Manual 85018V1
505E Digital Governor
Woodward
1
Chapter 1.
General Information
Introduction
This manual (85018) describes the Woodward 505E Digital Governor for steam
turbines with controlled extraction and/or admission pressure control. English
versions are 9907-165, 9907-166, and 9907-167. The option charts below show
the differences between the part numbers. Volume 1 of this manual provides
installation instructions, describes the control, and explains the configuration
(programming) and operating procedures. Volume 2 includes notes on applying
the control to specific applications, Service mode information, and 505E
hardware specifications.
This manual does not contain instructions for the operation of the complete
turbine system. For turbine or plant operating instructions, contact the plant-
equipment manufacturer.
Manual 85017 describes the 505 Digital Governor for steam turbines without
extraction pressure control.
Part Number Options
Part Number Power
9907-165
HVAC (180–264 Vac)
9907-166
AC/DC (88–132 Vac) or (90–150 Vdc)
9907-167 LVDC
(18–32
Vdc)
Optional Bulkhead Mounting Box (NEMA 4X) P/N 8923-439
505 controllers now utilize a special polyacrylate conformal coating material to
coat and protect their internal circuit boards from corrosive environments. This
new polyacrylate material replaces the previous silicon conformal coating and
provides an improved barrier between board components and sulfur-based
gases. 505 controls that have this coating will have a label on the side stating
“SULFUR RESISTANT CONFORMAL COATED”. All 505 controllers shipped
from Woodward with the revision letters listed below, or subsequent letters, were
shipped with the new polyacrylate conformal coating material:
Table 1-1. 505s with Polyacrylate Coated Boards
Part Number
Revision
Label on 505
9907-165 V 9907-165V
9907-166 V 9907-166V
9907-167 T 9907-167T
