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Operating instruction
Modem 1200 baud 500FSD10
EDS500 series - FSK modems
Application, characteristics and technical data have to be
taken from the hardware data sheet:
500FSD10 Data sheet 1KGT150982
Operation
The 500FSD10 modem is a voice-frequency
telegraphy unit (VFT unit) according to CCITT V.23
recommendationwhich operates according to the principle
of binary frequency shift keying (FSK). The modem can
operate in two- and four-wire connection. The mode of
operation is set by means of a twelve-fold DIP-switch.
Connections
Power connector (X1)
The EDS500 devices are equipped with a wide range
power supply for voltages between 24 and 60 Volts DC
(power consumption see device label). The connector is a
3-pin Phoenix plug with screw terminals.
Pin allocation power supply (X1)
1
Due to the internal overvoltage protection, interrupt
any connection to ground of the device for the time
of the measurement before you carry out isolation
measurements. This includes the earthing of the hat
rail as well as all shields of all transmission lines and
supply feedings. RJ-12 plugs or RJ-45 plugs can also
establish earthing via the shield.
Serial interface to DTE (X2)
The RJ-45 connector X2 forms an RS-232-D interface. If
the modem is connected to an RTU, an adapter cable has
to be used which connects the pin pairs.
Pin
Signal
2
3
1
24-60 V DC
2
Functional earth
3
GND
A D V I C E
Pin allocation serial interface DTE (RJ-45)
RS-232-D
Pin
Signal
V.24
1
DSR M1
2
DCD M5
3
DTR S1
4
GND
8
1
5
RxD C2
6
TxD D1
7
CTS M2
8
RTS S2
Interface to transmission line (X3)
In two-wire mode X3-1 and X3-2 form terminal NF1 which
is used for transmission and reception.
In four-wire mode X3-1 and X3-2 form the transmitter
terminal NF1 and X3-3 and X3-4 form the receiver pair
NF2.
NF terminals
Transmit
2-wire
NF1: X3-1 and X3-2
4-wire
NF1: X3-1 and X3-2
Pin allocation transmission line interface (X3)
Pin
Signal
1
NF1a
2
NF1b
3
NF2a
1
2
3
4
4
NF2b
Signaling
LED
Description Function
Power
Voltage
off
Supply
green
RTS
Request to
off
send
green
Signal
Direction
V.28
107
output
109
output
108.2
input
GND
-
104
output
103
input
106
output
105
input
Receive
NF1: X3-1 and X3-2
NF2: X3-3 and X3-4
Device is without
power supply
Power supply
switched on
DTE does not send
DTE requests
to send via the
modem
Related Manuals for Hitachi EDS500 Series
Summary of Contents for Hitachi EDS500 Series
- Page 1 Operating instruction Modem 1200 baud 500FSD10 EDS500 series - FSK modems Application, characteristics and technical data have to be Pin allocation serial interface DTE (RJ-45) taken from the hardware data sheet: RS-232-D 500FSD10 Data sheet 1KGT150982 Signal Signal Direction V.24 V.28...
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Page 2: Description Function
Description Function left – ‘off’ right – ‘on’ Clear to send CTS inactive both raising raise upper factors active: frequency green The CTS is 60 % of upper amplitude by 20 % switched on when frequency the carrier is being raise upper amplitude, none established. -
Page 3: Installation
The internal transformers of the 500FSD10 have waste sorting if it is no longer used. a galvanic isolation of 3 kV. If a higher level of Table 1: Other indication symbols on EDS500 series devices... - Page 4 Figure 3: 500FSD10 Label Figure 2: 500FSD10 Front plate Figure 1: 500FSD10 1 2 3 Connect DIN-rail to protection earth 1 2 3 4 Figure 4: Schematic installation drawing NF2a NF2b 500LTD01 two-wire- transmission line NF1a Receive Transmit NF1b Figure 5: Communication line connection by LF transformer (two-wire connection)
- Page 5 68280 Mannheim, Germany to purchase orders, the agreed particulars utilization of its contents – in whole or in parts – is shall prevail. Hitachi Energy does not accept forbidden without prior written consent of Hitachi any responsibility whatsoever for potential Energy.