Installation Instructions

R20 1X UBS Macro B T S Hardw are Installation T asks 10 -13: Connecting RGPS , Spans, Customer Alarms
Input connections
Each input consists of a wire/pin pair (that is, input/Gnd). T o ensure proper operation, each
pair to be used must be connected to an external sensor that provides a dry -contact closure.
The customer sensor output connects between an optically isolated 5 V DC signal and an
isolated return.
F or an OPEN circuit (logic 0 ) between pins:
• There is 10 K Ohms or greater across the input pair .
• The signal to ground voltage is +5 V DC .
F or a CLOSED circuit (logic 1 ) between pins:
• There is 1 K Ohms or less across the input pair .
• The signal to ground current is a maximum of 9 mA.
Either of the above states can be defined by the customer in system software as an alarm
condition.
Output connections
Each output consists of 3 -wires/pins:
• COM
• NC
• NO
The customer output device control inputs connect between the common (COM) and either the
normally closed (NC) or normally open (NO) contacts of a relay . The NC and NO state for relay
contacts occurs when the relay coil is not energized.
Relay contacts are load rated for a maximum of 1 A at 24 V DC and 0.5 A at 50 V DC .
The toggling of relay contacts to the opposite state is controlled by system software.
Pins and signals
Figure 2 -21 , T able 2 -12 and T able 2 -13 show the pin and signal information for cable X.
68P09283A62 -2 2 -53
PRELIMINARY A UG 2007