Super Systems 7EK 31080 User Manual
Page 9
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SERIAL INTERFACE
RS-485 interface allows to connect up to 30 devices with
one remote master unit.
Fig. 9 - RS-485 WIRING
The cable length must not exceed 1.5 km at 9600 BAUD.
NOTES:
1) This is an RS485 isolated interface.
2) The following report describes the signal sense of the
voltage appearing across the interconnection cable
as defined by EIA for RS-485.
a) The ”A” terminal of the generator shall be negative
with respect to the ”B” terminal for a binary 1 (MARK
or OFF) state.
b) The ”A” terminal of the generator shall be positive
with respect to the ”B” terminal for a binary 0
(SPACE or ON)
D) POWER LINE WIRING
Fig. 10 POWER LINE WIRING
100V to 240V AC 50/60Hz (-15% to + 10% of the nominal
value).
24 V AC/DC (+ 10 % of the nominal value).
NOTES:
1) Before connecting the instrument to the power line,
make sure that line voltage corresponds to the
description on the identification label.
2) To avoid electrical shock, connect power line at the
end of the wiring procedure.
3) For supply connections use No 16 AWG or larger wires
rated for at last 75 °C.
4) Use copper conductors only.
5) Don’t run input wires together with power cables.
6) For 24 V DC the polarity is a do not care condition.
7) The power supply input is NOT fuse protected.
Please, provide it externally.
Power supply
Type
Current
Voltage
24 V AC/DC
T
500 mA
250 V
100/240 V AC
T
63 mA
250 V
When fuse is damaged, it is advisable to verify the
power supply circuit, so that it is necessary to send
back the instrument to your supplier.
8) The safety requirements for Permanently Connected
Equipment say:
- a switch or circuit-breaker shall be included in
the building installation;
- It shall be in close proximity to the equipment
and within easy reach of the operator;
- it shall be marked as the disconnecting device for the
equipment.
NOTE: a single switch or circuit-breaker can drive
more than one instrument.
9) When a neutral line is present, connect it to terminal
13.
12
13
N (L2)
L (L1)
N (L2)
L (L1)
10
9
COMMON
11
B'/B
B/B'
A/A'
A'/A
M
A
S
T
E
R
I
N
S
T
R
U
M
E
N
T
31080-1-00.p65
3/24/00, 11:58 AM
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