DWEX DIGITAL LOUD-SPEAKING EXPLOSION PROOF CALL STATION
User Manual
page 36/40
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APPENDIX B (REFERENCE)
CONNECTION DWEX
DWEx is connected via the terminal block (2, Figure 3). For DWEx versions with a 25 W
amplifier (see Table 1), the amplifier must be connected to an external 48 V DC power source
via pins 3 and 4 of the terminal block. The purpose of the terminal block contacts is given in
Table B.1.
Table B.1 – The assignment of the terminal block of DWEx (beginning)
Pin No
Circuit
Identification
1
25W
_ О
UT_1
Output of line for auxiliary amplifier 25 W
2
25W
_ О
UT_2
3
+POW_25W Input of power supply for auxiliary amplifier 25 W circuit 0 V
4
–POW_25W Input of power supply for auxiliary amplifier 25 W circuit -48 V
5
+U
а
Interface Uk
0
, digital communication line with the central exchange,
can also be used for PoU “phantom” power supply circuit
6
–U
в
7
+U_FANTOM 48 V of PoU “phantom” power supply circuit
8
–U_FANTOM Output -48 V of PoU “phantom” power supply circuit
9
+U_POWER Power supply input for the main board, circuit 0 V
10
–U_POWER Power supply input for the main board, circuit -48 V
11
О
R1
Relay executive contacts
12
О
R2
