RICE LAKE 1280 Enterprise Series Single A-D Scale Card Installation Guide

1280 Enterprise Series

Single A/D Scale Card Installation

The Single A/D Scale Card (PN 164085) provides a single scale channel. The 1280 can support up to eight scales. The configuration of each scale is stored both on the card and in the indicator’s memory. The CPU board will rewrite the calibration to the A/D scale card when replacing or swapping installed cards.
There are two generations of scale cards. This document describes the first generation scale card. See Table 1 for a comparison between the scale card generations:

channel
Second Generation| Single| 220026| Blue circuit board, push button, one scale channel

Table 1. Scale Card Identification Information

Manuals are available from Rice Lake Weighing Systems at www.ricelake.com/manuals
Warranty information is available at www.ricelake.com/warranties

The included parts kit contains items used for installation of the card. Items listed for stud grounding of the shields pertain to the panel mount enclosure. See the 1280 Technical Manual (PN 167659) for more information on grounding the shield.

Table 2. Parts Kit (PN 163782)

1280 Single A/D Scale Card Installation

WARNING: Always disconnect power before opening the indicator. Option card is not hot swappable.
CAUTION: Use a wrist strap to ground yourself and protect components from electrostatic discharge (ESD) when working inside the indicator enclosure.

1. Open the indicator as instructed in the 1280 technical manual.

2.  Remove a slot cover plate from the controller assembly to open a slot for the card.

3. Remove protective tape from pins J3 on the option card prior to installation. Make sure the pins are clean of sticky
   residue by carefully wiping with a cloth dampened with rubbing alcohol.

4.  Ensure S1 switch on the card is in the Run position (Figure 2).

5. Align the card to the slot; the screw hole in the faceplate of the card should align with the screw hole on the controller assembly.

6. Slide the card into the top and bottom grooves of the slot. Push the card until it is securely seated in the back plane.

7. Secure with screw 4-40 NC x 1/4.

8.  Route the cable through the cord grip to attach the cable from the scale to the A/D scale card.

9. Wire the load cell cable from the scale to the connector (from the parts kit) for J1 as shown in Figure 2 and Table 3.
   NOTE: To use a 6-wire load cell cable (with sense wires), remove jumpers JP1 and JP2 before installing cord to J1. To use a 4-wire connection, leave jumpers JP1 and JP2 on.

10. When connections are complete, install load cell connector on the A/D scale card.
    NOTE: A sealing clip can be installed over the connector to provide a hardware seal that allows access while preventing removal of the scale card and connector.

For 6-wire load cell connections to connector J1, remove jumpers JP1 and JP2.

Table 3. Pin Assignments
NOTE: The slot of the controller assembly selected for the installation of the card determines the scale channels that can be associated to a scale number.

11. Use cable ties from the parts kit to secure loose cables inside the enclosure as needed. Ensure no excess or loose cable is left inside the enclosure.

12.  Ground the shield cable using the ground washer in the metal cord grip, or the grounding stud on the enclosure using
    cable clamp included in the parts kit. See the 1280 technical manual for more information.

13.  Tighten cord grips. Ensure cord grip nut is also tight.

14. Reassemble and power the indicator.

15.  Press on the weigh mode screen. The Main Menu displays.

16.  Press for access to the Configuration menu.
    NOTE: Access to the Configuration menu may be restricted. Refer to the 1280 technical manual for more information.

17.  Select to enter the scales menu and configure the single A/D scale card.

18. Select the scale number (1-8) to be configured from the selection field drop down list.

19. Select and set the scale to Analog Load Cell Scale. The Select Scale Hardware screen displays.

20.  Select the slot and channel desired.

21.  See the 1280 technical manual for calibration instructions.

LED Status Indicators

Table 5. LED Status Lights

Specifications

Excitation Voltage
Sense Amplifier
Analog Signal Input Range Analog Signal Sensitivity A/D Sample Rate
Input Impedance
Internal Resolution
Weight Display Resolution Input Sensitivity
System Linearity
Zero Stability
Span Stability
Input Voltage Differential Input Overload
RFI/EMI Protection| 10 ± 0.5 VDC,
16 x 350Ω or 32 x 700Ω load cells per A/D card
Differential amplifier with 4- and 6-wire sensing
–60 mV to 60 mV
0.3 uV/grad minimum @ 7.5 H 1.0 uV/grad typical @ 120 Hz 4.0 uV/grad typical @ 960 Hz
7.5–960 Hz, software selectable

35 MΩ typical
+/- 8388608 counts
9,999,999
10 nV per internal count
±0.01% of full scale
±150 nV/°C, maximum
± 3.5 ppm/°C, maximum
±800 mV referenced to earth ground
Load cell signal lines ±10 V continuous, ESD protected
Signal, excitation and sense lines protected
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© Rice Lake Weighing Systems Content subject to change without notice.
230 W. Coleman St. • Rice Lake, WI 54868 • USA USA: 800-472-6703 • International: +1-715-234-9171
www.ricelake.com
PN 164652 Rev E
October 4, 2023

References

• Rice Lake Weighing Systems
• Rice Lake Weighing Systems

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