Bosch EVX-ZA Installation Manual
EVX-ZA
Class “A” Converter
The EVX-ZA converts 4 Class “B” 2-wire circuits to 4 Class “A” 4 wire circuits. 24VDC power is supplied at TB-7. Speaker
or strobe power is applied at TB1 and TB2, and connections for field wiring are provided at TB3, TB4, TB5, and TB6. All
wiring is power-limited. Mounts to snaptrack or 5/8” nylon standoffs.
Compatible with 25VRMS or 70VRMS speaker lines. Maximum speaker output 50 watts per circuit. Maximum strobe output
1 amp per circuit.
Fig.1
Board
TB1:
Ter . 1 Class “B” Speaker Input Zone 1, +
Ter . 2 Class “B” Speaker Input Zone 1, -
Ter . 3 Class “B” Speaker Input Zone 2, +
Ter . 4 Class “B” Speaker Input Zone 2, -
TB2:
Ter . 1 Class “B” Speaker Input Zone 3, +
Ter . 2 Class “B” Speaker Input Zone 3, -
Ter . 3 Class “B” Speaker Input Zone 4, +
Ter . 4 Class “B” Speaker Input Zone 4, -
TB3
TB7
TB4
TB1
TB5
TB2
TB6
TB8
TB7:
Ter . 1 +24VDC in, +
Ter. 2 +24 VDC in, -
TB8:
Ter . 1 +24VDC in, +
Ter. 2 +24 VDC in, -
SPECIFICATIONS:
Power: +24VDC in
Current Draw: 38mA Standby
48mA Active
TB3:
Ter . 1 Class “A” Speaker Output Zone 1, +
Ter . 2 Class “A” Speaker Output Zone 1, -
Ter . 3 Class “A” Speaker Output Zone 1, + Return
Ter . 4 Class “A” Speaker Output Zone 1, - Return
TB4:
Ter . 1 Class “A” Speaker Output Zone 2, +
Ter . 2 Class “A” Speaker Output Zone 2, -
Ter . 3 Class “A” Speaker Output Zone 2, + Return
Ter . 4 Class “A” Speaker Output Zone 2, - Return
TB5:
Ter . 1 Class “A” Speaker Output Zone 3, +
Ter . 2 Class “A” Speaker Output Zone 3, -
Ter . 3 Class “A” Speaker Output Zone 3, + Return
Ter . 4 Class “A” Speaker Output Zone 3, - Return
TB6:
Ter . 1 Class “A” Speaker Output Zone 4, +
Ter . 2 Class “A” Speaker Output Zone 4, -
Ter . 3 Class “A” Speaker Output Zone 4, + Return
Ter . 4 Class “A” Speaker Output Zone 4, - Return
*Standoff mounting must utilize 5/8” nylon standoff
P/N 1-5060 REV. B
Fig.2
Typical connection detail
Zone 1
Output
FF
II
RR
EE
FF
II
RR
EE
+ +
- -
+ +
TB3
Zone 2
Output
- -
10K
EOLR
TB4
Zone 3
Output
TB5
Zone 4
Output
FF
II
RR
EE
EVX-ZA
TB7
TB1
TB2
TB6
TB8
FF
II
RR
EE
10K
EOLR
+ -
+24VDC
In
+ - + - + - + -
TB2
JP1
TB1
S2
EVX-4Z
S3
S4
J1
-
+24VDC out to
additional
+
EVX-ZA units
TB3
1 2 3 4 5 6 7
S5
33 Chestnut St. New Haven, CT 06511
(203) 752-1806 FAX 752-1906
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