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Connectors and signals
This section contains information on the following UCC PI 80 ports:

| Key | Description | Key | Description | 
|---|---|---|---|
| 1 | Scale 0 interface (15W HDD socket) * | 9 | UCC - EXP (RJ45 socket) | 
| 2 | Scale 1 interface (15W HDD socket) * | 10 | UCC - SPA (RJ45 socket) * | 
| 3 | Scale 2 interface (15W HDD socket) * | 11 | SPA - A (RJ45 socket) ** | 
| 4 | Scale 3 interface (15W HDD socket) * | 12 | SPA - B (RJ45 socket) ** | 
| 5 | SP80 interface (15W D socket) | 13 | MCU (9W D plug) * | 
| 6 | Machine I/O (44W HDD socket) * | 14 | Servo power amplifier / E-STOP (25W D socket) * | 
| 7 | RS232 (9W D plug) * | 15 | Earth terminal | 
| 8 | PICS (9W D socket) * | 16 | UCC PI 80 power jack (6.3 mm socket) | 
* NOTE: Only to be used when interfacing to an SPA2-2 (see the UCC BI installation guide, Renishaw part number H-1000-7602) or when using a third party amplifier (see the UCC AI installation guide, Renishaw part number H-1000-7611), otherwise the SPA3 / SPA3-2 connections should be used.
** NOTE: Only to be used when interfacing to an SPA2-2 (see UCC BI installation guide, Renishaw part number H-1000-7602).