DayTronic 5D40 사용 설명서 - 페이지 20

{카테고리_이름} DayTronic 5D40에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DayTronic 5D40 20 페이지. Panel meter, frequency conditioner module

페이지 인쇄

RANSDUCER

Each wire or jumper of the transducer cable is to be

firmly secured to the appropriate screw terminal of the

terminal block that plugs into the 5D40(V)'s 10-pin

TRANSDUCER CONNECTOR.

As shown in Figs. 8.a and 8.b, below, the Model

5D40(V)'s differential inputs (+SIGNAL and –SIGNAL)

are normally used when connecting the module to a

magnetic pickup for conventional tachometric applica-

tions. When the ±SIGNAL lines are used for direct sen-

sor connections, note that

• The TTL SIGNAL input (Terminal 7) must be tied to

–EXCITATION (Terminal 6).

• It is strongly recommended that the –SIGNAL line

be tied to the module's 0.1 µF COUPLING terminal

(as shown in Figs. 8.a and 8.b). This serves to sup-

press unwanted signal noise, especially at the low-

frequency input range.*

Fig. 8.a gives the wiring for a pickup connection via

shielded twisted-pair cable, while Fig. 8.b gives the

wiring for a pickup connection via coaxial cable. With

coaxial cabling, the shield connection is not required,

and the –SIGNAL line should be tied to EXCITATION

COMMON (Terminal 10), which then connects directly

to the sensor (as shown).

The Model 5D40(V)'s TTL input should be used when

connecting the module to any generic TTL device (Fig.

Fig. 8

Model 5D40

Transducer Connections

Fig. 8.a

Input from Magnetic

Pickup, Using

Twisted-Pair Cable

3KPLUS with 5D40 I NSTRUCTION M ANUAL V . SB.3

ONNECTIONS

8.c) or to a "zero-velocity" (true digital output) sensor

requiring 5-V excitation (Fig. 8.d). When the TTL SIG-

NAL is directly connected to the sensor, the +SIGNAL

and –SIGNAL inputs must be tied to EXCITATION COM-

MON (Terminal 10) and –EXCITATION (Terminal 6),

respectively.

ALSO NOTE: The general TTL connections shown in

Fig. 8.c should always be used when the input frequen-

cy is greater than 200 KHz or less than 2 Hz.

An additional wire is shown in Fig. 8.d connecting the

zero-velocity sensor's –EXCITATION pin and the

5D40(V)'s EXCITATION COMMON (Terminal 10). This

wire is recommended when the cable resistance is

greater than 20 ohms. When used, the additional wire

and the +EXCITATION line should make a separate

shielded twisted pair, as shown. The +SIGNAL and

main –EXCITATION lines should always be paired and

shielded.

For general information on CABLE SHIELDING, see

Section 2.B.

* The larger 10 µF COUPLING (Terminal 4) is for removal of rela-

tively large amounts of ± DC offset, and is not normally

required. Contact the factory for connection details.

SHIELDED TWISTED PAIR

MAGNETIC

PICKUP

* (NOT ISOLATED; connects

2. C

ONNECTIONS

SCREW TERMINAL BLOCK

PLUGGED INTO TRANSDUCER

CONNECTOR

internally to CHASSIS GROUND)

5D40

EXC. COMMON

+SIGNAL

–SIGNAL

TTL SIGNAL

–EXCITATION

0.10 µF COUPLING

10 µF COUPLING

+EXCITATION

[FOR FUTURE USE]

SHIELD*

3KP40 - 2.3