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參數(shù)資料
| 型號(hào)： | SCM5B37 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Thermocouple Input Modules |
| 中文描述： | 熱電偶輸入模塊 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 29K |
| 代理商： | SCM5B37 |
DATAFORTH
Call 800-444-7644
For Information and Assistance
SCM5B37
Thermocouple Input Modules
The SCM5B modules are designed wth a completely isolated computer
side circuit which can be floated to
±
50V fromPower Common, pin 16. This
complete isolation means that no connection is required between I/O
Common and Power Common for proper operation of the output swtch. If
desired, the output swtch can be turned on continuously by simply
connecting pin 22, the Read-Enable pin to I/OCommon, pin 19.
The SCM5B37 can interface to nine industry standard thermocouple types:
J, K, T, E, R, S, C, N, and B. Its corresponding output signal operates over
a 0V to +5V range. Each module is cold-junction compensated to correct
for parasitic thermocouples formed by the thermocouple wre and screw
termnals on the mounting backpanel. Upscale open thermocouple detect
is provided by an internal pull-up resistor. Downscale indication can be
implemented by installing an external 47M
resistor,
±
20% tolerance,
between screwtermnals 1 and 3 on the SCMPB01/02/03/04/05/06
backpanels.
Signal filtering is accomplished wth a six-pole filter which provides 95dB
of normal-mode-rejection at 60Hz and 90dB at 50Hz. Two poles of this filter
are on the field side of the isolation barrier, and the other four are on the
computer side.
After the initial field-side filtering, the input signal is chopped by a
proprietary chopper circuit. Isolation is provided by transformer coupling,
again using a proprietary technique to suppress transmssion of common
mode spikes or surges. The module is powered from+5VDC,
±
5%.
A special input circuit on the SCM5B37 modules provides protection
against accidental connection of power-line voltages up to 240VAC.
For Class I, Division 2 hazardous location applications, refer to Dataforth
installation manual MA1146 (available upon request).
FEATURES
G
INTERFACES TOTYPES J, K, T, E, R, S, C, N AND B
THERMOCOUPLES
G
HIGH LEVEL VOLTAGE OUTPUTS
G
1500Vrms TRANSFORMER ISOLATION
G
ANSI/IEEE C37.90.1-1989
TRANSIENT PROTECTION
G
INPUT PROTECTED TO240VAC CONTINUOUS
G
160dB CMR
G
95dB NMR AT 60Hz, 90dB at 50Hz
G
±
0.05% ACCURACY
G
±
0.02% LINEARITY
G
±
1
μ
V/
°
C DRIFT
G
CSA CERTIFIED, FM APPROVED, CE COMPLIANT
G
MIX AND MATCH SCM5B TYPES ON BACKPANEL
DESCRIPTION
Each SCM5B37 thermocouple input module provides a single channel of
thermocouple input which is filtered, isolated, amplified, and converted to
a high level analog voltage output (Figure 1). This voltage output is logic-
swtch controlled, allowng these modules to share a common analog bus
wthout the requirement of external multiplexers.
FIGURE 1. SCM5B37 Bock Dagram
–V
LPF
LPF
+In
–In
–EXC
Backpanel
Term Block
1
2
6
5
3
Surge
Suppression
and
Protection
+V
Isolated
Field-Side
Power
Power
Oscillator
Isolated
Computer-Side
Power
V
OUT
20
19
22
I/O Common
RD EN\
+5V
Power Common
4
3
2
1
+EXC
–V
+V
4
NC
Thermocouple
Precision
Reference
CJC
Temp
Sensor
+2.5V
17
16
100M
Isochopper
Amplifier
Pat Pending
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SCM5B37B | Thermocouple Input Modules |
| SCM5B37C | Thermocouple Input Modules |
| SCM5B37E | Thermocouple Input Modules |
| SCM5B37J | Thermocouple Input Modules |
| SCM5B37K | Thermocouple Input Modules |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCM5B37B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermocouple Input Modules |
| SCM5B37C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermocouple Input Modules |
| SCM5B37E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermocouple Input Modules |
| SCM5B37J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermocouple Input Modules |
| SCM5B37K | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermocouple Input Modules |
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