Instruction manual

JUPITER CM-4400 Control Module Installation and Operating Manual 45

CM-4400 Control System’s Protection Features

The CM-4400 has many features that are for your protection. These features

include:

•Alarms

•

Single CM-4400

•Redundant CM-4400

•Redundant Units

Alarm Modes

The CM-4400’s alarm system will start in the following conditions:

• The main CPU (or a main CPU task) is not operating pr

operly.

• The power supply is not operating properly.

• The unit is in the process of rebooting.

The master alarm condition is indicated by e

ither a “00,” “01,” or “FF” on

the front panel’s LED display, and at the rear panel’s Alarm BNC connector

(Figure 3 on page 33). For more information alarm conditions, see Error

Codes on page 260.

The Control Module Alarm Circuit

Electrically, the Alarm BNC operates according to the SMPTE standard

269M-1999. When an alarm is asserted, the circuit associated with the

Alarm connector will present low impedance to an external current source

circuit provided by the customer. Figure9 shows the CM-4400 alarm circuit

(left) and an example of a customer-supplied indicator

circuit (right).

Figure 9. CM-4400 Alarm Circuit

EXTERNAL CIRCUIT

(EXAMPLE)

NOT TO EXCEED

24 VDC @ 20 mA

REAR−PANEL BNC

8 6 05_r1 CM alarm circuit