H7ER

H7ER

6

Calculating minimum (Rmin) and maximum (Rmax)

revolutions

Calculating the maximum number of revolutions (Rmax)

When displaying in rpm:

Rmax = 10,000 x 60/A (rpm) or 10,000 (rpm),

whichever is smaller.

When displaying in rps,

Rmax = 10,000/A (rps)

Calculating the minimum number of revolutions (Rmin)

With selector switch at DIVIDE position

Rmin = 1 (rpm or rps)

With selector switch at MULTIPLY position

Rmin = 60/A (rpm)

s WIRE-WRAP TERMINALS

The terminals used on H7E wire-wrap models have a cross

sectional dimension of 1 x 1 mm. Select one of the three

gauges of wire from the table at right. Also listed in the table

are the appropriate wiring hardware.

If the input wiring must be routed together with the power lines,

keep the length of that portion of wire running parallel with the

power lines to within 20 m (65.6 feet).

When using shielded wire, stray capacitance may occur. The

operation of the tachometer might be affected when using wires

which have a capacitance which exceeds 500 pF (about 10 m,

32.8 feet, with parallel wires of 2 mm2). Keep all wires as short

as possible.

On some H7E models, the power input terminal and the

common signal input terminal (terminals 2 and 4) are internally

short-circuited. Pay special attention to polarity when wiring

these terminals.

Keep the input wiring as short as possible.

Whenever possible, avoid routing the input wiring of the AC/DC

voltage input type in parallel with 200 to 240 VAC power lines.

s CAUTIONS CONCERNING THE H7ER TACHOMETER

s HOW TO MOUNT THE TACHOMETER

Insert the H7ER tachometer from the front of the mounting

panel. Slide the mounting bracket into place from the rear of

the panel, and tighten the knurled nut by hand. Do not use tools

(such as pliers) to tighten the nut. Excessive tightening may

damage the tachometer. Wire-wrap terminal models may be

back-mounted, by soldering the terminals to a printed circuit

board.

Installation

Wire gauge

Bit

Sleeve

Method

AWG22

2-A

2-B

Normal wire-wrap

AWG24

1-A

1-B

Normal wire-wrap

AWG26

3-A

3-B

Normal wire-wrap

In all of the above cases, the number of revolutions the

encoder transmits must fall within a calculated minimum and

maximum range. If the encoder's output exceeds or falls below

this range, the number of revolutions will not be displayed

accurately. Also, the tachometer cannot represent values

greater than 10,000, even if the calculated value indicates

otherwise.

OMRON ELECTRONICS, INC.

OMRON CANADA, INC.

One East Commerce Drive

885 Milner Avenue

Schaumburg, IL 60173

Scarborough, Ontario M1B 5V8

1-800-55-OMRON

416-286-6465

Cat. No. GC CN4A

6/98/26M

Specifications subject to change without notice.

Printed in the U.S.A.

NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches, divide by 25.4.