Chapter 4 - Hardware Description

Fuse/Circuit Breaker (AC Power)

Currently, MGC-100 Control Units come equipped with a circuit breaker. Previous models on the MGC-100 use one UL approved circuit breaker. The specifications of the fuse are shown in Table 4-3.

The MGC-50 uses one UL approved fuse, Schurter Type no. 0001.1015. The specifications of the fuse is also shown in Table 4-3.

Table 4-3: Fuse specifications

Voltage (V)

Previous MGC-100

MGC-50 Specifications

Control Units without

 

 

circuit breakers

 

Size

5 * 20mm

5 * 20 mm

 

 

 

Type

Quick acting - F

Quick acting - F

 

 

 

Rating

10A, 250V

12.5A, 250V

 

 

 

Fans

Three fans are mounted at the bottom of the rear panel on the MGC-100. Each fan has an alarm, which is monitored by that Main Control Module. The system generates an alert upon failure.

Two fans are mounted at the bottom of the rear panel on the MGC-50.

Alarms Port

In the MGC-100, the main control module includes an Alarms port. The dry contacts on the rear panel of the MGC-100 are for connecting to the customer’s alarms system. The Alarms port has the following specifications:

Voltage rating: 60 V DC maximum

Current rating: 0.2 A maximum

For the MGC-50, no Alarms ports are in use.

4-22

Page 96
Image 96
Polycom MGC-50/MGC-100 installation manual Fans, Alarms Port, Fuse/Circuit Breaker AC Power