Serial Interface Manual
TLS4/TLS-450 Monitoring Systems
Part No. 577013-950, Revision L
1
1.0 INTRODUCTION
The serial RS-232 interface is used to connect the system to a controlling computer, a display
terminal (CRT) or a printing terminal. A modem can be connected directly to the system to provide
telephone line access.
NOTE: The software versions for these systems vary depending on when they were purchased
and if software upgrades have been installed. The version in which each function code first
appeared is indicated in a box next to its description in Section 7.
2.0 HARDWARE CONNECTIONS
The RS-232 interface is a module accessed via a 9-pin D-connector located on the bottom-left of
the console. Table 2.0 describes all allowable serial ports.
Table 2.0 – Console Slots and their Supported Comm Device Types
Comm Device
Type
Communicatio
n
Type
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
P1 P2 P1 P2
P1 P2 P1 P2 P1 P2
RS-232
Serial
X
X
X
X
X
X
RS-485
Serial
X
X
X
X
X
X
Internal Modem
Serial
X
X
X
X
X
Notes:
−
P1 is port 1, P2 is port 2.
−
Slot 1 (Ports 1 and 2), Slot 2 (Ports 1 and 2), and Slot 3 (Port 2) support Comm Device Types that need
Full Handshaking for serial communications.
−
Slot 3 Port 1 is not available.
−
Slot 4 Port 1 does not support Comm Device Types that need Full Handshaking for serial communications.
Slot 4 Port 2 is only available for Ethernet devices.
2.1 RS-232
The RS-232 D-connector is a panel mount, 9-pin female type, wired in a Data Terminal Equipment
(DTE) configuration. A modem (DCE) may be connected directly to the interface using a straight-
through cable. A CRT or printing terminal (DTE) may be connected to the interface by using a null
cable which reverses the sense of the transmit/receive signals. The system does not require or
activate any handshake signals.
