Hooking Up A Terminal - Chamberlain SENTEX Infinity Series Installation Instructions Manual

NOTES:
•
Line-powered modems cannot be used with the Infinity.
•
If external modems are connected to the Infinity telephone line, the Infinity must have the
multiple entry option installed so it does not come on line when the modem is active.
1. Use a 3 conductor, 18 to 24 AWG shielded cable (such as Belden Datalene #9925) and a DB25
connector, and ground the cable shield to the Infinity's ground screw. These wires should not
be part of a larger cable containing wires used for any other purposes.
2. You can locate the modem up to 50 feet from the system at, any baud rate that matches the
Infinity baud rate (see Section D, above), and must be set to full duplex and a word protocol of
8 data bits, no parity bits, and 1 stop bit (8-none-1). Consult your modem manual to set this
protocol.
3. Refer to the table below for standard RS-232 modem connections.
PIN NUMBER ON DB25
Place one jumper between pins 4 and 5 and
another between pins 6 and 20.
2 ("transmit data")
7 ("signal ground")
3 ("receive data")
NOTE: RS-232 port connections are determined by reading the equipment instructions.
F. HOOKING UP A TERMINAL
The Infinity works with any standard ASCII terminal that emulates a Televideo 910+ terminal.
Connect the terminal via the RS-232 serial port. You can buy a Wyse 30 terminal from
Sentex Systems. Personal computers with "terminal emulation" software may be used instead of
an actual terminal.
If The Terminal Or Computer Is Under 30 Feet Away:
1. Connect the terminal to the first unit in the chain. Plug the terminal into RS-232 Port 1
(see Figure 3 or Figure 4).
2. Disconnect the RS-232 connection from the short-haul modem to the Main processor board.
See Figure 3 or Figure 4.
3. Remove the power wire from TB5 on the short-haul modem.
4. Remove the other end of the power wire from TB5 on the main processor board.
NOTE: Do not use either of these terminal blocks for any other purpose.
5. Use a 3 conductor, 18 to 24 AWG shielded cable (such as Belden Datalene #9925). These
conductors should not be part of a larger cable that contains wires used for other purposes.
6. Use a DB25 male connector (DB9S if your computer has a 9-pin serial port), and ground the
cable shield at Infinity's ground screw.
7. Your terminal must be running at the same baud rate as the Infinity (see step D, above), and
must be set to full duplex communications and a word protocol of 8 data bits, no parity bits, and
1 stop bit (8-none-1). Consult your terminal's manual to determine how to set this protocol.
The connections for the video terminal or computer are shown below:
Rev C
DB25 Connections.
TERMINAL ON MAIN CIRCUIT BOARD TB 2
Place a jumper between pin 1 (CTS) and 5 (RTS).
Doc 6001565
RS-232 in (IN)
GROUND
RS-232 out (OUT)
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