Application Information

The TPMC150 is a standard single-width 32 bit PMC

module providing four (TPMC150-10R), three

(TPMC150-11R), two (TPMC150-12R) or one channel

(TPMC150-13R) of a Tracking Synchro/Resolver-To-

Digital Converter (RDC) with a converter accuracy of 2

arcmin + 1LSB.

The TPMC150 is designed for use in high performance

commercial and industrial systems. It can be used for

many applications like motor control, robot axis control,

process control, radar antenna position information, and

CNC machine tooling.

Each of the up to four RDC channels on the TPMC150

utilizes DDC's versatile state-of-the-art Tracking

Synchro/Resolver-To-Digital Converter RD-19231 with

programmable resolution. Resolution programming allows

selection of 10, 12, 14 or 16 bit conversion. This combines

the high tracking rate of a 10 bit converter with the

precision of a 16 bit converter. The RD-19231 provides

incremental encoder emulation. Encoder phase signals A,

B and Index I are fed to an on board 32 bit up-/down

encoder counter with preload and output register.

Additionally the synthesized encoder signals are available

for external use via RS485/422 output drivers. The RD-

19231 provides a 4V velocity output with a linearity of

typically 0.25%, which can be used to replace a

tachometer. A 24V isolated digital input per channel can

be used as general purpose input or as reference input.

A 'Simultaneous Read' function allows latching of the

actual values of the selected converters at the same time.

Signal Conditioning Adapters (TPMC150-Ay-xx) are

required for each channel to adapt the signal levels of the

Synchro/Resolver to the RD-19231 and to configure the

optional reference oscillator input/output. The Signal

Conditioning Adapters will be built individually to customer

specification of the Synchro or Resolver specifications,

and are factory installed on the TPMC150.

Four types of Signal Conditioning Adapters are available

to adapt the signal levels of the Synchro/Resolver to the

RD-19231: The TPMC150-A1-xxR and the TPMC150-A2-

xxR use high precision, low TK discrete resistors. These

Adapters are mainly used for resolver applications. The

TPMC150-A3-xx and the TPMC150-A4-xx use a high

precision resistor network with matched resistors. These

Adapters are mainly used for synchro applications or

resolver applications which require highest accuracy.

Additionally the TPMC150-A2-xx and the TPMC150-A4-xx

offer an on board reference oscillator with factory

selectable frequencies in the range of 2 kHz to 10 kHz.

The on board encoder counter for each channel is a 32 bit

up-/down counter with preload and output register. The

encoder counter is fed with the emulated A, B and Index

signals from the RD-19231. The counters are

programmable for single, double and quad analysis of the

incremental encoder signals. The counter can be manually

or automatically loaded with the value of the preload

register, depending on mode. An ‘Auto Rreference Mode’

provides the possibility of automatic preload of the

encoder counter during normal operation, whenever the

motion system passes the reference position. A

'Simultaneous Read' function allows latching of the actual

values of the selected encoder counters. These values

can then be read successively without interfering with

normal counter function.

The TPMC150 offers one digital 24V input per channel

which is galvanically isolated by optocouplers. A high

performance input circuit ensures a defined switching

point and polarization protection against confusing the

pole. The inputs are electronically debounced. Each of the

four digital 24V inputs can generate an interrupt, triggered

on rising or falling edge. Depending on the selected mode

the input can be used as general purpose input or as

reference input.