fsk modem connections fsk modem for slc500 connections 1

fsk modem connections fsk modem for slc500 connections 1
FSK MODEM FOR SLC500 CONNECTIONS
APPLICATION NOTE # 8
1
FSK MODEM CONNECTIONS
The MARC 166-101 FSK modem for Allen-Bradley SLC500 PLCs standard factory
configuration sets up the modem for Bell 202 compatibility and for operation on a 4-wire leased
telephone line. Other modes of operation are user selectable by changing jumpers located on
the FSK Modem printed circuit board This application note describes the modem option jumpers
and connections.
The standard configuration uses port 1 (upper connector) for RS232 communication and
the RJ11 jack for the telephone line connection. Port 2 is not used.
STANDARD JUMPER CONFIGURATION
J1
3-4
7-8 P1= RS232
10-12
J2
3-4
7-8 P2= RS232
10-12
J3
J4
J5
J6
1-2
1-2
2-3
2-3
J7
1-2
P1-Pin 4 is active
J8
1-2
P2-Pin 4 is active
J10
1-3, 4-6, 7-9, 10-12, 13-15 & 16-18 P1 is DCE Pinout (see below)
P5
5-6
9-10
11-12
13-14
15-16
17-18
P1-Pin 6 is DCD
On-Line LED is DCD
P1-Pin 8 is CTS
P1-Pin 2 is Received Data
P1-Pin 7 is RTS
P1-Pin 3 is Transmit Data
P4
1-2
5-21
6-22
13-14
25-24
Error LED is enabled
Modem is enabled
DSR is HIGH
DTR Dialing enabled
On-Line LED is DCD
4-wire operation
Miille Applied Research Co., Inc.
Houston, Texas 1/800-729-0818
FSK MODEM FOR SLC500 CONNECTIONS
APPLICATION NOTE # 8
2
CONNECTOR PINOUT
Connector P1 is used for RS232 communication. The pin-out of connector P1 with
standard jumpers installed is shown below.
The connections shown below are "DCE"
connections. Connector P1 can be setup to have "DTE" connections by changing jumper J10 to
have the following connections: 2-4, 3-5, 8-10, 9-11, 14-16 and 15-17. This will effectively reverse
the signals on 2 and 3, 4 and 6 and 7 and 8. Connector P2 is always a DTE connector.
1
2
3
4
5
6
7
8
9
NC
RD
TD
DTR
GND
DCD
RTS
CTS
NC
Used only for RS422/RS-485 operation
OUTPUT Data received by modem
INPUT Data to be transmitted from modem
INPUT Data Terminal Ready
Signal reference
OUTPUT Data Carrier Detected
INPUT Request to send to modem
OUTPUT Clear to send from modem
Used only for RS-422/RS-485 operation
PHONE LINE CONNECTIONS
The RJ-11 connector is used for connection to the telephone line. A standard modular
line cord can be used for the telephone connection. The RJ-11 pin-out is shown below. When
connecting two modems back-to-back remember to reverse the transmit and receive wires so
that the transmit output of one modem goes to the receive input of the other modem.
The PTT Output can be used as a "Push-to-Talk" signal to key a radio transmitter when
using the FSK modem with a radio. The PTT output is an isolated dry relay contact output that
will be closed when the FSK modem is ready to transmit (its RTS input is high). The PTT relay is
enabled by installing jumper J12. The output can be referenced to the modems digital ground by
installing jumper J11. Standard configuration does not have the jumpers installed.
1
2
3
4
5
6
PTT Output
RX+ (Yellow)
TX+ (Green)
TX- (Red)
RX- (Black)
PTT Common
TRANSMIT LEVEL SELECTION
The transmit level is set by setting switch SW1 as shown below. For standard output
levels only one position should be on at a time. Lower output levels can be obtained by turning
on more than one switch at a time.
SW1 -1
+ 2dB
-2
0dB
-3
-2dB
-4
-4dB
-5
-6dB
-6
-8dB
-7
-10dB
-8
-12dB
Miille Applied Research Co., Inc.
Houston, Texas 1/800-729-0818
FSK MODEM FOR SLC500 CONNECTIONS
APPLICATION NOTE # 8
3
MODEM MODE SELECTION
The 7 position switch located on the modem plug-in module is used to select the
operating mode of the modem. The factory default is Bell 202 full duplex. Other operating modes
can be obtained by changing the switch settings as shown below.
1 2 3 4 5 6 7 8 OPERATING MODE
X X 1 1 1 1 1 X Bell 103 Originate, 300 bps, Full duplex
X X 1 1 1 1 0 X Bell 103 Answer, 300 bps, Full duplex
X X 1 1 1 0 1 X Bell 202 1200 bps, Half duplex
X X 1 1 1 0 0 X Bell 202, 1200 bps, Half duplex with equalizer
X X 1 1 0 1 1 X CCITT V.21 Originate, 300 bps, Full duplex
X X 1 1 0 1 0 X CCITT V.21 Answer, 300 bps, Full duplex
X X 1 1 0 0 1 X CCITT V.23 Mode 2, 1200 bps, Half duplex
X X 1 1 0 0 0 X CCITT V.23 Mode 2, 1200 bps, Half duplex with equalizer
X X 1 0 1 1 1 X CCITT V.23 Mode 1, 600 bps, Half duplex
X X 1 0 0 1 1 X CCITT V.23 Mode 1, 600 bpx, Half duplex with Soft Turn Off
X X 1 0 0 0 1 X CCITT V.23 Mode 2, 1200 bps, Half duplex with Soft Turn Off
X X 1 0 0 0 0 X CCITT V.23 Mode 2, 1200 bps, Half duplex with equalizer and Soft Turn Off
X X 0 1 1 0 1 X Bell 202, 1200 bps, Full duplex
X X 0 1 1 0 0 X Bell 202, 1200 bps, Full duplex with equalizer
X X 0 1 0 0 1 X CCITT V.23 Mode 2, 1200 bps, Full duplex
X X 0 1 0 0 0 X CCITT V.23 Mode 2, 1200 bps, Full duplex with equalizer
X X 0 0 1 1 1 X CCITT V.23 Mode 1, 600 bps, Full duplex
X= Not Used, 0= Switch OFF, 1= Switch ON
Miille Applied Research Co., Inc.
Houston, Texas 1/800-729-0818
FSK MODEM FOR SLC500 CONNECTIONS
APPLICATION NOTE # 8
4
TYPICAL CONNECTIONS
The following two diagrams detail the most common cable connections to the FSK
Modem. Other configurations are possible depending on the application. Please contact the
customer support department at the numbers listed below for assistance when building custom
cable assemblies.
166-101 PORT 1
1747-KE PORT 2
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
NC
RD
TD
DTR
GND
DCD
RTS
CTS
NC
DE-9S
NC
RXD
TXD
DTR
GND
DSR
RTS
CTS
NC
DE-9S
MARC CABLE ASS’Y
127-070-XX
FSK MODEM TO 1747-KE
SLC 503 CHAN. 0
166-101 PORT 1
NC
RD
TD
DTR
GND
DCD
RTS
CTS
NC
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
DE-9S
DE-9S
MARC CABLE ASS’Y
127-069-XX
FSK MODEM TO SLC 503
Miille Applied Research Co., Inc.
Houston, Texas 1/800-729-0818
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
NC
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