Red Lion PAXCDC4 (MODBUS) - Manual

1
INSTALLING AN OPTION CARD
Caution: The option and main circuit cards contain static
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.
Warning: Exposed line voltage exists on the circuit boards.
Remove all power to the meter AND load circuits before
accessing the unit.
1. Remove the main assembly from the rear of the case. Squeeze the finger
holds on the rear cover, or use a small scewdriver to depress the side
latches to release it from the case. It is not necessary to separate the rear
cover from the main circuit card.
2. Locate the option card connector for the type of option card to be
installed. Hold the unit by the rear connector, not the display board, when
installing an option card.
3. Install the option card by aligning the option card connector with the slot
in the rear cover. The cards are keyed by position with different main
board connector locations. Be sure the connector is fully engaged and the
tab on the option card rests in the alignment slot on the display board.
4. Slide the assembly back into the case. Be sure the rear cover latches fully
into the case.
5. Apply the option card label to the bottom side of the meter. Do not cover
the vents on the top surface of the meter. The surface of the case must be
clean for the label to adhere properly. Apply the label to the area
designated by the large case label.
6. See manual for wiring connections and programming procedures.
DESCRIPTION
This product bulletin covers the MODBUS Communication Card for the PAX
Meters. The card will allow the PAX Meter to transmit Display Values,
Setpoints and Reset Values via MODBUS RS485 communication, in the RTU
and ASCII modes.
MODEL PAXCDC -MODBUS OUTPUT OPTION CARD
Finger
Hold
Finger
Hold
Serial
Communications
Card
Setpoint
Output
Card
Alignment
Slots
Connectors
Main
Circuit
Board
Analog Output
or
Real-Time
Clock Card
TOP VIEW
ANALOG
OUTPUT OR
REAL-TIME
CLOCK CARD SETPOINT
OUTPUT
CARD
LABEL SERIAL
OUTPUT
CARD
LABEL
MAIN
LABEL
LABEL
ORDERING INFORMATION
MODEL DESCRIPTION PART NUMBER
PAX MODBUS Output Card
PAXCDC4C
PAXCDC40
PAXCDC
Bulletin No. PAXCDC4-F
Drawing No. LP0502
Released 09/09
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
PAX MODBUS Output Card with RJ11 Connector
MODBUS SPECIFICATIONS
1. Type: RS485; RTU and ASCII MODBUS modes
2. Isolation To Sensor & User Input Commons: 500 Vrms for 1 minute.
Working Voltage: 50 V. Not isolated from all other commons.
3. Baud Rates: 300 to 38400.
4. Data: 7/8 bits
5. Parity: No, Odd, or Even
6. Addresses: 1 to 247.
7. Transmit Delay: Programmable; See Transmit Delay explanation.