
22 880 Technical/Service Manual
2.11 Digital I/O
Digital inputs can be set to provide many indicator functions, including all keypad functions except MENU. Digital
inputs are active (on) with low voltage (0 VDC), inactive (off) at 5 VDC. Use the DIGIO menu to configure the
digital inputs.
Digital outputs are typically used to control relays that drive other e
quipment. Outputs are designed to sink, rather
than source, switching current. Each output is a normally open collector circuit, capable of sinking 24 mA when
active. Digital outputs are active when low or at 0 VDC, with reference to the 5 VDC supply.
Use the DIO menu to set the function of
the DIO pins to OUTPUT, then use the SETPTS menu to configure the
digital outputs.
Table 2-4 shows the pin assignments for connector J2.
Table 2-4. J2 Pin Assignments (Digital I/O)
Connector Pin Signal
J2 1 5VDC, 500mA max
2 GND
3 DIO1
4 DIO2
5 DIO3
6 DIO4
2.12 Legal for Trade Sealing
An optional sealing kit (PN 153660) is available for Legal for Trade units.
Load Cell Locking Clip (PN 158402)
6-32 x 1/4 inch
Fillister Head Screw
(PN 158207)
Sealing Wire
Not included
Figure 2-16. Sealing Components
1. Remove the left bottom screw from the backplate as shown in Figure 2-17.
2. Slide the load cell sealing clip over the load cell connector
.
Figure 2-17. Remove Existing Screws
3. Secure with one of the fillister head screws provided in the kit.
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