Impulse SCMXIF User Manual
Isolated Process Control Signal Conditioning Products
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Accessories for SCM7B Analog Modules
SCM7BXEV
SCM7B
Description
The SCM7BXEV (Figure 1 and 2) is a single channel backpanel that can accept
any of the SCM7B analog modules. It is meant to be used primarily for module
evaluation. Unlike multiple channel backpanels, the single high-level system
output (or input) signal is routed to all channel pins on the system interface
DB25 connector. The backpanel contains four standoffs to allow mounting, using
a #6 or smaller screw.
System Side - Power
Using the V+ supply input, the power supply voltage can be as little as +14VDC.
If +15VDC is available, it is recommended that the supply be connected between
the V+A or V+B connections and COM; this will protect the module against
accidental supply reversal. Using both these connections with two power
supplies enables redundant operation. It is also recommended that a diode
transient absorber be installed to reduce power supply transient events from
degrading system performance. An accessory location, between the supply
and common lines, is provided for this purpose. The backpanel is fused at
1/4 Amp for module protection.
System Side - Signal
The SCM7BXEV uses either the SCM7BXCA01 (DB25 to 26-pin adapter
cable) and SCMXCA004-XX (26-pin to 26-pin interface cable), or the
SCM7BXCA02 (DB25 to DB25 interface cable), depending on system
requirements.
Field Side - Signal
On the field side, a temperature sensor is mounted underneath the field side
terminal block to provide cold junction compensation for thermocouple modules,
and a current-to-voltage conversion resistor (P/N SCM7BXR1) socketing
location is provided (supplied with SCM7B33 modules). Field connections are
terminated with three screw terminals
Specifications
Operating Temperature 40°C to +85°C
ATEX Group II, Category 3 20°C to +40°C
Relative Humidity 90%
Interface Connector:
Field high density screw clamp, 10-24 AWG
System DB25 (male) with 4-40 screwlocks and
high density screw clamp, 10-24 AWG
SCM7B
Figure 1: SCM7BXEV Dimensions
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Isolated Process Control Signal Conditioning Products
SCM7B
Figure 2: SCM7BXEV Schematic Diagram
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SCM7BP01/SCM7BP02
Backpanel
Isolated Process Control Signal Conditioning Products
SCM7B
Description
The SCM7BP01 (Figure 3) and SCM7BP02 (Figure 4) are 1 and 2 channel
backpanels. Unlike other backpanels available, both the system and field side
sides have screw terminal connectors able to accept discrete wire (10-24 AWG).
The backpanels can be ordered with standoffs to allow mounting, using a #6
or smaller screw, or with DIN rail mounting hardware.
System Side - Power
Both backpanels accept 14-35VDC between V+ and COM using a screw
terminal (10-24 AWG) block. No reverse supply diodes are provided with this
model, but both are fused at 1/4 Amp (01) or 1/2 Amp (02) for module protection.
Field Side - Signal
On the field side, a temperature sensor is mounted underneath the field side
terminal block to provide cold junction compensation for thermocouple modules,
and a current-to-voltage conversion resistor (P/N SCM7BXR1) socket location
is provided (supplied with SCM7B33 modules).
Specifications
Operating Temperature 40°C to +85°C
ATEX Group II, Category 3 20°C to +40°C
Relative Humidity 90%
Interface Connector:
Field high density screw clamp, 10-24 AWG
System high density screw clamp, 10-24 AWG
SCM7B
Figure 3: SCM7BP01 Dimensions
Figure 4: SCM7BP02 Dimensions
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Isolated Process Control Signal Conditioning Products
SCM7BP01-DIN/SCM7BP02-DIN
Panels & DIN Rail Mounting Accessories
SCM7B
Description
The following Dataforth parts (Figure 5) are required for DIN mounting one
SCM7BP01 or SCM7BP02 panel:
Qty Model Description
1 SCMXBEFE Base element with snap foot
2 SCMXSE Side element
The following Dataforth parts are required for DIN mounting two SCM7BP01-DIN
and/or SCM7BP02-DIN panels:
Qty Model Description
2 SCMXBEFE Base element with snap foot
2 SCMXSE Side element
4 SCMXVS Connection pins
The following Dataforth parts are required for DIN mounting three or more
SCM7BP01-DIN and/or SCM7BP02-DIN panels:
Qty Model Description
2 SCMXBEFE Base element with snap foot
2 SCMXSE Side element
(# panels) - 2 SCMXBE Base element without snap foot
(4 x (# panels)) - 4 SCMXVS Connection pins
The following DIN rail styles are available. Specify the required length in meters
(-XX):
SCMXRAIL1-XX DIN EN 50022-35 x 7.5 (slotted steel)
SCMXRAIL2-XX DIN EN 50035-G32 (slotted steel)
SCMXRAIL3-XX DIN EN 50022-35 x 15 (slotted steel)
Ordering Information
Part Number Description
SCM7BP01 Standard single channel backpanel with standoffs for
mounting.
SCM7BP01-DIN One SCM7BP01 with DIN rail mounting hardware.
Shipped fully assembled. Accepts one SCM7Bxx-xx module.
SCM7BP02 Standard dual channel backpanel with standoffs for mounting.
SCM7BP02-DIN One SCM7BP02 with DIN rail mounting hardware.
Shipped fully assembled. Accepts 2 SCM7Bxx-xx modules.
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Figure 5: DIN Rail Mounting Elements
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