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12.0 C
OMMUNICATION
The STS2 monitoring system offers several choices for communications.
The RS-232 terminal port is standard on all units. The port is located inside the front door, to the
left of the touch screen/LED front panel mounting as shown in Figure 29 on page 47. This port is
primarily used as an alternate user interface to configure, control, and diagnose the system, espe-
cially for systems that do not include the HMI touch screen. Commands for the RS-232 port are
shown in Table 10.
Several other communications options are also available. Those options are located a Communica-
tions compartment to the right of the touch screen/LED front panel and are accessible when the
front panel door is open. See Figure 21 on page 39 and Figure 22 on page 40 for the location of
the communications options.
Connections to the communication ports are made by wiring to terminal boards located in the Com-
munications compartment. The communications options listed below reference the control wiring
drawing for each option.
• Internal modem (optional) — the connection to this modem is through a standard RJ-11 port.
This port automatically dials the programmed telephone number when a designated alarm
occurs. Automatic dial attempts are made to the first phone number at periodic intervals for 30
minutes. After that time, auto dial attempts are made to the second phone number at periodic
intervals for the next 30 minutes. The process is repeated until a successful connection is made.
Upon successful connection, the system transmits the status information and then hangs up.
System status and history information can be requested and date and time can be changed
through the modem. The modem commands are shown in Table 10 on page 71. See
Figure 27 on page 45 for more information on the internal modem.
• Network Interface Card (NIC) (optional) — the NIC provides connectivity to any TCP/IP-based
Ethernet network to allow the device to communicate with network management systems
(NMS) via SNMP . Events can be transmitted to the NMS to provide remote status monitoring,
plus fault and alarm detection. The NIC includes an RJ-45 port for an Ethernet connection, via
Category 5 cable.
The NIC can also integrate the system with an existing Building Management System (BMS) or
out-of-band monitoring, using Mobus, a standard multi-drop protocol. The NIC has redundant
communication paths that make it possible to connect to a BMS using Modbus while simulta-
neously communicate to a NMS through SNMP
See Figure 28 on page 46 for more information on the NIC. If you have questions about the
NIC, refer to the OpenComms Network Interface Card Installation and Users Guide.
• Input Contact Isolator (ICI) Board (optional) — provides an interface for up to eight user
inputs. External messages and alarms can be routed to the unit, via the ICI.
See Configuring the Input Contact Isolator Settings on page 90 for instructions on con-
figuring the connections. See Figure 25 on page 43 for wiring details.
• Programmable Relay Board (PRB) (optional) — up to two PRBs can be installed in the STS2 to
route STS2 events to external devices.
See Configuring the Programmable Relay Board Settings on page 91 for default settings
and instructions for reconfiguring the relays. See Figure 24 on page 42 for wiring details.
• Comms Board (optional) — includes a terminal block to provide a DTE connection to an exter-
nal modem. This board also provides a direct connection to a SiteScan terminal, via an RS-422.
SiteLink-12 or SiteLink-4 is required for SiteScan to communicate with the STS2. See
Figure 26 on page 44 for wiring details.
Data link requirements are Full Duplex Asynchronous RS-232 format.
Communications options are also discussed in 6.0 - Options on page 18.
12.1
Using the RS-232 Port
The RS-232 port is configured with a baud rate of 9600 with 8 Data Bits, 1 Stop Bit, No Parity, and
no hardware handshaking.
70
Communication Interfaces
I
NTERFACES
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