SILENT KNIGHT SK-5208 Specifications download pdf (Page 20)

Control Panel Installation 151204

3-10

3.10 Telephone Line Connection

The SK-5208 connects to two separate telephone lines to report data to the central station. An RJ31X jack should

be installed by the telephone company for each line. Figure 3-4 shows how to wire the telephone line

interconnect cords (not provided) to the SK-5208.

Note: To reduce the possibility of false alarms and transient damage, DO NOT bundle telephone wires together

with initiation or notification device wires.

Figure 3-4 Telephone Line Connection

The letter designator on the phone input indicates whether it is the Telco or House side of the phone circuit. For

example terminals 60 and 61 are labeled T1, T = Telco side of the phone circuit and terminals 58 and 59 are

labeled P1, P = Premise (House) side of the phone circuit.

The SK-5208 has built-in dual phone line monitors. These circuits will detect any fault in the phone lines by

monitoring the DC voltage present on the lines. If phone line voltage drops below 3 VDC and is not corrected

within approximately 60 seconds, an audible trouble signal will sound and the panel will report a line fault

trouble over the remaining phone line.

A situation could occur where both phone lines appear to be good, but the dialer cannot get through to the central

station on the first line. In this case, the SK-5208 will switch phone lines and attempt the call again using the

second line. Make sure the phone lines are programmed properly (see Section 4).

Note: To comply with industry standards, this product is equipped with line seizure. Any time the system’s dialer

needs to communicate with the central station, it will not be possible to use any telephones that are on the

same line(s) as the system. Normally, this condition will last approximately one minute, but under adverse

telephone circuit conditions, could last for as long as 15 minutes.

3.11 Detector Installation

3.11.1 Class A (Style D) Zones

Zones 1 and 2 may be selected through programming as Class A (Style D) zones (see Section 4.2.2 for zone style

programming). See Section 3.11.2 for Class B (Style B) configuration.

Each class A zone is a four-wire circuit that allows an alarm to be detected even after a single open or ground

fault occurs. When a single open or ground fault occurs, the audible trouble signal will sound and the SK-5208

will report the trouble to the central station or remote station (if programmed to report troubles). If reporting to a

remote station troubles may be transmitted to a secondary location.

Figure 3-5 shows how to wire a Class A (Style D) circuit. No end-of-line (EOL) resistors are needed for these

Supervised

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SILENT KNIGHT SK-5208 Specifications Page 20