D7212GV3 | Operation and Installation Guide | 9.0 Off-Board Points
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Bosch Security Systems, Inc. | 10/10 | F01U143079-03 35
9.3 Installing the D8125 POPEX Module
For information on the Multiplex Bus
Interface, refer to the D8125 Multiplex Bus
Interface Operation and Installation Guide
(P/N: F01U034973).
Save the POPIT Label Sheets: The D8125 is
packaged with two sets of POPIT label sheets. One
set is marked “Bank 1” for use with the D7412GV3
and D7212GV3. The other set is marked “Bank 2” for
use with the D9412GV3 and D9112. Use the Bank 1
sheet later to label the POPITs. Refer to Section 9.3.6
POPIT Module Point Assignments on page 36.
9.3.1 Mounting
To install the D8125 in the enclosure with the control
panel:
1. Align the D8125 POPEX Module with any of the
four mounting locations in the enclosure (refer to
Figure 2 on page 14).
2. Using the screws provided with the module,
secure it in the enclosure.
9.3.2 Wiring the D8125 to the Control Panel
To wire one or two D8125 Modules to the control
panel (Figure 13 on page 34):
Power Down the Control Panel
Disconnect the positive (red) battery lead at the
battery and unplug the transformer.
For Points 9 to 40:
1. Connect the GND terminal of the D8125 to
Terminal 23 on the D7212GV3.
2. Connect the OUT terminal of the D8125 POPEX
Module to ZONEX IN 1, Terminal 27.
3. Connect the IN terminal of the D8125 POPEX
Module to ZONEX OUT 1, Terminal 28.
4. Connect the AUX terminal of the D8125 to
Terminal 24 on the D7212GV3.
Refer to Section 9.3.4 Wiring Data Expansion Loops
to POPEX Modules on page 36 for instructions on
connecting POPITs to the D8125 POPEX Module.
9.3.3 Wiring POPITs to the Data Expansion Loop
Use one two-wire data expansion loop or distribute
the POPITs on up to three loops. Setting DIP
switches on the POPIT Modules assigns them to point
numbers. Refer to Section 9.3.6 POPIT Module Point
Assignments on page 36.
Review Section 4.6.2 Installing and Wiring Detection
Devices on page 16 to determine if shielded wire is
required. Refer to Table 12 to determine the wire
gauge for the length of each data expansion loop.
Table 12: Data Expansion Loop Wire
Specifications
Maximum Length of All Data Expansion Loops
Combined
AWG Length in Meters (Feet)
22 548 (1800)
20 881 (2890)
18 1402 (4600)
16 2231 (7320)
14 3551 (11,650)
Combine Data Expansion Loops
The maximum lengths shown in Table 12 are for all
data expansion loops connected to the same POPEX
Module combined.
Wiring POPITs Together
Do not connect POPITs to each other in
series or with a T-tap. Doing so might
cause random missing POPIT conditions.
Before installing the POPITs, ensure that the
resistance on the data expansion loop is no
more than 40 Ω.
To connect POPITs to each other in parallel:
1. Connect the positive (+) data terminal from one
POPIT to the positive (+) data terminal on the
next POPIT.
2. Connect the negative (-) data terminal from one
POPIT to the negative (-) data terminal on the
next POPIT.
3. Repeat Steps 1 and 2 to connect all POPITs to
the expansion loop. It is not necessary to wire the
POPITs in any particular sequence on the loop.
The switch setting on each POPIT assigns it a
point number, regardless of its physical location.
Three-inch Clearance for Tampered POPITs
Mount tampered POPIT modules at least 7.6 cm
(3 in.) apart to prevent the tamper magnets from
interfering with each other.
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