temp.)

-10000 to +10000 (mV)

Measurement units: Degrees C or F

selectable by module

Digital Filtering Time Constant: 80 mSec

Update time:

9 mSec all channels

Repeatability: +/-1oC, +/-2oF for all

thermocouple types

Accuracy: Types

J: +/-1oC from 0oC to 60oC

K: +/-1oC from 0oC to 60oC

T: +/-1oC from 0oC to 60oC

E: +/-1oC from 0oC to 60oC

R: +/-2oC from 0oC to 60oC*

S: +/-2oC from 0oC to 60oC*

N: +/-1oC from 0oC to 60oC

mV: +/-0.5% full scale or +/- 500μV

ADC Resolution: 16 bits

Common Mode Rejection: >110 db @ 60 Hz

Normal Mode Rejection:

>60 db @ 60 Hz, >50 db @ 50 Hz

Connector: Removable

Wire Gauge: 14-22 AWG

Backplane Power: 1.0 Watt (maximum)

Module Size: Single-wide

Operating Temperature: 0o to 60oC (32o to 140oF)

Storage Temperature: -40o to 85oC (-40o to 185oF)

Relative Humidity: 5% to 95% (non-condensing)

Agency Approvals Pending:

UL, ULC, Class 1-Div. 2. CE

Shipping Weight: 1.5 lb. (0.68 Kg)

Specifications

Input Channels: 8 RTD input channel, independently isolated and configurable

RTD Types:

ΩTCR = 0.003850. Ω/Ω/°C

European DIN 43760

-198 °C to 849.8 °C (-327.6°F to 1561.6°F)

Ω TCR = 0.00672. Ω/Ω/oC

Temperature Range: -79.8°C to 260.0°C (-111.6°F to 500.0°F)

Other RTD types by special request: 0Ω Cu

Absolute Temp Accuracy: +0.4°C (+0.8°F)

Millivolt Range: 0 to 103.04 Millivolts

Millivolt Input Impedance: >10KΩ @ 60Hz

Absolute Millivolt Accuracy: +0.5% full scale or +500μV

Lead Compensation: 20Ω per lead wire

Bias Current to RTD Probe: 250 microamps

Digital Filtering Time Constant: 0.3 Sec

Output Units: Degrees C or F

Repeatability: 0.05% full scale

Resolution: 0.025% full scale

Update Time: 2msec per channel

Common Mode Rejection: >110db @ 60Hz (digital filtering disabled)

Normal Mode Rejection: >145db @ 60Hz (digital filtering enabled)

Input ESD Protection: 20.000V

Overrange Protection: 20 VDC input to common

Isolation: 1500V channel-to-channel

1500 VDC channel-to-PLC

Connector: Fixed 32 position terminal strip

Wire Gauge: 18-24 AWG

Backplane Power: 2.75W @ 5 VDC

Module Size: Single-wide

Shipping Weight: 1.5 lb. (0.68 Kg)

Description

The2552-A is a high-speed 8-channel isolated RTD input module designed to be

compatible with the CTI 2500 Series® or Simatic® 505 I/O base in local, remote I/O,

and Profibus configurations. The 2552-A translates RTD input signals into a scaled

temperature value.

Features

CTI 2500 Series® or Simatic® 505 base format

1500V channel-to-channel isolation

1500V channel-to-PLC backplane isolation

Fast 2msec update time per channel

Detects open in RTD or field wiring

Compensates for lead wire resistance

Supports 0 – 100 millivolt inputs on anychannel

Additional Product Information:

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

and the UL Agency Certificates of Compliance.

Description

The 2551-A is a high-speed 8-channel isolated thermocouple input module de- signed

to be compatible with the CTI 2500 Series® and Simatic® 505 I/O base in local,

remote I/O, and Profibus configurations. The 2551-A translates thermocouple and

millivolt input signals into a scaled temperature value.

Features

 Simatic® 505 I/O base format

 1500 V channel-to-channel isolation

 1500 V channel-to-PLC backplane isolation

 Fast 2 mSec update time per channel

 On-board cold junction compensation for each thermocouple input

 Microprocessor self-diagnostics

Additional Product Information:

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

and the UL Agency Certificates of Compliance.

Specifications

Input Channels: 8 isolated input channels, individually configurable for thermocouple or millivolt input

Thermocouple Types: J or K, jumper selectable for each channel

Millivolt Input: 0 – 55 mV

Digital Filtering Time Constant: 0.3 Sec

Output Units: Degrees C or F,

(jumper selectable for all outputs)

Repeatability: 0.05%

Accuracy: Type J: ±1° from 0° to 760°C

Type K: ±1° from 0° to 1372°C Millivolt: .06 Millivolt

Resolution: 0.3°C, 0.6°F thermocouple input

.020 millivolt input

Common Mode Rejection:

>110db @ 60Hz (digital filtering disabled)

Normal Mode Rejection:

>45db @ 60Hz (digital filtering enabled)

Input ESD Protection: 20.000 V

Overrange Protection: 20 VAC for 1 minute (all input terminals)

Isolation: 1500 VDC channel-to-channel 1500 VDC channel-to-PLC

Connector: Fixed

Wire Gauge: 18-24 AWG

Backplane Power: 2.4 Watts

Module Size: Single-wide

Shipping Weight: 1.5 lb (0.68 Kg)

Description

The 2534 8-Point Form C Relay Output Module provides eight isolated Form C relay outputs

for the CTI 2500 Series® or the SIMATIC® 505 I/O base. This module plugs directly into

the CTI 2500 Series® I/O base and responds to CTI 2500 Series® instructions.

The 2534 is designed for high current applications such as switching motor starters.

It is also designed for 125 VDC (nominal) low level current applications and is especially

suited for applications in power utility substations.

Features

• CTI 2500 Series® base format

• 8 Form C relay outputs

• Isolated 1500 VDC channel-to-backplane

• Wide 15-240 VAC, 15-150 VDC output range

• 4.0 Amps per output

• Individually fused outputs

• Single-wide module

Specifications

Outputs per module: 8

Isolation: 1500 VDC channel-to-backplane

1500 VDC channel-to-channel

Output voltage: 15 – 240 VAC

15 – 150 VDC

Inrush current: 64 Amps for 2 mSec Indicators: 8 individual LEDs Maximum output current:

15VAC – 240VAC: 4A

15VDC – 30VDC: 4A

150VDC: Resistive: 1mA – 500mA Inductive: 1mA – 250mA

Switching rate: 5 ops/sec (no load)

Type of contact: Form C

Type of outputs: Individually fused

Contact life: @ full rated current, 4A = 300.000 cycles @ 2A = 1.000.000 cycles

Backplane Power: 1.0 Watt

User Power Supply: 24VDC +10%

160 mA (all outputs ON)

Fuses: 8. 5 amp, 250V, field replaceable Type Littelfuse #215-005 or Schurter #0001.2511

Connector: 2500-40F sold separately

Wire Gauge: 14 – 22 AWG

Module Size: Single-wide

Shipping Weight: 1.8 lb. (0.82 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 .

Description

The 2530 8-Point Relay Contact Module provides eight isolated “Form C” relay outputs

for the CTI 2500 Series® or Simatic® 505 I/O base. The 2530 is designed for high

current applications such as switching motor starters.

The 2530 is also designed for 125 VDC (nominal) low level current applications. 

This module is especially suited for applications in power utility stations.

Features

• 8 individually isolated “Form C” relay outputs

• Up to 4 amps per output

• 1500V channel-to-PLC backplane isolation

• Switches 125 VDC (ideal for power utility substation applications)

• Single-wide module

• CTI 2500 Series® base format