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calibration and info display
Trafo 2
con. 2
Trafo 1 230 VAC
1 con. 31 3
sw 1 - 8 sw 9 - 16
sw 17 - 24 sw 25 - 32
sw 33 - 40 sw 41 - 48
sw 49 - 56 sw 57 - 64
1 con. 33 12
1 con. 23 12
1 con. 32 5
S 1 S 2 S 3 S 4
65 / 66
sw
67
7
7
W
W
E
E
I
I
G
G
H
H
P
P
R
R
O
O
C
C
E
E
S
S
S
S
O
O
R
R
3
3
4
4
8
8
2
2
P
P
R
R
I
I
N
N
T
T
L
L
A
A
Y
Y
O
O
U
U
T
T
,
,
D
D
I
I
A
A
G
G
R
R
A
A
M
M
S
S
:
:
7.1 LAYOUT AND CONNECTIONS MAIN PRINT BOARD
set- led 1 led 2 led 3 led 4
points RS port
test
24 VAC
loadcell (1 .. 7) setpoints (8 .. 12)
led signals of : RS in RS out RS/CL
RS / CL in / out
loadcell setpoints external display RS / CL 230 VAC
Loadcell / setpoint connector 33 Data connector 32
(cable type 32 TPST) (cable type 22 TPST)
1 Shield 1
RXD (black)
2 - signal (orange) 2 Short cut with pin 1 switch 65 and 66
3 + signal (red) 3 TXD (red) high (on)
Loadcell
4 + excitation (brown) 4 Short cut with pin 3
input
5 + sense (green)
RS 232
mode
5 Common (orange + brown)
6 - sense (yellow)
Shield only one side connected
7 - excitation (black)
8 Setpoint 1 ( +24 VDC in) 1
+ RXD (black)
Setpoint 9 Setpoint 2 ( +24 VDC in) 2 - RXD (brown) switch 65 and 66
output
10 Setpoint 3 ( +24 VDC in) 3 + TXD (red) down (off)
11 Setpoint 4 ( +24 VDC in) 4 - TXD (orange)
12 Common setpoints = GND
CL
mode
(5) Shield (one side only)
RXD = passive TXD = active
Connector 31 power supply Connector 23 external display
230 VAC 1 Line
Pin 1 … 12 to be connected with the e
q
ual
p
in numbers
6W 2 Neutral
of the external dis
p
la
y
t
yp
e Wei
g
htec 248.
50 / 60 Hz 3 Mass
Cable t
yp
e 112 TST
S 1 … 4 : opto couplers of the setpoint outputs (exchangeable)
Led 1 … 4: : status setpoints: led on = setpoint off
Led RS in / out : blinking off, during receipt and transmission (visible at 1200 Bd)
Transmission test : test of the comport with switch 67 down, using the test led’s and:
- switch 57 and 58 : off (1200 Bd)
- switch 61 … 64 : off (call nr. 0 = continuous transmission)
With the test switch down, both the led’s should blink synchronous
External connections are disabled during this test, the 348 is at 1200 Bd and in continuous
sending mode connected to its own receiving port.
Manual 348-2 V 3.1 Page 24 01-06-2007
230 VAC
L1 N E
o
z
24


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