EM-9421-B Rev.4
P. 2 / 3
3. INSTALLATION
Keep the ambient temperature and relative humidity within
the limit described in Chapter 2. 10 to 35
°
C (50 to 95
°
F) and 20
to 70% RH are recommended conditions for higher accuracy
requirements.
Insert the meter in pressing the both sides' retainers.
4-2) ANALOG INPUT
Connect DC input to the pin 1 - 2 of CN1. Typical configuration
is shown in Figure 4.
Figure 4. Typical connection
4-3) DECIMAL POINT POSITION
Connect terminals as shown below.
DP1 (
×
10
1
) LED ON
Connect CN2 pin 4 and pin 3
DP2 (
×
10
2
) LED ON
Connect CN2 pin 5 and pin 3
DP3 (
×
10
3
) LED ON
Connect CN2 pin 6 and pin 3
4-4) DISPLAY HOLD
When HOLD signal is applied, the display is held. With contact
input, connect a relay to the pin 1 - 2 of CN2 as shown in Figure
4. With the contact closed, the display indication is held. For
other interfaces, examples are shown in Figure 5.
48 (1.89)
45 (1.77)
24 (0.94)
4.5
(0.18)
72 (2.83)
51 (2.01)
21.8 (0.86)
Figure 2. External dimensions & panel cutout
DP3
1
2
3
4
5
6
7
8
9
D. GND
HOLD
DP COM
DP1
0V
10
24V
DP2
NC
FG
NC
1
2
3
4
5
6
7
8
9
Hi
Lo
NC
NC
NC
10
NC
NC
NC
A. GND
CN2
CN1
10
3
10
2
10
1
DP3
(LED ON)
DP1
10
0
DP2
L
HOLD
twisted-pair
cable
(a) 5V-CMOS, LSTTL
H
(b) TRANSISTOR
L
HOLD
twisted-pair
cable
(c) PHOTO-COUPLER
H
photo-
coupler
D.GND
HOLD
D.GND
HOLD
Figure 5. Hold control signal interface
45
+0.6 (1.80)
–0 (1.77)
22.2
+0.3 (0.89)
–0 (0.87)
PANEL CUTOUT
Panel thickness: 0.5 to 4 mm
(0.02" to 0.16")
4-1) POWER & FRAME GROUND
Supply DC voltage (rating
±
10%) to the pin 9 - 10 of CN2. Use
the pin 8 (FG) of CN2 for grounding when necessary. This FG
pin is connected to power (0V) through a capacitor (1000PF).
1
2
3
4
5
6
7
8
9
10
NC
DPCOM
D.GND
HOLD
DP1
DP2
DP3
FG
0V
+24V
DECIMAL
POINT
POWER
SOURCE
KEY
*
Pin No.2 (Lo) – 5 (A.GND) of CN1 and No.1 (D.GND) of
CN2 are connected internally.
They are isolated from No.9 (0V) of CN2.
**
The connectors are removable.
CN2
(lower)
1
2
3
4
5
6
7
8
9
10
Hi
Lo
NC
NC
A.GND
NC
NC
NC
NC
NC
INPUT
KEY
CN1
(upper)
ISOLATION
4. TERMINAL CONNECTIONS & ADJ.
Figure 3. Connector pin assignment
