Philips SM30 manual Call Station Input Module CSM, Installation Mounting in the Control Centre

7 CALL STATION INPUT MODULE

(CSM) LBB 1283

Each Call Station Input Module allows two SM30 Call Stations to be connected to the Control Centre. SM30 will accept up to 3 Call Station Input Modules and/or Microphone Input Modules in total.

7.1 Installation

Mounting in the Control Centre

The Call Station Input Modules must be located in the Control Centre slots E, D, and/or C, as indicated in fig. 5.1.

The number designated to a Call Station by the microprocessor is dependent on the slot in which the module is located.

If, for instance, only one Call Station Input Module is used in a system, and that module is located in slot E, then the two Call Stations plugged into the module would be numbered 1 and 2.

If the same module were plugged into slot D, then the Call Stations would be numbered 3 and 4.

If plugged into slot C, the Call Stations would be numbered 5 and 6.

This regardless of the fact that they are the only Call Stations in the system.

Connection of Call Stations

The design of SM30 allows a single cable, up to 1000 metres long, to be used to connect a Call Station to one of the Input Module’s sockets. This cable has two screened wires, plus two twisted wires. The screened wires carry the audio signal and Call Station phantom powering, and the twisted wires carry the control signal. Terminate the cable at the side of the Call Station with a lockable 5-pole 180° female DIN socket, and at the side of the Input Module with a lockable 5-pole 180° male

DIN plug.

The DIN connections, viewed from the solder side of the cable plugs, are illustrated in fig.7.

7.2Adjustments

Volume Level Controls

The 2 front panel controls are input volume level controls, used for “lining up” the volume level of the Call Station microphone with the rest of the SM30 signal sources (microphones, attention signals, background music players, etc.).

Since the strength of each person’s voice differs, set each volume level “by ear” so that a clear, comfortable listening level, which is in balance with the other amplified signals, is attained.

REMARK: Reducing the gain by means of the module volume level controls means that it is no longer possible to get the full volume level output from the connected SQ45 amplifiers.

1
1
	2
2	3
1
4	5
	2
	}	LED Data
2		Key Data
LBB 1283

Fig. 7 - CSM

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