HORNER CGM750 Installation instructions

1PRODUCT DESCRIPTION
The Industrial Modem (CGM750) is a rugged industrial telephone modem designed for operation in harsh
environments. The modem supports all standard Hayes AT commands and S-registers; it can be set-up
as an external modem on any PC. The CGM750 is compatible with any telecommunications or dial-up
networking software. The board contains:
•Modem and DAA chip set
•RJ11 Jacks –Two AMP 520425-2 RJ11 jacks are provided. One jack is for Line and one is for
Handset (Phone).
•RS-232 Port
•Switching DC to DC power supply
2SPECIFICATIONS
Table 1 –CGM750 Specifications
Telephone Line
Max. Data Rate 14.4 kbps (V.32)
Compatibility V.32bis, V.32, V.22bis, V.22, V.23, V.21, Bell 212A and Bell 103
Data Compression V.42bis and MNP 5 (default = disabled)
Error Correction V.42 LAPM and MNP 2-4 (default = disabled)
Ringer Equivalent 0.1
Line Jack RJ11
Phone Jack RJ11
RS-232 Port
Max. RS232 Rate 115.2 kbps
RS232 Signal Support TXD, RXD, CTS, RTS, DCD, DTR, DSR, RI, GND
RS232 Connector DB9 female, RS232
Command Set All standard AT and S register commands
General Characteristics
Input Supply Voltage 8 –30 VDC
Steady State Current 80mA @ 24VDC (typical)
Certification FCC Part 68 US: HRNMD01AHE200CGM,
and Industry Canada ICCS-03
Operating Temperature 0 to 60 degree C.
Storage Temperature -40 to 85 degree C.
Humidity 5 to 95% RH (Non-condensing)
Mounting DIN rail
Dimensions 6.25” (158.75mm) x 3.12” (79.25mm) x 1.61” (40.89mm)
18 August 2003 MAN0700-03
SmartLnx
Industrial Modem
HE200CGM750
Products Specifications and Installation Data

PAGE 218 AUG 2003 MAN0700-03
3INSTALLATION
3.1 Dimensions
Figure 1 –CGM750 Dimensions
400CGM001
6.25” (158.75mm)
1.61” (40.89mm)
3.12” (79.25mm)
8-30VDC PWR

MAN0700-03 18 AUG 2003 PAGE 3
3.2 Connectors , Wiring, and Ports
a. Connectors
Figure 2 –CGM750 Connectors and Ports
Figure 3 –Line and Phone Jack Connectors
Figure 5 –RS-232 Figure 6 –LEDs
Table 2
-
Line and
Phone Jack Pin-
outs
1NC
2NC
3RING
4TIP
5NC
6NC
1 6
Line
and Phone
Table 3
–
Power Connector Pins
(Earth Ground Screw Connection)
Pin Signal Description
1V-Input power
supply ground
2NC
3NC
4NC No Connect
5V+ Input power
supply voltage
1 2 3 4 5
Figure 4 –Power Connector
Table 4
–
RS
-
232 Port Pins
Pin Signal Description Direction
1DCD Data Carrier Detect Out
2RXD Received Data Out
3TXD Transmitted Data In
4DTR Data Terminal
Ready In
5GND Ground-
6DSR Data Set Ready Out
7RTS Request to Send In
8CTS Clear to Send Out
9RI Ring Indicate Out
Table 5
-
LEDs
DCD Data Carrier Detect –Modem has
detected carrier on phone line
OH Off Hook Indicator –Phone line is
engaged
RX Receive Data–Flashes as data is
received from the phone line
TX Transmit Data–Flashes as data
is sent out the phoneline
PWR Power –On when power is
present
TX RX DCD OH PWR
LINE HANDSET
DCD
RX OH TX
MODEM
-
+
P
W
R
8-40VDC PWR
SmartLnx
Industrial Modem
004CGM002
RS
-
232
LEDs
Pin 9
Pin 1
8-30VDC PWR

PAGE 418 AUG 2003 MAN0700-03
b. RS-232 Cable Wiring
Figure 7-Modem to PC Cable
Figure 8 -Modem to OCS
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
CTS
RXD
TXD
DTR
GND
DSR
RTS
R1
DCD
CTS
RXD
TXD
DTR
GND
DSR
RTS
9 PIN DB
DCD
R1
9 PIN DB
9-PIN
PC COM
CGM
RS-232
004CGM004
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
CTS
RXD
TXD
DTR
GND
DSR
RTS
R1
DCD
CTS
RXD
TXD
DTR
GND
DSR
RTS
9 PIN DB
DCD
NC
NC
NC
NC
R1
9 PIN DB
OCS
CGM
004CGM003

MAN0700-03 18 AUG 2003 PAGE 5
c. RJ-45 Cable Wiring
Figure 9 -Modem to OCS RJ-45
d. Phone/Line RJ11 Jacks
Connect analog phone lines to the RJ-11 jacks as appropriate. One RJ-11 jack is provided to connect
directly to a telephone (optional), and the second RJ-11 jack functions as the connection to the telephone
network.
Note: For optimum noise immunity, it is recommended that the telephone line be carefully routed
away from higher voltage and electrically noisy cables and devices.
4MODEM CONFIGURATION
a. Default Configuration
The CGM750 modem is pre-configured at the factory to automatically receive calls, and communicate
locally with many common automation devices (PLCs, etc.).
For this reason, the default factory modem init string is AT&D0&K0S0=1Q1, which causes the modem to
ignore its DTR input, turn off handshaking flow control, enable auto-answer after one ring, and turn off
result codes.
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
TXD
-SD/R
+5V
+5V
0V
0V
RXD
+SD/R
CTS
RXD
TXD
DTR
GND
DSR
RTS
RJ-45
DCD NC
NC
NC
R1
9 PIN DB
OCS
CGM
004CGM005
NC
NC
NC NC
NC
NC
NC
NC

PAGE 618 AUG 2003 MAN0700-03
b. Using the CGM750 with an OCS for programming (Default Configuration)
The CGM750 modem is pre-configured at the factory for connection to an OCS programming port, so the
OCS can answer calls received from a remote PC running the Cscape programming software.
For this reason, the default factory modem init string is AT&D0&K0S0=1Q1, which causes the modem to
ignore its DTR input, turn off handshaking flow control, enable auto-answer after one ring, and turn off
result codes.
If these default configuration settings are incorrect for your application, they can be modified using any
terminal program. Simply type in the appropriate modem commands to modify the modem settings as
required. For example, to enable result codes, type ATQ0 into the terminal program. When the modem
has been reprogrammed as desired, type AT&W0 into the terminal program to store the settings in
retentive memory. The CGM750 supports the standard AT modem command set. Contact Technical
Support for full details on the AT modem command set.
c. Using the CGM750 with an OCS for real-time data exchange
The default settings will not work if OCS modem INIT, DIAL or ANSWER ladder function blocks are used
to initialize, dial out or to answer a call from another OCS. If the OCS is using the modem in this way,
modem result codes must be enabled (via the ATQ0 modem command).
When a positive edge occurs at the power flow input to an OCS modem INIT, DIAL or ANSWER function
block, first the +++ escape sequence is sent to the modem to force it into command mode, then the
ATE0S0=0V0X0&C1&D2 init string is sent to the modem, followed by the appropriate additional INIT,
DIAL or ANSWER modem command, as programmed into the function block.
The ATE0S0=0V0X0&C1&D2 init string tells the modem: don’t echo, don’t auto-answer, produce numeric
/ simple result codes, indicate connection by activating the DCD output, and hang up if the DTR input
becomes inactive. Unfortunately, the V0X0 portion of the init string does not override the default Q1
setting, so the user must either pre-configure the modem with ATQ0 or must employ a SEND function
block in ladder to send the ATQ0 string to the modem, prior to activating any modem function blocks.
Note: When using a SEND function block to send commands to the modem, AT commands must
end with a carriage return character, which has a decimal value of 13.
d. Using the CGM750 with an OCS for both programming and real-time data exchange
If the OCS is connected to a CGM750 for programming, and also needs to periodically exchange real-
time data with another OCS (or other device) using the same port, the OCS ladder program should
perform the following in ladder. (Also, refer to Items b and c for additional informal.)
1. Activate an OPEN function block to open the serial port in the desired mode.
2. Activate a SEND function block to send ATQ0 to the modem.
3. Activate INIT, DIAL and/or ANSWER modem function blocks to establish a connection with
another device for data exchange.
4. Exchange data via SEND, RECV and/or MODBUS function blocks.
5. De-activate the DIAL or ANSWER modem function block to hang up the phone.
6. Activate a SEND function block to send ATQ1S0=1 to the modem.
7. Activate a CLOSE function block to close the serial port.
8. The serial port and modem are again ready to receive calls from Cscape.

MAN0700-03 18 AUG 2003 PAGE 7
5SAFETY
All applicable codes and standards need to be followed in the installation of this product.
6TECHNICAL ASSISTANCE
For assistance, contact Technical Support at the following locations:
North America:
[phone]
www.heapg.com
Europe:
(+) 353-21-4321-266
www.horner-apg.com

PAGE 818 AUG 2003 MAN0700-03
NOTES