
6. Appendices
008-0738-00
58
TMS 9250 Product User Manual
Rev B
April 2012
© 2012 – Honeywell International Inc. All rights reserved
Step 8:
Clos
i
ng the M
e
tal Co
v
er of the SPM Box
After closing the glands, you must close the top cover of the SPM box.
Step 8a:
Replace
top Cover
Replace the top cover on the base of the SPM box.
Step 8b:
Replace
Screws
Insert the screws into the screw holes and tighten it.
6.7 APPENDIX G
Manual Supplement for TMS 9250 SPM SQUAREWAVE output Option
This supplement provides information on the operation and specifications of the TMS9250
SPM with the Square Wave Output Option
Overview
The Square Wave Output Option is a plug-in module for the SPM that converts the sine-wave
analog frequency output of the SPM to a square wave that is compatible with most RS-422
and RS-485 type inputs to data acquisition systems and frequency/pulse counters. The
frequency of the square wave is equal to the frequency of the standard sine wave output. The
square wave output is available in three formats: positive phase (TTL level), differential (+/- 5
VDC), and negative phase (TTL level, 180 degrees out of phase compared to positive phase).
Setup
The Square Wave Output Option is installed and tested at the factory. Two core shielded
cables shall be used where one end is inserted in to frequency gland and the other end of the
cable is connected to customer supplied data acquisition system (DAQ) counter or other
device. The output impedance of square wave card is 120 ohm. The following steps describe
the process of connecting the SPM option board to the DAQ or counter.
Step
Action
1
Be sure the AC/DC power supply module is not connected to a power source.
2
Place the SPM on a flat workbench or table, preferably with an ESD-safe mat
or cover to dissipate electrostatic voltages. Wear an ESD-safe grounded wrist
strap while working inside the SPM box.
3
Carefully remove the four screws of the SPM cover and slowly lift the cover
off the SPM. Take care not to damage the ribbon and ground wires
connected to the inside of the cover.
4
The square wave option module is installed just to the right of J3 and J8 on
the main circuit board. A 2-core cable connects J6 of the main board