Version 7.11
74 | Hardware Connections for the Control Panel
Digiplex EVO • Programming Guide
NOTE: The total number of milliamps (mA) can never surpass 700 mA.
Connecting the Combus in Noisy Environments
When installing the combus wires in proximity to high electrical interference, such as neon lights, motors, high-voltage wiring, and transformers, or if connecting
the combus across separate buildings, you must use shielded cables. Connect the shielded cable as follows:
• Within the same building: strip the outer jacket at one end of the shielded cable to expose the shield. Connect the shield to the control panel ground (not the
dialer ground), while leaving the shield at the other end of the cable open (floating).
• Across separate buildings: strip the outer jacket at one end of the shielded cable to expose the shield. In the same building that houses the control panel,
connect the exposed shield to a cold water pipe or any other earth ground available, while leaving the shield at the other end of the cable open (floating). The
same configuration applies to any subsequent building.
Built-in RTC
Digiplex EVO panels incorporate an RTC directly on the PC board. The RTC will save the control panel’s internal clock when both the AC and battery power have been
lost. After power is lost and then restored, the control panel will verify with the RTC and retrieve the time. The control panel will then verify and compare its time
with the time stored in the RTC, every hour. If the times differ, the control panel will reset its internal clock to the time saved in the RTC. The RTC uses a 3V lithium
battery (CR2032) with a battery life of 11 years. Install the battery as shown in Figure 10 on page 74 .
Figure 10: Changing the RTC’s Lithium Battery.
WARNING: When replacing the RTC’s battery, beware of the following, possible hazard:
• If the lithium battery is installed incorrectly, there is the chance that it may explode. Replace only with the same or an equivalent type, recom-
mended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.
Table 76: Milliamp Reference Table for Different Wire Gauges
Wire
Gauge
Length
(of each run of wire)
Available
Milliamps (mA)
Wire
Gauge
Length
(of each run of wire)
Available
Milliamps (mA)
Wire
Gauge
Length
(of each run of wire)
Available
Milliamps (mA)
18 AWG
(Surface: 0.823 sq. mm)
30 m (100 ft.) 700
22 AWG
(Surface: 0.326 sq. mm)
30 m (100 ft.) 700
24 AWG
(Surface: 0.205 sq. mm)
30m (100 ft.) 700
61 m (200 ft.) 700 61 m (200 ft.) 682 61m (200 ft.) 429
91 m (300 ft.) 700 91 m (300 ft.) 454 91m (300 ft.) 286
122 m (400 ft.) 700 122 m (400 ft.) 341 122m (400 ft.) 214
152 m (500 ft.) 690 152 m (500 ft.) 273 152m (500 ft.) 171
183 m (600 ft.) 575 183 m (600 ft.) 227 183m (600 ft.) 143
213 m (700 ft.) 493 213 m (700 ft.) 195
244 m (800 ft.) 431 244 m (800 ft.) 170
274 m (900 ft.) 383 274 m (900 ft.) 151
305 m (1000 ft.) 345 305 m (1000 ft.) 136
457 m (1500 ft.) 230
610 m (2000 ft.) 172
762 m (2500 ft.) 138
914 m (3000 ft.) 115
To Next Page
Loading...
Need help?
General
