Honeywell TotalPlant LCN - Trend Pen Assembly Removal and Replacement

LCN System Installation A-4 9/96
A.4
A.4 TREND PEN ASSEMBLY REMOVAL AND REPLACEMENT
The trend pen recorders, up to three, and the power/interface chassis are mounted in a
separate assembly, above the CRT shroud. Mounting brackets and M5 hex-head screws
are used to secure it in place. To remove and replace the recorders, refer to the
Universal Station Service in the LCN Service-1 binder or Universal Station
X
Service in the
Universal Station
X
binder. The standard trend-pen cable connections are shown in Figure
A-3.
SIO
TREND Pen
Controller
SIOI_O
E
Signal
Distribution
Board
K2LCN
Node
Processor
J1 J7
U
P
P
E
R
L
O
W
E
R
Upper Tier
Lower Tier
Fan
s
TR1
(3 Pens)
TR2
(3 Pens)
TR3
(2 Pens)
TR1
(3 Pens)
TR2
(3 Pens)
TR3
(2 Pens)
J4
J5
J6
J3
J2
J1
J4
J5
J6
J8
J1
J2
J3
AC
Power
Distribution
Board
From
Power
Entry
Panel
J7
Calibrate
Switch &
Chart
Drive
Option
Switch
J8
From
SIOI_OE
Board in
Adjacent
US
Located in Chassis above Display CRT
Backplane
10463
Figure A-3 — Trend Pen Recorder Cabling