122
Appendix
Feedback on TPS channels
Positive connection
____________________________________________________________
Since the FMS, in the case of three-point step channels, adjusts the damper
until the actual value is equal to the set-point value, the feedback potentiometer
must always reliably correspond to the damper position.
The damper motor potentiometer connections must be positive interlock
connections, i.e. not able to rotate.
In addition potentiometers with high quality standards must be used
(see below).
If one of the two points is not given, two independent potentiometers (not
dual-operated potentiometers) per channel must be used for the feedback.
____________________________________________________________
Example of positive
potentiometer connection
The motor damper connection must always be a positive interlock.
Error-proof feedback
In the case of single-channel feedback of TPS outputs, only authorised
potentiometers may be used. These must be switched directly.
Examples of potentiometers
The following potentiometers are authorised for use as sole feedback in the
case of FMS, on condition that they are positively connected to the damper:
1. Novotechnik
SP-Serie
Rating: 5k
S
*
2. Contelec
PL240
Rating: 1k
S
-5k
S
*
3. Contelec
PL310
Rating: 5k
S
*
4. Contelec
PL295
Rating: 5k
S
*
5. Bourns
6639S-095-..
Rating: 5k
S
*
Other potentiometers are admissible only after consultation with
LAMTEC or the TÜV.
Examples of servomotors
Servomotors with approved potentiometer, fitted with a positive interlock
connection:
Schimpf
All motors with feedback type R1*and type R2*
Landis & Geyer
SQM series with potentiometer PL 240
Haselhofer
HD 60 D 2 with Novotechnik potentiometer
Haselhofer
HD 60 D 10 with Novotechnik potentiometer
Aris
WAN1, WAN6
Regeltechnik
Kornwestheim
ST 5102 and ST 5113
Regeltechnik
Keller
CA03 and CA12
Auma
Address enquiries to the manufacturer
KFM Regelungstechnik
4d124B
Other motors are admissible only if the potentiometer connection forms a
positive interlock or two independent potentiometers are used for feedback.
* also obtainable through LAMTEC
