Rice Lake 720i Manuale utente

720i/820i/920i®Programmable Weight Indicator and Controller

Analog Output Card Installation

Disconnect power before removing indicator backplate.

Use anti-static protection for grounding and to protect components from electrostatic discharge (ESD) when

working inside the indicator enclosure.

Manuals can be viewed or downloaded from the Rice Lake Weighing Systems website at www.ricelake.com/manuals

Use the following procedure to install analog output cards in 720i, 820i and 920i indicators:

1. Disconnect indicator from power source.

2. Open the indicator enclosure to access the CPU board (expansion board slots in the 920i).

3. Carefully align the large connector on the bottom of the option card with the option card slot in the indicator, outlined in

red in Figure , or .

Figure 1. CPU Card Connections

WARNING

J11

PORT 1 J9 PORT 3 J10 PORT 4 J2

J13

EXPANSION BUS

SW1

SW2

JP3

J5 J6

DIGITAL I/O

PORT 2

OPTION CARD

CONNECTOR

OPTION CARD

CONNECTOR

OPTION CARD LOCATIONS

BATTERY

J15

BOOT

MODE

SLOT 1 SLOT 2

REMOTE

SETUP

SWITCH

BATTERY

LOAD CELL SENSE

JUMPERS

J12

EXPANSION CARD SLOT

J11

COMMUNICATIONS

OPTION CARD SLOT

SW1

JUMPER ON TO ENABLE J2,

OFF TO ENABLE J11

HEARTBEAT

LED

J6 EXPANSION CARD SLOT

BATTERY

CHANNEL 1

SENSE JUMPERS

CHANNEL 2

SENSE JUMPERS

720i CPU Card – Connector J11 or J12

920i CPU Card – Connector J5 orJ6

820i CPU Card – Connector J6

PN 69089 Rev EApril 17, 2018

Analog Output Card

2 Visit our website www.RiceLake.com

4. Press down carefully on the option card until it is seated on the CPU board connector.

5. Use the screws and lock washers provided in the option kit to secure the option card to the threaded standoffs on the

CPU board.

6. Make connections to the option card as required. See Figure 2 for wiring 0-20 or 4-20 mA current 

or 0-10 VDC voltage.

7. Use cable ties to secure loose cables inside the enclosure.

8. Set the mode selection jumper (Figure 2) for voltage or current output.

9. Close the indicator according to the indicator manual.

10. Ensure no excess cable is left inside the enclosure and tighten cord grips.

11. Reconnect power tothe indicator.

12. Configure the analog output card as described on page 3.

Figure 2. Analog Output Cards

Connection to PLC Analog Input Module

If the PLC analog input uses a common ground (negative input of the analog card) and both PLC channels are connected to the

same option card, there is crosstalk and the values of the 2 inputs will be merged.

Example: If one is inputting 6 mA and the other is inputting 12 mA they will merge and each looks like it is inputting 9 mA.

6 + 12 / 2 = 9 mA

To prevent this cross talk, the PLC must have isolated grounds on the input channels.

The indicator automatically recognizes all installed option cards when the unit is powered on. No hardware-specific

configuration is required to identify the newly-installed card to the system.

920i * ALGOUTnALGOUTnALGOUTn+14

820i ALGOUT2 ALGOUT2 ALGOUT4

720i ALGOUT2 N/A N/A

Indicator Single-Channel Card

Dual-Channel Card

Channel 1 Channel 2

Table 1-1. Analog Output Card Configuration Assignments

MODE SELECT

JUMPER

CURRENT +

CURRENT –

VOLTAGE +

VOLTAGE –

J1J2

CURRENT +

CURRENT –

VOLTAGE +

VOLTAGE –

CURRENT +

CURRENT –

VOLTAGE +

VOLTAGE –

+ I1 - | + V1 -+ I2 - | + V2 -

JMP2

JMP1

CHANNEL 2

MODE SELECTION

JUMPERS

CHANNEL 1

Both channels needs to be

set for Current or Voltage

Jumper the top two pins for

CURRENT.

Jumper the bottom two pins

for VOLTAGE on each.

IMPORTANT

Single Channel Dual Channel

IMPORTANT

Analog Output Card

For 920i only:

*n = slot number (J5=slot 1, J6=slot 2).

*Dual-channel cards use the same assignment for channel 1; channel 2 is assigned ALGOUTn+14

Example:



Channel 2 of a dual-channel analog output card installed in Slot 3 (expansion board) of a 920i is assigned as ALGOUT17.

Analog Output Calibration

The following calibration procedure requires a multimeter to measure voltage or current output from the analog output module.

The analog output must be calibrated after the indicator itself has been configured and calibrated.

1. Enter setup mode and go to the ALGOUT menu (see Figure 3):

• Set SOURCE1 for the number of the scale channel used as the source for the analog output

• Set MODE1 to track either gross or net weight from that scale

• Set OFFSET to 0% for 0–10 V or 0–20mA output; set to 20% for 4–20 mA output

• Set ERRACT to specify how the analog output will respond to system error conditions

• Set MIN to lowest weight value to be tracked by the analog output

• Set MAX to highest weight value to be tracked by the analog output

• MIN NEG and MAX NEG parameters allow tracking of negative weight values.

MIN NEG - set to on to specify the minimum weight (MIN parameter) is a negative value.

MAX NEG - set to on to specify the maximum weight (MAX parameter) is a negative value.

Figure 3. Analog Output Menu

2. Connect multimeter to connector J1 on the analog output card:

• For voltage output, connect voltmeter leads to pins 3 and 4

• For current output, connect ammeter leads to pins 1 and 2

3. Adjust zero calibration: Scroll to the TWZERO parameter. Press to view zero value, then check voltage or current

reading on multimeter. Use the numeric keypad to adjust the zero value up or down.

Note

number

SOURCE

PROG

OFFSET

20%

ERRACT

SCALE n

FULLSC

HOLD

ZEROSC

TWZERO

59650

TWSPAN

MODE

GROSS

NET

If SOURCE1≠ PROG

n = slot number of analog output card

ALGOUTn

ALGOUTn+14

If dual-channel card

installed

number

10000

MIN

number

000000

MINNEG

OFF

MAX

OFF

MAXNEG

SCALES SERIAL FEATURE PFORMT SETPTS DIG I/O VERS

ALGOUT

230 W. Coleman St. • Rice Lake, WI 54868 • USA

U.S. 800-472-6703 • Canada/Mexico 800-321-6703 • International 715-234-9171 • Europe +31 (0)26 472 1319

Rice Lake Weighing Systems is an ISO 9001 registered company.

www.ricelake.com

PN 69089 Rev E

April 17, 2018

4. Adjust span calibration: Scroll to the TWSPAN parameter. Press to view span value, then check voltage or current

reading on multimeter. Use the numeric keypad to adjust the span value up or down.

5. Final zero calibration: Return to the TWZERO parameterand verify thatthe zero calibration has not drifted. Use the

numeric keypad to adjust the zero value as required.

6. Return to normal mode.

Analog output function can be verified using test weights.

For dual-channel cards, repeat calibration steps for the second (J2) connector.

See the indicator manuals for more configuration information.

920i Manual (PN 67887)

820i Manual (PN 93018)

720i Manual (PN 103121)

Specifications

Resolution 16-bit, monotonicity over temperature

Linearity ±0.03% of full scale input

Current Output 0–20 mA or 4–20 mA (20% offset)

Maximum Load Resistance840 

Power Consumption 3.9W (max. load @ 20 mA)

Voltage Output 0–10 VDC

Minimum Load Resistance 1.1 K

Input Protection Short circuit protection, 300W transient voltage suppression

Protection for ESD, EFT (electrical fast transients), tertiary lightning, and system-generated

transients per IEC 60001-4-2, 60001-4-4, and 60001-4-5; European Standards EN50082 

and EN61000-4

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