red lion PX2FCA User Manual

Bulletin No. PX2FCA-B

Drawing No. LP0925

Released 03/15

Tel [phone]

Fax [phone]

www.redlion.net

MODEL PX2FCA - Analog Input FlexCards

Process Input/Remote Setpoint w/PID Control
Heater Current Monitor

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 Heat er 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 spr ing-cage ter minal 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/cont roller. 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 two­process 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 cur rent t ransformer with an out put 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 out put is OFF. This provides indication of a shorted or
open heater circuit. A direct readout of process heater cur rent can also be
displayed, if desired. Heater cur rent 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

z USE IN PAX2 WITH FlexBus™ OPTION

z FOUR SOLID STATE OUTPUTS

z INSTALL FlexCard™ OPTION CARD IN ANY OPEN SLOT

SAFETY SUMMARY

All safet y 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 con nected 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 har mful to persons or equipment in the
event of a fault to the unit.

CAUTION: Risk of Danger.

Read complete instructions prior to

installation and operation of the unit.

CAUTION:

Risk of electric shock.

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 out puts

Type: Switched DC, N Channel open drain MOSFET

Current Rating: 1 ADC max

VDS ON: < 0.2 V @ 1 A

VDS Max: 30 V DC

Offstate Leakage Current: 0.5 µA max.

4. OUTPUT POWER SUPPLY (+Vout): 18 to 25 VDC @ 40 mA maximum.

5. CERTIFICATIONS AN D 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 mm2)
Torque: 4.4-5.3 inch-lbs (0.5-0.6 N-m)

Top Terminals: Removable

Type: Spring - cage terminal block.
Wire Strip Leng th: 0.27” (7.0 mm)
Wire Gauge Capacity: 24 to 16 AWG (0.2 to 1.5 mm2) solid or stranded.

1

OUTPUT CONNECTIONS (Top Terminal Block)

Top Terminal Block

123456

Removable Terminal Block
(Install through access slot
in top of case)

OUT 1

OUT 2

OUT 3

OUT 4

COMM

654 321

+Vout

PCB Edge Fingers on Card

(front of meter)

+Vout

LOAD

OUT

COMM

INTERNAL POWER EXTERNAL POWER

OUT

COMM

LOAD

+

30 VDC
MAX

-

SETTING THE CARD ADDRESS

Each FlexCard contains a four position DIP switch, that is used to set the
FlexCard address. The address selection must be unique for each FlexCard
inser ted in the PAX2 host. The address is used only for inter nal data exchange
between the FlexCard and the host. The address of each FlexCard MUST be
set to match the PAX2 host slot location in which the card will be installed. A
four position dip switch is used to select the address using a binar y format. The
switch settings for address 1, 2, and 3 are shown.

Note: SET THE ADDRESS PRIOR TO INSTALLING THE CARD.

INSTALLATION

CAUTION: The option card and main circuit board contain static

WA R N ING: Exposed line voltage will be present on the circuit

To I n s t all:

1. Remove the main assembly from the rear of the case by squeezing both

finger tabs on the rear cover at the same time, and pulling the assembly out

of the case. Or use a small screwdriver to depress the finger tab latches and

pull the main assembly out of the case. When handling the main circuit

board assembly, hold it by the rear cover. Do not remove the rear cover from

the main circuit board.

2. Install applicable standard option cards (PAXCDS, PAXCDC, PAXCDL)

before continuing.

3. Determine the option slot location in which the FlexCard will be installed.

The FlexCard may be installed in any available option card slot. Note that

after the FlexCard top terminal case knock-out is removed from the PAX2

case (Reference Step 8), only another FlexCard with top terminals should

be installed in the option slot location.

4. Set the FlexCard Card Address DIP switch to match the option card slot

position in which it will be installed. Attach the appropriate slot location

label to the rear of the top terminal block and then remove the top terminal

block from the FlexCard.

5. Align the FlexCard rear ter minals with the rear cover slot position (address)

that the FlexCard is being installed.

6. Align the option card connector with the appropriate main circuit board

FlexCard connector.

7. Ver ify that the tab on the option card rests in the alignment slot on the main

assembly display board.

8. A knock-out on the top of the PAX2 case will need to be removed to allow

the FlexCard top ter minal block con nection to be made later. Locate the

location. Carefully remove the knock-out, being careful not to remove

additional (unused) knock-outs. Trim knock-out (gates) that remain on the

case.

9. Slide the assembly back into the case. Be sure the rear cover latches, at the

finger tab, engage in the case.

sensitive components. Before handling the cards, discharge
static charges from your body by touching a grounded bare
metal object. Ideally, handle the cards at a static controlled
clean workstation. Also, only handle the cards by the edges.
Dirt, oil or other contaminants that may contact the cards can
adversely affect circuit operation.

boards when power is applied. Remove all power to the unit
AND load circuits before accessing the unit.

shaped knock-out, positioned at the installed FlexCard option slot

Binary Bit Weights: 8 4 2 1 (Switch 1 to 4)

ON

1234

Address 1

ON

Address 2

Alignment

Slots

ON

12341234

Address 3

TOP VIEW

Main
Circuit
Board

FlexBus
Connectors

Standard Card
Connectors

Finger

Slot #

Tab

10. Make output wiring connections to the top terminal block. Install the top
terminal block by aligning it with the option card and option slot knock-out
hole. Firmly press the top ter minal block to engage the terminal block
latches. Terminal block should not pull off without depressing the terminal
block latches. Do not apply power to the controller if the top terminal block
is not in place.

12 3

Finger
Tab

Slot ID Label

Rear Terminal Block

2