Table of Contents
Advertisement
External SW2 DIP Switch Functions
The external DIP switches (located on the front panel) are
used for diagnostic testing. When SW2_1, SW2_2 or
SW2_3 are in the Down position, the "ALARM" LED will
blink, indicating an abnormal condition. During normal
operation, all switches should be kept in the Up position.
SW2_1 (RMTLB): When this switch is in the Down position, the composite optical signal is received and
decoded, then looped back to the transmitter for diagnostic testing.
SW2_2 (LOCLB): When this switch is in the Down position, the electrical signal received (on pins 2 & 4
for an RS-232 interface) is looped back internally (to pins 3 & 5 for an RS-232 interface) for diagnostic
testing.
SW2_3 (SIG GEN): The TC2200/2201 has a built-in signal generator. By sliding this switch to the Down
position, a slow-rate pulse signal of logic "highs" and "lows" will be sent through the fiber to all units in the
bus, simulating a broadcast or response message. The "BRD" LEDs on the Master and "RSP" LEDs on the
Slaves will flash, indicating transmission & receipt of the other's signal.
SW2_4 (DIS ALARM): When this switch is in the Down position, the audio alarm buzzer and dry contact
alarm relay switch are disabled.
Pin Assignments and Connection
The DB25 connector on the rear panel of the TC2200/2201 provides for the connection of the user's RS-
232, RS-422 or RS-485 devices. The pin assignments for each type of interface are illustrated in the diagrams
that follow.
For units with an RS-232 interface, two separate channels are provided for handshaking signals or the
connection of an additional device (this additional channel is not present on Multi-Master units). Pins 2 &
4 are inputs while pins 3 & 5 are outputs.
Figure 10. RS-232 Pin Assignments & Connection Diagram
RMTLB (Remote Loopback)
LOCLB (Local Loopback)
- 8 -
TC2200R/S Bus
User's Manual
Rev. 2.2
1 2 3 4
1
2
3
4
ON
DIS ALAR M (Disable Alarm)
SIG General (Signal Generator)
Advertisement
Table of Contents
