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| Honeywell VSI/TRA Display from TCAS-2000 System on the L-1011 |
Many of the L-1011's got upgraded with TCAS during their service time. The most commonly installed TCAS system on the L-1011 is the Honeywell TCAS-2000. I recently got my hands on a pair of Honeywell 4067644 VSI/TRA displays. The displays are vintage 1990s and will make the L-1011 simulator a lot more authentic, and, they are a lot of fun to work with. They take ARINC 429 input for both the VSI data as well as the TACAS data. The image above shows the VSI/TRA without any data sent to it, therefore, it indicates both TCAS and VSI as FAIL.
Here is a short demo of the VSI/TRA receiving Vertical Speed data from the ARINC 429 Primary bus
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From: Honeywell TCAS-2000 Installation Manual.png) |
The VSI/TRA display runs off 115V 400Hz power and can take both ARINC 429 data as well as ARINC 575 ADC data. The 575 stuff is purely analog so not so interesting for working with the flight simulator, but the ARINC 429 stuff comes in very handy. Also, the VSI/TRA comes in a 41pin as well as a 55pin version. The ones that I have are the 41 pin version; and, here is the pinout for the 41pin VSI/TRA:
| J1-1 | VS +DC REF | ARINC 575 |
| J1-2 | VS DC RATE | ARINC 575 |
| J1-3 | VS -DC REF | ARINC 575 |
| J1-4 | Primary VS (HI) | ARINC 565 |
| J1-6 | Primary VS (LO) | ARINC 565 |
| J1-5 | VS 26 VAC Ref (Hi) | ARINC 565 |
| J1-7 | Not Used | |
| J1-21 | Not Used | |
| J1-8 | VSI Valid Flag | ARINC 575/565 |
| J1-9 | 5V Lamp Dimming (LO) | |
| J1-10 | 5V Lamp Dimming (HI) | |
| J1-11 | TCAS TA/RA (B) | ARINC 429 |
| J1-26 | TCAS TA/RA (A) | ARINC 429 |
| J1-12 | VS No 1 (B) | ARINC 429 |
| J1-27 | VS No 1 (A) | ARINC 429 |
| J1-13 | Not Used | |
| J1-14 | VS No 2 (B) | ARINC 429 |
| K1-30 | VS No 2 (A) | ARINC 429 |
| J1-15 | Config Common | |
| J1-16 | VS 26 VAC Ref (C) | |
| J1-17 | CS3 | Configuration Bit |
| J1-18 | PTM Common | |
| J1-19 | PTM PWR Out -15VDC | |
| J1-20 | PTM PWR Out +15VDC | |
| J1-22 | Chassis Ground | |
| J1-23 | 115VAC 400Hz (C) | |
| J1-24 | Remote Light Sensor (LO) | |
| J1-25 | Remote Light Sensor (HI) | |
| J1-28 | Not Used | |
| J1-29 | RA Valid Out | |
| J1-31 | Source Select In | |
| J1-32 | CS0 | Configuration Bit |
| J1-33 | CS1 | Configuration Bit |
| J1-34 | CS2 | Configuration Bit |
| J1-35 | CS4 | Configuration Bit |
| J1-36 | CS5 | Configuration Bit |
| J1-37 | CS6 | Configuration Bit |
| J1-38 | CS7 | Configuration Bit |
| J1-39 | DC Ground | |
| J1-40 | 115VAC 400Hz (H) | |
| J1-41 | CS8 | Configuration Bit |
The Vertical Speed input label for the VS 1 and VS 2 sources is Label 212.
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