Hioki RM3545 - Page 7

7
Ability to extend measurement cable length
The new instruments feature better wiring resistance tolerances than pre-
vious models (the 3541 and 3540). Wiring resistance can now be as high
as 1.5 Ω for the RM3545 and 2 Ω for the RM3544.
Communications Monitor Function for smooth
systems development
The Communications Monitor Function displays communications data (re-
ceived commands and sent data) on the screen, providing valuable support
for programming of programmable logic controllers (PLCs).
Functionality for verifying the EXT I/O connec-
tion status and testing EXT I/O
In addition to allowing you to check EXT I/O signal input on the instrument’s
screen, this functionality allows you to turn output signals on or off as desired.
This capability simplies verication work during PLC programming.
Communications
Monitor screen
EXT I/O test
function screen
High-speed, comprehensive
productivity support
• The RM3545 and RM3544-01 deliver the speed demanded by automatic
testing equipment at a sophisticated level. The entire process from the
start of measurement to outputting of the judgment result takes as little
as 2.2 ms
*1
(RM3545) and 18 ms (RM3544-01). One cycle of operation,
lasting from measurement to judgment output, completes within this
time.
*1
When the measurement current is set to “High”.
• The instrument’s USB interface can also be used.
• The RM3545 and RM3544
-01 support RS-232C data communications at
up to 115.2 kbps
*2
.
• The EXT I/O output mode can be switched between judgment mode and
BCD mode.
*2
With some computers, large error components may prevent fast transfer speeds (baud
rates) from being used. In this case, change the speed to a lower setting.
A switch on the rear panel is used to toggle the input signal polar-
ity between NPN (sink output support) and PNP (source output
support) settings depending on the PLC common polarity.
EXT I/O Input and Output Circuits
EXT I/O polarity
(Select NPN/PNP)
The handler interface (EXT I/O) is isolated from measurement circuitry, control
circuitry, and the protective ground (chassis ground), providing a high level of
noise resistance.
Handler (EXT I/O) interface
RM3544-01
Input Signals:
TRIG(IN0), KEY_LOCK, 0ADJ, PRINT(IN1), LOAD0 to LOAD3,
BCD_LOW
Output Signals:
[Judgment mode] EOM, ERR, INDEX, HI, IN, LO, OUT0 to OUT2
[
BCD mode] EOM, ERR, IN, HILO, BCDm_n
*
, RNG_OUT0 to
RNG_OUT3
*
Indicates the nth bit of the mth digit.
RM35 44
EXT I/O Signal List
RM3545
Input Signals:
TRIG(IN0), CAL, KEY_LOCK, 0ADJ, PRINT(IN1), MUX, SCN_STEP,
LOAD0 to LOAD5, BCD_LOW
Output Signals:
[Judgment mode] EOM, ERR, INDEX, HI, IN, LO, T_ERR, T_
PASS,
T_FAIL, BIN0 to BIN9, OB, OUT0 to OUT2
[
BCD mode] EOM, ERR, IN, HILO, BCDm_n
*
, RNG_OUT0 to
RNG_OUT3
*
Indicates the nth bit of the mth digit.
RM35 45
RM35 44RM35 45
EXT I/O Electrical Specications
Inputs:
Photocoupler isolation: Non-voltage contact inputs
(support for current sink output)
Input ON: Residual voltage: Max. 1 V @4 mA
Input OFF: Open Max. 100 μA
Outputs:
Photocoupler-isolated open drain output (no-polarity)
DC30Vmax, DC50mAmax/ch
Residual voltage: Max. 1 V @50 mA, or 0.5 V @10 mA
External power output:
Output voltage : Sink output support: 5.0V±10%,
Source output support: -5.0V±10%
Max. output current
: 100mA
ISO_COM
10Ω
RM3545/-01/-02
RM3544-01
Output Circuit
Internally Isolated
Common
Max. 50 mA DC
Zener voltage
= 30 V
Output
RM3545/-01/-02
RM3544-01
ISO_COM
1kΩ
NPN
PNP
2kΩ
Input Circuit(when using NPN)
Input
Internally Isolated
Common
EXT I/O
MODE
SELECTOR
Easy integration into automatic testing equipment
(RM3545/-01/-02, RM3544-01)
When designing a control system using the EXT
I/O interface, be sure to read
the instruction manual and check the necessary
technical information.