Carrier Access Access Bank II SNMP, Installation And User Manual

Page: 60 / 180

Connecting the Power and Ground
9/24/01 5-13
Table 5-8: CAC Straight Adapter Pin Assignments
5.8 Connecting the Power and Ground
5.8.1 DC Power Connector Input
Warning:
Connect only -48 Vdc power to the DC input connector.
The Access Bank II SNMP has a 3-position DC Power Connector Input located on the Control Panel,
as shown in Figure 5-1. To conform with UL 1459 and National Electrical Code safety requirements,
the Access Bank II SNMP is equipped with solid-state, automatic-resetting, current-limiting devices
to protect the -48V Input and +DC Return power inputs on this connector from AC power surges,
lightning, or inductive motor spikes. This means there are no internal fuses for you to replace
.
Pinout assignments for this connector are defined in Table 5-9.
Table 5-9: Power Connector Pinout Assignments
Designation DCE DB9 female DCE DB25 male Pair Signals
(Not required)
Shield + (Shield) 1+ (Shield)
Ground 5 7
Secondary TXD 3 2
Secondary RXD 2 3 °
Secondary RTS 7 4
6 6 °
Secondary DTR 4 20
8 5 °
Secondary CD 1 8 °
9 22
Pin Number Signal
1 AB115 Power Converter Cube, or -42 to -58 Vdc
power source
2 DC return, to power terminal
3 Telco or safety (green-wire) ground
!