Em32-1b, Round hole mounting lcd voltmeter, Pin functions jumper links solder link l1 – Martel Electronics EM32-1B User Manual
Page 3: Circuit diagram
EM32-1B
Martel Electronics Corporation
3
PIN FUNCTIONS
JUMPER LINKS
Solder LINK L1
0V
Negative power supply to the meter.
V+
Positive power supply to the meter.
IHI
Positive measuring input.
IHI must be no closer than 1.5V to either the positive or negative supply.
ILO
Negative measuring input.
ILO must be no closer than 1.5V to either the positive or negative supply.
J1
Connects ILO to COM, when jumper link is fitted.
J2
Connects ILO to 0V, when jumper link is fitted.
CIRCUIT DIAGRAM
EM32-1B
Round Hole Mounting LCD Voltmeter
J1
J2
7
IC2
7660
6
2
5
C2'
1.5uF
C1'
1.5uF
4
8
3
Ra
RB
0V
ILO
IHI
V+
L1
Default configuration
Re-configured
L1
L1
Solder Link L1 is used to select to power supply mode of the
EM32-1B.
With L1 in the default configuration, the module operates from a
3.5 to 6.5Vd.c. supply, and measurements can be made with
respect to power supply 0V.
When L1 is re-configured, the module operates from a 7.5 to
14.0Vd.c supply. The voltage being measured must then be
floating with respect to the meter's power supply.
Page 4 of 4
Page 3 of 4
www.lascarelectronics.com
Specifications liable to change without prior warning
EM32-1B
Issue 3
August/2004
R.C.
Applies to EM32-1B/2
PIN FUNCTIONS
JUMPER LINKS
Solder LINK L1
0V
Negative power supply to the meter.
V+
Positive power supply to the meter.
IHI
Positive measuring input.
IHI must be no closer than 1.5V to either the positive or negative supply.
ILO
Negative measuring input.
ILO must be no closer than 1.5V to either the positive or negative supply.
J1
Connects ILO to COM, when jumper link is fitted.
J2
Connects ILO to 0V, when jumper link is fitted.
CIRCUIT DIAGRAM
EM32-1B
Round Hole Mounting LCD Voltmeter
J1
J2
7
IC2
7660
6
2
5
C2'
1.5uF
C1'
1.5uF
4
8
3
Ra
RB
0V
ILO
IHI
V+
L1
Default configuration
Re-configured
L1
L1
Solder Link L1 is used to select to power supply mode of the
EM32-1B.
With L1 in the default configuration, the module operates from a
3.5 to 6.5Vd.c. supply, and measurements can be made with
respect to power supply 0V.
When L1 is re-configured, the module operates from a 7.5 to
14.0Vd.c supply. The voltage being measured must then be
floating with respect to the meter's power supply.
Page 4 of 4
Page 3 of 4
www.lascarelectronics.com
Specifications liable to change without prior warning
EM32-1B
Issue 3
August/2004
R.C.
Applies to EM32-1B/2