Installation Manual

Chapter 3 Wiring Procedures Accu-Wave
3-2 TN Technologies
Wiring Instructions
You will need a 1/8 inch bladed screwdriver to connect the wires to the plug-in
connector.
Refer to the Installation Layout drawing 868637 and Wiring diagram 868641. Follow all
notes on the drawings.
To wire the gauge:
1. Loosen the retaining screw at the base of the enclosure lid, then unscrew and
remove the enclosure lid.
2. Pull the cable(s) through the conduit opening(s) in the enclosure.
3. Connect the power cable ground to the internal ground on the bracket (the
bracket is grounded to the enclosure.
4. Remove the plug-in screw-terminal connector from the board. Loosen the
terminal screws. Insert the wires and make connections as shown in the
appropriate installation wiring diagram. Tighten the screws in the plug-in
connector to secure the wires. Replace the connector on the board when all wires
are secured.
5. Screw the enclosure lid back onto the housing and tighten the retaining screw.
DC Power Wiring
The Accu-Wave is designed to operate on 24 Vdc ± 25%. The maximum input power
requirement is 12 W. As shown in this wiring diagram (868641), to connect DC power to
the main board:
1. Connect +24 Vdc to Pin 1 of the J1 connector, and
2. Connect the return for the +24 Vdc supply to Pin 2 of the J1 connector.
Note: To meet the requirements of CSA 1010.1, the input DC terminals shall be
supplied from an SELV (Safety Extra Low Voltage) source. In addition,
protective bonding (grounding) must always be provided.
4-20 mA Current Output
The current output range is programmable (refer to the Accu-Wave Operation Manual).
The maximum range is 0.4 to 20 mA and the default range is 4 to 20 mA.
Isolated, loop-powered, nominal voltage requirement is 24 Vdc for a 700 Ω load. As
indicated in the Wiring Diagram (868641), connect the +24 Vdc input to Pin 7 of the J1
connector on the main board.
Contact Closure Input
The contact switch input is dry contact input between ground and switch closed position.