Monarch Instrument ACT-1B Series - Manual (Page 4)

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OVERVIEW
The ACT-1B is an economical and easy to use digital tachometer that displays
rotational speed directly in RPM or RPS on a 5-digit red 0.56” high LED display
using a speed sensor providing a single (or multiple) pulse(s) per revolution. The
number of pulses per rev is factory set at time of ordering and can be user programmed
from 1 to 999 using the optional USB Programming Cable and PM Remote Software.
Power may be either universal 100 to 240 Vac (50/60Hz), or optionally, 12 Vdc or 24
Vdc isolated. The ACT-1B accepts input signals from optical, proximity, magnetic,
infrared or laser sensors, or direct TTL or external ac inputs. The ACT-1B is suitable
for panel mounting or bench top use with convenient screw terminal connections on
the rear panel of the instrument.
If specified at time of order placement, the ACT-1B may be equipped with
either an optional 4 to 20 mA current output (IO) or 0 to 5 Vdc analog output
(AO) proportional to speed, and/or a TTL pulse repeater output (PO).
INSTALLATION and POWER
The ACT-1B enclosure is a standard 1/8 DIN size requiring a 3.58” wide by
1.74” high (91x44 mm) mounting hole.
Figure 1 Dimensions in Inches (mm)
ACT Front View ACT Side View
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Appendix A - Serial Programming Commands
Programming the unit requires the optional USB Programming Cable with
associated PM Remote software and a PC running Windows XP or later
with an available USB port.
All serial commands are @ then two or more characters or words separated
by a delimiter “/”. One or two numbers follow some commands. All valid
commands respond immediately with an “OK” or data, or “ERR” if incorrect.
Default baud rate is 9600.
Communication requires the USB Programming Cable.
@PI Product Information, Shows Product name \n Firmware revision \n
@C2 Shows all settings
@D0 Sends current display value once
@D1 Sends display data continuously (at up to display update rate)
@D2 Stops sending data
@MX Sends Max reading
@MN Sends Min reading
@RE 32 Resets Max
@RE 64 Resets Min
@RE 96 Resets Max and Min
@CH_A/TYPE Shows current type
@CH_A/TYPE = RPM Sets scale to 60 so displays in RPM.
@CH_A/TYPE = FREQ Sets scale to 1 so displays in hertz.
@CH_A/TYPE = SCALE Scale mode. Enter Scale factor.
@CH_A/TYPE/SCALE = 30.00 This will set the SCALE factor to 30.00
@CH_A/INPUT
Shows sense of the trigger input
@CH_A/INPUT = POS (or NEG) Sets the sense of the input trigger
@CH_A/LOEND
Sets how long (in secs) with no pulses
before the tachometer shows 0.