5B02, STB-TCI, STB-HLI, STB-TC, STB-HL02, STB-AOT

–3–

REV. A

STB-TCI

The STB-TCI isolated thermocouple panel provides the means

to interface up to eight low level voltage signals requiring high

electrical isolation. Low level signals, including thermocouple

voltages, can be read with high accuracy even in noisy environ-

ments. Standard thermocouple types such as J, K, T, E, R, B

and S can be used with the panel, and cold junction compensation

is provided. Each input channel is provided with user selectable

gains of 50, 100, 200 and 1000, permitting signal ranges of

±5 mV, ±25 mV, ±50 mV and ±100 mV. Each channel has a

quick-disconnect screw terminal connector making field installa-

tion and replacement easy. A cover (CV-01) and a rack mount

(RM-02) may be ordered separately.

Each input signal on the STB-TCI panel passes through a 3-pole

low-pass filter with a cutoff frequency of 4 Hz. This filter re-

duces noise that may be present at the analog inputs. Break

detect circuitry is also present to determine if a thermocouple or

cable has been disconnected. Each channel has an isolation

amplifier that provides 750 V rms of channel-to-system and

channel-to-channel isolation. Overvoltage input protection of

240 V is provided as well. A functional diagram of the STB-TCI

is shown in Figure 2.

The STB-TCI, or the 5B02 with 5B30, 5B37, 5B40, or 5B47

modules, should be used instead of the STB-TC panel when high

isolation is required for a harsh environment. The STB-TCI panel

may be used instead of 5B Series modules when an application

has many low level inputs and single channel modularity is not

required.

STB-TCI–SPECIFICATIONS

(typical @ +25 C and +5 V dc)

Number of Input Channels

8

Isolation

750 V rms Channel-to-Channel

and Channel-to-System

Input Impedance

50 M

Ω

Input Voltage Range

±5 mV, ±25 mV, ±50 mV,

±100 mV

Input Overvoltage Protection

240 V ac rms

Gain Range

50, 100, 200, 1000

Jumper Configurable per

Channel

Gain Accuracy

1

±0.05% (at Factory Adjusted

Gain of 100)

Output Offset

1

±3 mV

Offset Drift vs. Temperature

±3.25 µV/°C (at Gain of 100)

(Referred to Input)

CJC Accuracy

±1°C

Low-Pass Filter Frequency

4 Hz

Common-Mode Rejection

130 dB

Power Requirements

+5 V

± 5% @ 300 mA

Physical Dimensions

Without Optional Cover

8.25"

× 6.8" × 1.97"

(20.95 cm

× 17.27 cm × 5.0 cm)

With Optional Cover

8.25"

× 6.8" × 2.14"

(20.95 cm

× 17.27 cm × 5.43 cm)

Operating Temperature Range

0

°C to +60°C

NOTES

Specifications subject to change without notice.

9

TO

1

ANALOG SIGNAL

TO

RTI-820

BOARD AND

CHANNEL ADDRESS

DECODING

FROM

RTI-820

COLD

JUNCTION

COMPENSATION

SENSOR

USER-SELECTABLE GAIN OF

50, 100, 200 OR 1000

USER SELECTABLE GAIN

ETC.

CHANNEL 0

CHANNEL 1

CHANNEL 7

Figure 2. STB-TCI Block Diagram

OBSOLETE