STBHL02_15 Datasheet, PDF (3/11 Pages) Analog Devices – Analog Signal Conditioning Panels

5B02, STB-TCI, STB-HLI, STB-TC, STB-HL02, STB-AOT
STB-TCI–SPECIFICATIONS ^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
(typical @ +25؇C and +5 V dc)
voltages, can be read with high accuracy even in noisy environ-
Number of Input Channels
8
ments. Standard thermocouple types such as J, K, T, E, R, B
Isolation
750 V rms Channel-to-Channel
and S can be used with the panel, and cold junction compensation
and Channel-to-System
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.
Input Impedance
Input Voltage Range
Input Overvoltage Protection
Gain Range
50 MΩ
± 5 mV, ± 25 mV, ± 50 mV,
± 100 mV
240 V ac rms
50, 100, 200, 1000
OBSOLETE 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.
Gain Accuracy¹
Output Offset¹
Offset Drift vs. Temperature
(Referred to Input)
CJC Accuracy
Low-Pass Filter Frequency
Common-Mode Rejection
Power Requirements
Physical Dimensions
Without Optional Cover
With Optional Cover
Jumper Configurable per
Channel
± 0.05% (at Factory Adjusted
Gain of 100)
± 3 mV
± 3.25 µV/°C (at Gain of 100)
± 1°C
4 Hz
130 dB
+5 V ± 5% @ 300 mA
8.25" × 6.8" × 1.97"
(20.95 cm × 17.27 cm × 5.0 cm)
8.25" × 6.8" × 2.14"
(20.95 cm × 17.27 cm × 5.43 cm)
Operating Temperature Range 0°C to +60°C
NOTES
1_{Adjustable to zero.}
Specifications subject to change without notice.
REV. A
USER-SELECTABLE GAIN OF
50, 100, 200 OR 1000
CHANNEL 0
ANALOG SIGNAL
9
TO
TO
RTI-820
1
USER SELECTABLE GAIN
CHANNEL 1
ETC.
FROM
RTI-820
BOARD AND
CHANNEL ADDRESS
DECODING
COLD
JUNCTION
COMPENSATION
SENSOR
Figure 2. STB-TCI Block Diagram
CHANNEL 7
–3–