ADCP-50-304 • Issue 19 • June 1999 • Section 2: Functional Description
| | ALARM | | | | |
| | JUMPER | | | | |
| TD | | | | PIN 2 | |
| RD | | | | PIN 3 | |
| DCD | | | | PIN 8 | |
STATUS | SQ | | | | PIN 21 | LOWER |
| | | INTERFACE |
INDICATORS | RTS | | | | PIN 4 |
| | | RS-232C |
| CTS | | | | PIN 5 |
| | | | LEADS |
| DSR | | | | PIN 6 | |
ALARM | DTR | | | | PIN 20 | |
| | | | PIN 7 | |
INDICATOR | ALM | | | | |
| | | | |
| | | | | |
TOUCH | RST | ALARM | | | | |
SWITCH | | | | |
| CIRCUIT | | | | |
| | | | | |
| | CONTROL | ALARM | CONTROL |
| OFF | LOGIC | | | MODULE | |
TOGGLE | | | | | |
ALM | | | | | |
SWITCH | | | | | |
LED | | | +5 Vcd | | |
| | | BACKPLANE |
| | | AUTOMATIC | GND |
ROTARY | | | | |
DLY | | ALARM | | | |
SWITCH | | RESET | | | |
| | | | |
| | STORE | | | | |
| | | | 1615-A | | |
Figure 2-10. LED/Alarm Patch Interface Detailed Circuit Diagram
8 TEST MODULE (PSM-12)
Test Module PSM-12 provides the user with RS-232/V.24 interface capabilities, status indicators for eight (8) leads and alarm conditions. A simplified block diagram illustrating the test module connections is shown in Figure 2-11. Two female RS-232/V.24 TEST ports, located on the rear of the test module, are available for connecting the test equipment. Another female RS-232/V.24 port and a patch jack are located on the module front panel. All four connectors are hardwired in parallel.
The eight RS-232/V.24 circuit leads having LED indicators are: TD; RD; DCD; SQ; RTS; CTS; DSR; and DTR. When a monitored circuit lead is active (signal present), the associated LED indicator turns on (only while the signal is present). The colors and signal definitions for the applicable LED status indicators are detailed in Table 2-4.
An adjustable alarm circuit with associated LED (ALM), is provided to inform the user when a preselected alarm condition exists on one of the monitored leads. Each monitored lead has a jumper connection to the alarm circuit control logic. The alarm is user selectable for any one of the eight leads. The RS-232/V.24 interface signal leads are defined in Table 2-3. The alarm circuit control logic supplies the alarm signal to the control unit and an alarm indicator.
Note: Except for the A/B switching circuits, the circuit diagram shown in Figure 2-6is applicable to PSM-12.
Page 2-15
© 1999, ADC Telecommunications, Inc.
