Service manual

20
Functional Description
DCB, DCFCB and DCFCTB Models
JP20
Short to Test Relay Output #4
1
Short to pin 2, to engage Relay output #4.
JP21
Relay Outputs, 3 Amps, up to 240 VAC, (#1 at left edge of
connector)
1
Relay 1, Common
2
Relay 1, N.O.
3
Relay 2, Common
4
Relay 2, N.O.
5
Relay 3, Common
6
Relay 3, N.O. or N.C., depending on jumper JU1
7
Relay 4, Common
8
Relay 4, N.O. or N.C., depending on jumper JU2
JP22
AC Power Input
1 and 2
120 or 240 VAC +/- 10%, 60 Hz
P1
Transceiver Interface
1
Transmit audio, DC isolated, 0 to 1 Vp-p
2
Receive audio, DC isolated, 350 mVp-p to 3 Vp-p
3
PTT not, goes low (<0.65 V) during transmit
4
Ground
5
+12 Volts DC, 100 mA max, 2 A with battery.
6
Carrier Detect not, set low (<0.65 V) during receive
7
No connection
8
Ground
9
Ground
TJ1
Test Jack
1
Ground
2
Reference (+4 V)
3
Receive Audio
4
VCC (+5 V)
5
+8 V
6
+12 V
7
+17 V
8
TJ2
Test Jack
1
Isolated +12 V
2
Isolated +5 V
3
Isolated Ground