Impulse SCMPB01 - Manual (Page 16)

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Isolated Analog Signal Conditioning Products SCM5B
SCM5B
SCMXCJC
Encapsulated Cold Junction Compensation
Description
The SCMXCJC is the identical circuit used on the SCMPB01/02/03/04/05/06/07
backpanels except it is packaged as a component for use in customer designed
mounting boards (Figure 23). When interfaced to an SCM5B37 or 47 module
the transfer function of the voltage across the +SEN and –SEN pins is V
CJC
= 0.510
–0.0025(T –25)V.
Specifications
Accuracy +25°C ±0.25°C
+5°C to +45°C ±0.5°C
–40°C to +85°C ±1.25°C
Figure 23: SCMXCJC Physical Dimensions and Pin Layout
SCM5BPT
Pass Thru Module
SCMXFS-003
Fuse
SCMXJP-003
Jumper Strap
SCMXR1
Current Conversion Resistor
Description
The SCM5BPT is a pass-through module used to establish a direct connection
between an input signal and the SCM5B series backplane analog bus. It has
unity gain and no isolation. It accepts up to ±10V input and provides up to ±10V
output .
Description
Package of 10, 4 amp fuses for use on the SCMPB01 or SCMPB02 backpanel.
This is a series fuse in the five volt power line. It provides protection against
inadvertent reverse connection of five volt power.
Description
Package of 10 jumpers for connecting adjacent input/output modules on the
SCMPB01 backpanel. This connection is made if it is desired to direct the output
of any input module to the input of an adjacent output module. The jumpers can
also be used for configuring I/O addresses on the SCMPB02 backpanel.
Figure 24: SCMXR1 Physical Dimensions
Description
A precision 20 Ω , 0.1%, 10ppm/°C resistor used with the SCM5B32 current
input module or SCM5B42 two-wire transmitter interface module (Figure 24).
Sockets are provided on the SCMPB01/02/03/04/05/06/07 and
SCMXEV backpanels to allow installation of this resistor. One SCMXR1 is
shipped with each SCM5B32 or SCM5B42 module.
SCM5BPT-1367
Pass Thru Module with Switch
Description
The SCM5BPT-1367 is a pass-through module used to establish a direct
connection between an input signal and the SCM5B series backplane analog
bus. It has unity gain, no isolation, and a logic controlled output switch which
allows sharing of a common analog bus with other SCM5B modules. It accepts
up to ±10V input and provides up to ±10V output . Resettable fuses and
overvoltage protection circuitry protect computer-side electronics.