Installation manual

D9124 Operation & Installation Manual

Page 26

74-06799-000-D 2/96

Connecting Data Loops to Terminals on the Motherboard

D8125 POPEX modules must have their own data expansion loops:

The

motherboard provides two sets of D8125 POPEX Data Loops. POPIT modules assigned

to D8125 POPEX #1 cannot be placed on the D8125 POPEX #2 Data Loop. Limit the

Data Loops coming back to the motherboard to a maximum of four data loop runs for

each POPEX you install.

D8125 POPEX #1 D8125 POPEX #2

DATA LOOPS 1 TO 4 DATA LOOPS 5 TO 8

POINTS 9 - 71 POINTS 73 - 135

Wiring the POPIT Sensor Loop

POPIT modules monitor their sensor loops for three conditions, loop normal, loop open,

and loop shorted. They report these three conditions to the D9124 System.

The D9124 System uses point programming to interpret the sensor loop information

reported by the POPITs and make the appropriate system response.

Terminate all POPIT sensor loops with a 33kΩ end-of-line resistor, Radionics Model

D106F, supplied with each POPIT module.

Table 7: Data Loops and POPITS

POPIT POPITPOPIT

MOTHERBOARD

D8125 POPEX

DATA LOOP

Figure 16B: Connecting Heat Detectors and Other Mechanical Devices

Figure 16A: Connecting Four-Wire Smoke Detectors

SWITCHED + 24VDC

COMMON

POPIT

D294

EOL

SUPERVISION

RELAY

POPIT POPIT

POPIT

MOTHERBOARD

D8125 POPEX

DATA LOOP