Alternate Positioner Control Options; Figure 3-4 Data Input Controls; Figure 3-5 Back - Discrete Input Controls; Table 3-1 Pelco D Auxiliary Command List - Will Burt PositionIt PI-75 Operator's Manual

R C
ACKMOUNT ONTROLLER

3.5 Alternate Positioner Control Options

The Rackmount Controller allows for third party controls to be integrated into the system
through the RS485 input, the USB input, or the 8-pin terminal block connector. The RS485 and
USB inputs are both data-controlled inputs (see Section 2.7.1) and require a Pelco D compatible
device/GUI to control the positioner. The 8-pin terminal block connector is a series a digital
discrete inputs that can control the positioner through a customer supplied closed contact switch
(see Section 2.7.3).
A full list of Pelco D supported commands that are compatible with Will-Burt positioners are
detailed in the positioner's product manual. Additional Pelco D Auxiliary commands for
controlling the discrete outputs are detailed in Table 3-1.
Command
Auxiliary On
Auxiliary Off
* "nn" Variable Hexidecimal Aux number value; "nnn" Variable Decimal Aux value
** ""xx" Variable Hexidecimal Checksum value; "xxx" Variable Decimal Checksum value
3-4
RS485 USB
Input Input

Figure 3-4 Data Input Controls

Discrete Inputs
(8-pin)
Figure 3-5 Back – Discrete Input Controls
Op Code Hex Code
09 FF 01 00 09 00 nn xx
0B FF 01 00 0B 00 nn xx

Table 3-1 Pelco D Auxiliary Command List

Original Instructions
Decimal Code
255 001 000 009 000 nnn xxx
255 001 000 011 000 nnn xxx
PM-01005-REV 2
May 2021