V125 Martel Electronics, V125 Datasheet - Page 3

• Manufacturer Part Number: V125
• Description: VOLTMETER LCD 200MV 0.5" DIG HT
• Manufacturer: Martel Electronics
• Series: Vr
• Type: Voltmeterr

Specifications of V125

• Measuring Range: 200mVDC
• Display Style: Black Characters, Grey Background
• Display Type: LCD
• Display Face Size: 1.22" L x 0.55" W (31.0 x 14.0mm)
• Display Digits: 3.5
• Display Digits - Height: 0.492" (12.50mm)
• Backlight: Without
• Mounting Type: Panel Mount
• Termination: PC Pins
• Voltage - Supply: 7 ~ 12VDC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 227-1060

PIN FUNCTIONS
1.
2.
3.
4.
5.
6.
7.
8.
Solder Links:
L1
CIRCUIT DIAGRAM
INLO
INHI
V+
V-
INHI
INLO
XDP
DP1
DP2
DP3
V+
V-
1
3
4
2
L1
V+
Normally Closed, connects COM to INLO.
Positive power supply connection.
Negative power supply connection.
Positive measuring input with reference to IN LO.
Negative measuring input with reference to IN HI.
Connect to DP1, 2 or 3 to display required decimal point.
Connect to XDP to display Decimal Point 1 (199.9).
Connect to XDP to display Decimal Point 2 (19.99).
Connect to XDP to display Decimal Point 3 (1.999).
1M
R6
100k
R5
3k
R4
1.5k
R2
100nF
300k
C3
R1
R3
220nF
100nF
68nF
C1
C2
C4
100k
C5
100pF
27
28
29
31
30
32
34
33
35
36
40
39
38
INT
BUF
A/Z
IN HI
IN LO
COM
CREF+
CREF-
REF LO
REF HI
OSC1
OSC2
OSC3
IC1
V+
V- TEST
26
1
www.martelmeters.com
POL
bc4
37
b1
d1
b2
d2
b3
d3
BP
a1
c1
e1
g1
a2
c2
e2
g2
a3
c3
e3
g3
f1
f2
f3
5
4
3
2
8
6
7
12
11
10
9
14
13
25
23
16
24
15
18
17
22
19
20
21
R10
100k
Q1
3904
V+
23
19
25
22
17
16
14
12
10
15
24
21
20
28
26
11
27
1
3
2
4
5
8
7
Analogue inputs must be no closer than 1V
to either the positive or negative supply.
a1
b1
c1
d1
e1
f1
g1
a2
b2
c2
d2
e2
f2
g2
a3
b3
c3
d3
e3
f3
g3
POL
ab4
COM
R11
100k
LCD1
LOBAT
DP1
DP2
DP3
3½ Digit LCD Voltmeter Module
18
13
199.9
19.99
1.999
9
6
R9
1M
R8
1M
R7
1M
page 3 of 4
6
7
8
5
DP1
DP2
DP3
XDP