Dual FINCH II Installation

This article provides details for modifying an installation for a single tank truck or trailer with 2 FINCH II displays. It is a matter of eliminating the J560 sockets and cable for straight-through wiring. 

There may come a time when multiple FINCH II displays are needed for a specific application.  

Details in the application note TPM 035, Finch II Dual Compartment Lead Trailer and Single Compartment Pup with High-Level Shutdown describe installation across multiple units.

See Figures 1, 2, 3, 4 and 5 below. 
Figure 1 shows the B – DIP switch position. 
Figures 4 and 5 show the wiring modification for a single tank truck or trailer. 

Wiring Modifications for Single Unit Installation 

NOTE: The steps below work for either a TD80 or TD100 Transmitter. 

1.   The J560 sockets and cable are not required. The TD transmitters #3 and optionally #4 are connected directly to the Secondary FINCH II Display’s TD Transmitter #1 and #2 terminals. 

2.   Wiring from the Secondary FINCH II Display Pump Relay 2 COM and NO terminals to the original J560 socket pins 2 and 3 continue straight through to the junction box terminals. 

Inside the Primary FINCH II Display, B – DIP Switch 2 must be switched to the ON position. 

Figure 1: B – DIP Switch 2 Position 

Tank truck to trailer or B-Train Installation

The two diagrams below show tank truck to trailer or B-Train installations along with the modifications required for a single unit. We have broke this out based on wiring diagrams and cable diagrams.

Wiring Diagram Comparisons

The two wiring diagrams below show the modifications required to go from a dual tank truck/trailer to a single unit. The red outlines on the right image show the modifications required for a single unit. 

*Click on the image to expand. 

Dual Tank Truck/Trailer Configuration	Single Unit Modification

Cable Diagram Comparisons

The two cable diagrams below show the modifications required to go from a dual tank truck/trailer to a single unit. The red outlines on the right image show the modifications required for a single unit. 

*Click on the image to expand. 

Dual Tank Truck/Trailer Configuration	Single Unit Modification