Specifications

Excalibur Multirate DAP Installation and Operation
3-14
To make this connection to the DTE connector, you must order Cable Part No. 5956-37C
from Milgo. This cable has one RS-232 25-pin connector at one end that plugs into the
DAP's RS-232 DTE connector and two (one for the primary channel, the other for the
secondary channel) RS-232 25-pin connectors at the other end. This cable provides
secondary channel CTS. The pin/signal assignments for this connector are identical to
those listed in Table 3-1.
Table 3-8. Clear Secondary Channel (NMI) Connector, Pin/Signal Assignments
Pin
No. Signal
Input/
Output Function
1 Not Used – –
2 Signal Ground – Common ground.
3 Secondary Channel
Receive Data
Output Serial data to the DTE.
4 Secondary Channel Data
Carrier Detect
Output Indicates that secondary
channel signals are being
received.
5 Not Used – –
6 Not Used – –
7 Secondary Channel
Request-to-Send
Input Indicates the DTE is ready to
transmit data.
8 Secondary Channel
Transmit Data
Input Serial data from the DTE.
9 Signal Ground – Common ground.
10 Not Used – –
Connecting to an External Alarm
The Excalibur Multirate DAP provides a 10-pin jack labeled EXT ALM for connecting
to an external alarm device (such as a burglar alarm or smoke detector). This enables an
alarm device at a remote site to transmit an alarm through the secondary channel back to
the central site.