User manual

ManualsBrandsWACHENDORFF ManualsPanel-Mount InstrumentsMeter 0 -25 k Hz

3.0 WIRING THE METER

2.0 SETTING THE DIP SWITCHES

SETTING THE 8 DIP SWITCHES

To access the switches, remove the right side plate of the meter. A bank of

eight switches is located inside the unit.

Warning: Exposed line voltage exists on the circuit boards.

Remove all power to the meter and load circuits before accessing

inside of the meter.

SWITCH 1 (Input A)

LOGIC: Input A trigger levels V

= 1.25 V max.; V

= 2.75 V min.;

MAX

= 28 VDC

MAG: 200 mV peak input sensitivity; 100 mV hysteresis; maximum voltage:

40 V peak (28 Vrms); Must also have SRC switch ON. (Not recommended

with counting applications.)

SWITCH 2 (Input A) {See Note 1}

SNK.: Adds internal 7.8 K pull-up resistor to +12 VDC, I

MAX

= 2.1 mA.

SRC.: Adds internal 3.9 K pull-down resistor, 7.2 mA max. @ 28 VDC max.

SWITCH 3 (Input A)

HI Frequency: Removes damping capacitor and allows max. frequency.

LO Frequency: Adds a damping capacitor for switch contact bounce. Limits

input frequency to 50 Hz and input pulse widths to 10 msec.

SWITCH 4 (Input B) {See Note 1}

SNK.: Adds internal 7.8 K pull-up resistor to +12 VDC, I

MAX

= 2.1 mA.

SRC.: Adds internal 3.9 K pull-down resistor, 7.2 mA max. @ 28 VDC max.

SWITCH 5 (Input B)

HI Frequency: Removes damping capacitor and allows max. frequency.

LO Frequency: Adds a damping capacitor for switch contact bounce. Limits

input frequency to 50 Hz and input pulse widths to 10 msec.

SWITCH 6 (RESET/USER INPUT) {See Note 1}

SNK.: Adds internal 7.8 K pull-up resistor to +12VDC, I

MAX

= 2.1 mA.

SRC.: Adds internal 3.9 K pull-down resistor, 7.2 mA max. @ 28 VDC max.

SWITCH 7 (POWER UP RESET)

ENABLE: In this position, the counter resets to zero at power up.

DISABLE: In this position, the counter does not reset at power up.

Note: This switch has no function for programmable models. Power-up reset is

selected through a programming parameter.

SWITCH 8 (Input B)

DIRECTION CONTROL: In this position Input B is used to control the

count direction of Input A when Input A is set to Count with Direction

mode (default mode).

INTENSITY ADJUST: In this position Input B is used to adjust the

LED intensity. There are five distinct LED levels that can be changed by

pulsing Input B. After setting the desired intensity, move switch to

OFF position for Direction Control. Units with keypads can program the

LED intensity level using Programming Menu 3.

Note 1: When the DIP switch is in the SNK position (OFF), the input is

configured as active low. When the switch is in the SRC position (ON), the

input is configured as active high.

SNK.

HI FREQ.

Reset/User Input SNK.

Pwr Up Reset DISABLE

Input B Direction Control

SRC.

LO FREQ.

SRC.

ENABLE

Intensity Adjust

Factory Setting

SNK.

LOGIC

SRC.

MAG.

Input A

Input B

EMC INSTALLATION GUIDELINES

Although this meter is designed with a high degree of immunity to Electro-

Magnetic Interference (EMI), proper installation and wiring methods must be

followed to ensure compatibility in each application. The type of the electrical

noise, source or coupling method into the meter may be different for various

installations. The meter becomes more immune to EMI with fewer I/O

connections. Cable length, routing, and shield termination are very important

and can mean the difference between a successful or troublesome installation.

Listed below are some EMC guidelines for successful installation in an

industrial environment.

1. The meter should be properly connected to protective earth.

2. Use shielded (screened) cables for all Signal and Control inputs. The shield

(screen) pigtail connection should be made as short as possible. The

connection point for the shield depends somewhat upon the application.

Listed below are the recommended methods of connecting the shield, in order

of their effectiveness.

a. Connect the shield only at the panel where the unit is mounted to earth

ground (protective earth).

b. Connect the shield to earth ground at both ends of the cable, usually when

the noise source frequency is above 1 MHz.

c. Connect the shield to common of the meter and leave the other end of the

shield unconnected and insulated from earth ground.

3. Never run Signal or Control cables in the same conduit or raceway with AC

power lines, conductors feeding motors, solenoids, SCR controls, and

heaters, etc. The cables should be ran in metal conduit that is properly

grounded. This is especially useful in applications where cable runs are long

and portable two-way radios are used in close proximity or if the installation

is near a commercial radio transmitter.

4. Signal or Control cables within an enclosure should be routed as far as possible

from contactors, control relays, transformers, and other noisy components.

5. In extremely high EMI environments, the use of external EMI suppression

devices, such as ferrite suppression cores, is effective. Install them on Signal

and Control cables as close to the unit as possible. Loop the cable through the

core several times or use multiple cores on each cable for additional protection.

Install line filters on the power input cable to the unit to suppress power line

interference. Install them near the power entry point of the enclosure. The

following EMI suppression devices (or equivalent) are recommended:

Ferrite Suppression Cores for signal and control cables:

Fair-Rite # 0443167251 (RLC# FCOR0000)

TDK # ZCAT3035-1330A

Steward # 28B2029-0A0

Line Filters for input power cables:

Schaffner # FN610-1/07 (RLC# LFIL0000)

Schaffner # FN670-1.8/07

Corcom # 1 VR3

Note: Reference manufacturer's instructions when installing a line filter.

6. Long cable runs are more susceptible to EMI pickup than short cable runs.

Therefore, keep cable runs as short as possible.

7. Switching of inductive loads produces high EMI. Use of snubbers across

inductive loads suppresses EMI.

Snubber: RLC# SNUB0000.