Positron Teleline 751109/15, Description And Installation

Page: 38 / 57

38
8-card Shelf CCC model 751109/15
3.5 Power Connections
The power for the shelf may be connected using either an external power supply
or an internal power supply. These two different options are described below.
3.5.1 External Power Supply
When connecting power to the shelf using an external power supply, there are two
methods, as listed below.
³ To power the shelf via the Station cable
The shelf may be powered via the Station cable by an external -24 Vdc or -48 Vdc
supply, or by 130 Vdc using the AUX PWR line. The unused strain relief should be
blocked. For an illustration of this type of external powering, refer to Figure 10 on
page 45.
1. Make the cable connections. For a list of the standard color codes for Station
side cables, refer to Table 4 on page 39.
C
AUTION
Q
External power sources and /or primary sources (120 Vac / 130 Vdc / -
48 Vdc) must be fed through disconnect devices rated at 3A. Both the
line and the return leads must have disconnect devices.
Q
When using an external power supply, make sure the equipment is UL /
CSA certified before connecting it to the shelf. No equipment other than
Positron can be used in a Teleline shelf, otherwise this will compromise
isolation, compromise safety and void the warranty.