Rice Lake 720i User manual

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
1
11
J5 J6
J7
DIGITAL I/O
J8
PORT 2
OPTION CARD
CONNECTOR
OPTION CARD
CONNECTOR
OPTION CARD LOCATIONS
J1
1
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
J9
SW1
JUMPER ON TO ENABLE J2,
OFF TO ENABLE J11
HEARTBEAT
LED
J7
J8
J6 EXPANSION CARD SLOT
BATTERY
4
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
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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
I
V
CURRENT +
CURRENT –
VOLTAGE + VOLTAGE –
J1J2
CURRENT +
CURRENT –
VOLTAGE +
VOLTAGE –
CURRENT +
CURRENT –
VOLTAGE +
VOLTAGE –
+ I1 - | + V1 -+ I2 - | + V2 -
JMP2
I
V
I
V
JMP1
J3
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
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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
Note
number
40
number
SOURCE
PROG
OFFSET
20%
0%
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
ON
MIN
number
000000
MINNEG
ON
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 [phone]
Rice Lake Weighing Systems is an ISO 9001 registered company.
© Rice Lake Weighing Systems Specifications subject to change without notice.
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