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DESCRIPTION
FlexCard option cards are for use in PAX2 series meters/controllers with
FlexBus option. FlexCard programming is integrated into the host PAX2
programming, which provides for parameters to be shared between them.
FlexCards provide increased flexibility of input/output capabilities. The
selection of FlexCard functionality is independent of other installed option
card(s) functionality. A FlexCard can be installed in any available PAX2
FlexBus slot.
This bulletin contains information for Analog Input FlexCards including
Process Input/Remote Setpoint and Heater Current Monitor. Input connections
are made through a screw-clamp terminal block at the rear of the PAX2 meter/
controller. Each card provides four solid-state outputs, that can be mapped to
numerous parameter values in the host meter/controller. Output wiring
connections are provided by a removable spring-cage terminal block, which
engages PCB edge fingers through an access slot on the top of the PAX2
meter/controller.
The
Process Input/Remote Setpoint (
Prc
)
FlexCard accepts a DC Voltage
(0 to 10V) or DC Current (0 to 20mA) input signal and provides a process
value to the host PAX2 meter/controller. PID control, if desired, is performed
directly by the card, separate from the host meter/controller. This allows for
multiple PID loops to be used in a single PAX2 meter/controller. Process
parameters such as input range selection, scaling, offset value and PID control
parameters are programmed through the host meter/controller.
When installed in a PAX2C controller, this FlexCard provides an additional
analog input, which can be configured as a remote setpoint input or as a
secondary process input. Configuration of the analog input as a remote
setpoint signal allows ratio control, master setpoint/multiple slave operation,
and the ability to cascade the PAX2C with another controller. Configuration
of the analog input as a secondary process signal allows operation as a two-
process cascade controller within a single unit.
The
Heater Current Monitor (
HCur
)
FlexCard is useful for early warning
of heater degradation, or heater circuit failure. The input is designed to
connect to a current transformer with an output of 100 mA AC, to monitor the
AC current load of the heater. A Heater Current alarm ensures that proper
heater current is present when the control output is ON, and little or no current
is present when the output is OFF. This provides indication of a shorted or
open heater circuit. A direct readout of process heater current can also be
displayed, if desired. Heater current limit values and input scaling are
programmed through the host PAX2 meter/controller.
ORDERING INFORMATION
MODEL NO. DESCRIPTION
PART NUMBER
PX2FCA
Process Input/Remote Setpoint Input Card
PX2FCA00
Heater Current Monitor Input Card
PX2FCA10
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in
this literature or on equipment must be observed to ensure personal safety and
to prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired. Do not use this unit
to directly command motors, valves, or other actuators not equipped with
safeguards. To do so can be potentially harmful to persons or equipment in the
event of a fault to the unit.
GENERAL SPECIFICATIONS
1.
POWER
:
Power for the card is provided by the host PAX2 meter/controller.
2.
INPUT SPECIFICATIONS AND CONNECTIONS
:
Refer to individual card information.
3.
OUTPUT SPECIFICATIONS
: Four Solid-State NFET outputs
Type: Switched DC, N Channel open drain MOSFET
Current Rating: 1 ADC max
VDS ON: < 0.2 V @ 1 A
VDS Max: 30 VDC
Offstate Leakage Current: 0.5 µA max.
4.
OUTPUT POWER SUPPLY (+Vout)
: 18 to 25 VDC @ 40 mA maximum.
5.
CERTIFICATIONS AND COMPLIANCES
:
Complies with all certifications and compliances of the host PAX2 meter/
controller in which it is installed.
6.
CONNECTIONS
:
Rear Terminals: Fixed
Type: High compression cage-clamp terminal block
Wire Strip Length: 0.31” (8 mm)
Wire Gauge Capacity: 26 to 16 AWG (0.14 to 1.5 mm
2
)
Torque: 4.4-5.3 inch-lbs (0.5-0.6 N-m)
Top Terminals: Removable
Type: Spring - cage terminal block.
Wire Strip Length: 0.27” (7.0 mm)
Wire Gauge Capacity: 24 to 16 AWG (0.2 to 1.5 mm
2
) solid or stranded.
CAUTION: Risk of Danger.
Read complete instructions prior to
installation and operation of the unit.
CAUTION:
Risk of electric shock.
Bulletin No. PX2FCA-B
Drawing No. LP0925
Released 03/15
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
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USE IN PAX2 WITH FlexBus™ OPTION
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FOUR SOLID STATE OUTPUTS
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INSTALL FlexCard™ OPTION CARD IN ANY OPEN SLOT
Process Input/Remote Setpoint w/PID Control
Heater Current Monitor
MODEL PX2FCA - Analog Input FlexCards
