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Instruction Leaflet

RS

stock no. 312-353, 312-369   

Issued April 1997

7798

Programmable 

Counter/Timer

A range of solid-state counter/timers for industrial control applications
in manufacturing, packaging and materials handling, also process
timing and monitoring functions. Made in Japan.

Easy to programme

Four timer or counter modes

Wide range of supply voltages

Choice of a.c. or d.c. operation

6-digit LCD display 

Non-significant zeros suppressed 

Up or down counting to 10

6

operations

Timing from 0.01s to 10

5

hrs

4 output, 3 input modes

Manual and remote reset facilities

Memory back-up via internal battery

Time integrating facility

Standard DIN 48 case

11-pin relay base

DIN-rail, surface mounting or panel mounting hardware available

UL and CSA approved

Dimensions

RS

stock no. 312-353 Voltage range: 24 to 240V a.c.

Omron reference: H8CA - SAL

RS

stock no. 312-369 Voltage range: 12 to 120V d.c.

Omron reference: H8CA - SDHS

Accessories

Connections

1.

ME* - enables selection timer/counter mode

2.

Supply

3.

Input common

4.

TC* - inhibits timer operation during supply failure

5.

CP2 - see timer/counter input modes

6.

CP1 - see timer/counter inputs modes

7.

R - resets the timer/counter and turns the output off

8.

See diagram (below)

9.

See diagram (below)

10. Supply
11. See diagram (below)

Counter

Operating mode N

The display increments when an input is received. On reaching the set
value the output is turned on and the display is held. This continues until
a reset is applied.

Operating mode F

Operation is for mode N except that when the set value is reached the
display continues to increment.

Operating mode C

The display increments until the set value is reached. At this point the
output is turned on for a period of approx. 0.5sec., the counter is reset,
and begins to count again.

Note:

In this mode the unit should not be used in such a way that the
set value is reached during the timed output.

Operation is as for mode C except that the count is held at zero during
the timed output period.

Operating mode R

Input mode A

CP1 count input: counter increments or decrements
when input is closed.
CP2 count direction: CP2 OFF gives count up: CP2 ON
gives count down.

Input mode B

CP1 count input: counter increments when input

0.5s

0.5s

6

5

4

3

2

1

11

10

9

8

7

8

9

11

8

9

11

7.8

3

4.5

35.4

31 max

50 max

70

max

11.M3.5 x 7.5

¯ 4.5

9

3

4

5

6

7

8

2

1

11

10

48

COUNTER/TIMER

0

RST

WRITE

63.7

0.7

13.6

44.8

78

86

6

8

Warning:

This product contains a 3V
lithium polycarbon -
monofluoride type battery which
must not be charged, cut open,
disposed of in a fire, or
subjected to direct mechanical
shock.

RS

stock no. 342-922

Panel mounting adaptor 
Omron reference:Y92F-30

RS

stock no. 342-922

DIN rail/surface-mounting screw terminal with 11-pin
socket base.
Omron reference:Y92F-30

R

CP1

T.C.

M.E.

a.c. type 

RS

stock no. 312-353

set

Figure 1

display

output

count

set

Figure 2

display

output

count

d.c. type 

RS

stock no. 312-369

* Link ME (1-3) is only required during

installation
Link TC (4-3) is an option in the timer
mode only. Do not link in counter mode.

CP2

set

Figure 3

display

output

count

set

Figure 4

display

output

count

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