ProTalk Plus B1290, Installation & Operation Manual

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GETTING STARTED PAGE 5
ProTalk Plus
Figure 3 ProTalk Plus Wiring Diagram
Power Requirements
The B1290 will operate from a supply of +11.5 VDC to +28 VDC (Version 1) or +10 VDC to +30VDC (Version 2).
The typical current requirement is 100 mA plus 10 mA per relay. Each expander uses an additional 60 mA plus 10
mA per active relay.
Connect power only to one of the two available inputs: the DC inputs on the Radio terminal block or the plug used
with an AC adapter.
The power supply used should be a safety approved Class 2 power supply source, current
limited using a 2A in line slow blow fuse.
Installation
The B1290 should be installed in a clean, dry place suitable for electronic equipment. The unit will operate from
-40
o
C to +60
o
C.
Caution: Power and the telephone line should not be connected until the rest of the installation is complete.
Use a flat blade screwdriver to make connections to the screw terminals on the sides of the enclosure.
Alarms
In its default condition, the B1290 looks for a normally open (NO) contact which closes to ground to indicate an
alarm. The B1290 may also be programmed to accept inputs normally closed (NC) to ground which open on an
alarm condition. To change this parameter, refer to the alarm format in I/O Configuration - Program Code 5.
Ensure that all unused alarm points are either disabled or connected to ground when using NC contacts. Refer to
Figure 4 for details on how to connect an alarm signal line.
All of the alarm inputs are optically isolated and are operated from the B1290’s internal 12 volt supply.
Connect the alarm inputs to the positions labeled 1 through 8 on the ALARM terminal block.
Caution: DO NOT connect a voltage source to the alarm inputs.