Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 47)

Publication 900-UM007D-EN-E - January 2011
Preparations 2-9
900-TC8 (Series B) Case Removal while Panel-Mounted
The control unit can be removed from its case whether or not it is mounted on
the control panel. This allows you to perform maintenance or to add option
units without opening the control panel enclosure or removing the terminal
compartment.
Figure 2.9 — 900-TC8 (Series B) Case Removal while Panel-Mounted
1. Insert a flat-blade screwdriver into the two tool insertion holes (one on
the top and one on the bottom) to release the hooks.
2. Insert the flat-blade screwdriver in the gap between the front panel and
the rear case (two on the top and two on the bottom), and use it to pry
and pullout the front panel slightly. Then, pull out on the front panel
gripping both sides. Be sure not to impose excessive force on the panel.
Setting Up the 900-TC8 Controller with the Optional Units
If RS-232, RS-485 communications inputs are required, mount the RS-232
communications unit (Cat. No. 900-TC8232), the RS-485 communications
unit (Cat. No. 900-TC8COM), or the event input unit (Cat. No.
900-TC16EIM) in the Bulletin 900-TC8 controller. These units provide optical
isolation (approx. 32V DC) between the controller electronics and field input.
IMPORTANT
Ensure controller and I/O power is OFF before removing
the internal mechanism. When you remove the internal
mechanism from the housing, never touch electric
components inside or subject the internal mechanism to
shock.
(1)
(2)
(3)
(1)
Tool Insertion
Holes
2.0 0.4 5.0
Flat-blade Screwdriver
(Unit: mm)
Gap
Top View
Front
Panel
Rear
Case