SEP 2005 MODEL 1000
GUIDE TO TRANSIENT PROTECTION MODULES
C-2
C.2 PART APPLICATIONS, NUMBERS, AND DESCRIPTIONS
TPMs are installed on the rear side of the GC Controller's Terminal Board for Field Wiring (TB).
The TB is available from Emerson Process Management in various premanufactured versions with
preassigned TPM installations, designed to handle specific combinations of applications. A table
that lists the premanufactured TB versions, or configurations, is provided in drawing CE-18118,
Sheet 3 (see Addendum 2, GC Controller Drawings, this manual).
There may be times when it is more appropriate to change, inspect, diagnose, or service the
individual TPMs, rather than the entire Terminal Board (TB). Consequently, this section of the
Appendix provides a guide to the individual TPMs installed on the TB, their uses, and their part
numbers (see Table C-1, following page):
Further Explanation - Individually, the TPMs can be divided into two main categories: differential
and single-ended modules. The differential modules are used with two-wire analog signals
so that both wires are protected. Single-ended modules are usually used to clamp digital
signals.
Finally, in those cases where high current or high voltage are needed for discrete outputs, a
TPM is substituted that has no protection devices.
To Next Page
Loading...
