Preset stage	Nameplate lettering	Model
3-stage setting	Japanese	H8BM-RA DC24
3-stage setting	English	H8BM-RB DC24
1-stage setting	Japanese	H8BM-RAD DC24
1-stage setting	English	H8BM-RBD DC24

Specifications

Model	H8BM-RA/RB	H8BM-RAD/RBD
Classification	3-stage setting	1-stage setting
Mounting method	Flush mounting
External connections	Screw terminals
Degree of protection	IP54 oil-proof type (case front)
Input mode	Up
Output mode	F mode (Operation continues even when setting is reached.)
Reset system	External, manual resets
Timer operation	Yes
Input method	Voltage inputs: High and low signal voltages (count, reset, short, counter No. selection, I/O inhibit)
Control output	No-contact outputs: RUN, forecast, machine stoppage	No-contact outputs: RUN, forecast
Display	Count, preset value, counter number, and error codes displayed on 7-segment LCD Mode, reset, I/O inhibit, re-monitor modes, and key protection displayed on LCD characters Output indication on LCD characters and LEDs
LCD with backlight	Yes
Built-in counter number	9 (counters 1 to 9) *1
Preset stage	3-stage *2	1-stage *3
Digits	Forecast value: 6 digits (999999) Pre-forecast value: -5 digits 4 Machine stoppage: +5 digits 5	Forecast value: 6 digits (999999)
Time ranges	Forecast value: 99999.9 h (0.1 h or longer)/ 99999.9 s (0.1 s or longer) Pre-forecast value: -9999.9 h/-9999.9 s 4 Machine stoppage: +9999.9 h/+9999.9 s 5	Forecast value: 99999.9 h (0.1 h or longer)/ 99999.9 s (0.1 s or longer)
Memory backup	EEPROM (Data can be written 100,000 times.), Backup time for power interruption: Approx. 10 years

*1. Each channel operates on a separate I/O.
*2. The 3-stage are pre-forecast, forecast, and machine stoppage.
Pre-forecast: Displayed only on LCD (no external output is provided).
Forecast: Displayed on LCD and LED and output (output for each counter).
Machine stoppage: Displayed on LCD and LED and output (output when the count value of one or more of counters 1
to 9 has reached its machine stoppage value).
*3. This Counter operates on the forecast value only.
*4. The pre-forecast value is set as a negative offset in respect to the forecast value.
*5. The machine stoppage value is set as a positive offset in respect to the forecast value.

Ratings

Rated supply voltage	24 VDC
Operating voltage range	85% to 110% of rated supply voltage *1
Power consumption	Approx. 1.7 W (at 26.4 VDC)
Max. counting speed	30 Hz for count inputs 1 to 7, Switchable between 30 Hz and 500 Hz for count inputs 8 and 9
Min. counting input signal width	Count inputs 1 to 7: 16.7 ms (ON:OFF = 1:1) Count inputs 8 and 9: 16.7 ms/1 ms selectable (ON:OFF = 1:1) Reset input: 100 ms max. Short input: 75 ms max. Counter number selection input: 30 ms max. I/O inhibit input: 16.7 ms max.
One-shot time	20 ms *2
Count, reset, short, counter number selection, and I/O inhibit input	Voltage input High level: 16 to 26.4 VDC Low level: 0 to 3 VDC (input resistance: approx. 2.2 kΩ)
Control output	Open-collector output: 100 mA max. at 30 VDC max.
Surrounding air temperature	-10 to +55°C (with no icing or condensation)
Ambient storage temperature	-25 to +65°C (with no icing or condensation)
Ambient operating humidity	25% to 85%
Case color	Dark gray (Munsell 5Y3/1)

*1. Ripple content: 20% max.
*2. This signal is output as a carry signal when the Counter is used as a total counter.

Characteristics

Insulation resistance		100 MΩ min. (at 500 VDC) (between current-carrying terminals and exposed non- current-carrying metal parts)
Dielectric strength voltage		1,000 VAC, 50/60 Hz for 1 min (between currentcarrying terminals and exposed non- current-carrying metal parts)
Impulse withstand voltage		1 kV (between power terminals) 1.5 kV (between current-carrying terminals and exposed non-current-carrying metal parts)
Noise immunity		±480 kV (between power terminals) and ±480 V (between input terminals), square-wave noise by noise simulator (pulse width: 100 ns/1 μs, 1-ns rise)
Static immunity		Malfunction: 8 kV; destruction: 15 kV
Vibration resistance	Destruction	10 to 55 Hz with 0.75-mm single amplitude, 2 hours each in three directions
Vibration resistance	Malfunction	10 to 55 Hz with 0.5-mm single amplitude, 10 minutes each in three directions
Shock resistance	Destruction	300 m/s² 3 times each in 6 directions
Shock resistance	Malfunction	200 m/s² 3 times each in 6 directions
Weight		Approx. 250 g (Counter only)