Specifications

NOTE: The Microprocessor PC Board should not be removed from the main PC board. If it has been

removed, install it by using the Microprocessor PC board alignment marker shown in Figure 3.

Make sure that all pins on the PC board are properly aligned.

1.2.1 Power

The SP4-TZC is powered by a separate 24VDC filtered and regulated power supply which can provide a

minimum of 150mA of current. The Wheelock RPS-2406 is a good choice.

1.2.2 USB Port

The USB port is used to program the 9 Logical Zone Groups and Background Music (BGM) using the

SP4 Telzone Programmer software included. The default (out of the box) configuration for the SP4-TZC

is that all zones have BGM. To program using the USB port, connect an interface cable from the host

computer’s USB ports to the USB Series “B” receptacle located on the SP4-TZC. The USB cable should

not exceed 10 feet in length. This cable can be purchased using Wheelock Part Number TZC-USB

(109923). The SP4 Telzone Programmer software can also be downloaded from the Wheelock, Inc

website (www.wheelockinc.com).

1.2.3 Telephone Input

The PHONE IN (Telephone Input) can accept three different types of devices to activate an audio page: a

stand-alone telephone, an unused C.O. port, or a page port. The SP4-TZC provides the stand-alone

telephone and unused C.O. port with loop start current in order to operate and provide DTMF tones. The

page port must provide 600 Ohm impedance, provide a dry contact, pass loop current, and allow the

DTMF tones to pass.

1.2.4 Background Music Input

The monaural Background Music Input shall be a Line Level Signal of 300mVrms at 600 Ohms.

Background Music will be automatically muted when any other input from the SP40/2 or page input

from this module is in use.

1.2.5 Audio Out

The Audio out connects the SP4-TZC to the SP40/2 BGM input.

1.2.6 RS485 Digital Control Port

The RS-485 Digital Control Port is the digital control for the SP4-APS splitters.

1.3 Enclosure

The SP4-TZC PC board is mounted in its own enclosure and is designed for indoor use only. Normally, it is

mounted next to the SP40/2 enclosure. The separate 24VDC power supply is mounted outside of the

enclosure.