1280 Programmable Weight Indicator and Controller

Connector Pin Diagram

Load Cells

Use the following instructions to attach the cable from a load cell or junction box to an installed A/D scale card channel.

1. 1. Route the cables.
   2. Wire the load cell cable from the load cell or junction box to the included 6 pin connector.
   3. Plug the connector into the appropriate channel of the A/D scale card.

Note: Wire the load cell cable from the load cell or junction box to connector J1 and/or J2 if using a dual A/D scale card, see Scale Card Pinout table.

! Important: The A/D scale card must be removed from the controller prior to configuring the sense line jumpers.

Note: The hardware of J2 is not populated on a single A/D scale card.

Serial Communications

The two communication ports on the 1280 CPU board support full duplex RS-232, RS-422 or RS-485 communications at up to 115200 bps.

1. 1. Route cable through the cord grip.
   2. Ground the shield wire.
   3. Remove the screw holding the face plate.
   4. Use clip to ground the front plate.
   5. Wire the cables to the connector. *See CPU Board table.
   6. Plug the wired connector into the intended serial port J6 (Port#1) or J7 (Port#2).

Serial ports are configured using the Serial menu, refer to the Interface 1280 Technical Manual Section 5.1, page 67 for configuration information. An optional dual-channel serial communications card, Kit PN 164685, is also available. Each serial option card provides two additional serial ports. Both ports on the option card can support RS-232, RS-422 or RS-485.

Note: All wiring must conform to the NEC or local ordinances.

CPU Digital I/O Wiring

Digital I/O pins are configured using the Digital I/O menu, see Section 8.0 on page 92 for configuration information. An optional 24 I/O channel card (PN 164684) is also available. Each Digital I/O option card provides an additional 24 configurable I/O bits. Alternatively, a 4-channel Relay card (PN 164689) is also available. Use the following instructions to wire to the CPU board DIO connector.

1. 1. Route cable through the cord grip, refer to the Interface 1280 Technical Manual Section 2.3.1, page 27.
   2. Ground the shield wire, refer to the Interface 1280 Technical Manual Section 2.3.2, page 28. *For a wall mount enclosure, route wires to a Relay Rack if equipped (skip Step 3 and Step 4).
   3. Remove the screw holding the face plate.
   4. Use clip to ground the front plate.
   5. Wire the cables to the connector.
   6. Plug the connector into J1 on the board.

Wiring Schematics

Key Pad Model

For proper wiring of the key pad model, see wiring diagram below.

Touch Screen Only (Virtual Keypad)

To assembly the touchscreen (virtual keypad), see below.

The HMI cable (PN 180002) plugs from J2 on the overlay card to J19 on bottom of CPU board.
Connect CPU to display cable (PN 164995 or 164970) from J9 to 7″ display.
Connect CPU to display cable (PN 180001) from J9 and J18 on the bottom of CPU board to 12″ display.

Note: Additional cable lengths are available.

For more information visit Electrical Wiring Diagrams