Communications Specialties FIBERLINK XRD-8050/RK Руководство пользователя - Страница 7

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Signal Connections

The signal connections for the XRD-8050 follow the recommended EIA DCE

format for RS-232. These connections are described below and must be compat-

ible with the equipment being used. All signal connections are made via an

industry standard DB-25S connector.

Description

Chassis Ground

Transmitted Data

Received Data

Request to Send

Clear to Send

Data Set Ready

Signal Ground

Data Carrier Detect

Data Terminal Ready

All other signal pins are not utilized.

Power Supply Connections

12 to 18 volts AC

12 to 18 volts DC

AC or DC Return (Common)

Anti-Streaming Time-Out

The XRD-8050 contains an internal timer which will block the RS-232 input

signal to any unit in the event that a faulty data streaming condition is produced

by any traffic signal controller. This timer is triggered by the rising edge of the

RTS signal. When the pre-set time interval is exceeded, the CTS line will be

forced low and the data input to the XRD-8050 blocked, thereby preventing

system lockup. The unit will then remain in the blocked state until the RESET

button on the front panel on the unit is pressed. Only the XRD-8050 connected

EIA Designation

(AA)

(BA) (input)

(BB) (output)

(CA) (input)

(CB) (output)

(CC) (output)

(AB)

(CF) (output)

(CD) (input)

Position 1 of 3 position terminal block

Position 2 of 3 position terminal block

Position 3 of 3 position terminal block

DB-25S Pin Number

6 (jumped to 20)

20 (jumped to 6)