Pub. 42004-605L2B
Model 701-804 SmartSeries
®
Handset Station with Auxiliary Jack
Page: 4 of 16
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Block Diagram
As shown in Figure 3, plug
P1
on the back of the Base-16 PCBA plugs into a socket in an enclosure
connected to the system cable, picking up the Page/Party
®
lines and ac power. Connector
J6
on the Base-
16 PCBA connects ac power to the Bias Power Supply PCBA and re5 V dc and +/-15 V dc in
return. The Base-16 PCBA uses the bias supplies and also passes them (as well as control, monitoring,
and line signals) to the FSK Modem and Handset Amplifier PCBAs via
J1
, a 24-pin stacking connector.
Connector
J2
on the Base-16 PCBA connects the speaker transformer for the station’s speaker, and
J3
connects optional external devices.
The Handset Amplifier PCBA has connections to the handset and the hookswitch via spade terminal
connectors
E1
to
E7
, and it has connections to the front panel auxiliary jack and the Receiver Isolation
PCBA via
J2
.
Interfaces
The assembly interfaces to the system cable, an external loudspeaker, and auxiliary devices via
P1
, a 16-
pin connector. All connections to the system cable are made by qualified installation technicians during
system installation. Direct questions about these connections to GAI-Tronics’ Field Service Department.
Other connectors on the Base-16 PCBA provide quick connect/disconnect of subassemblies. Connector
J3
on the side of the Base-16 PCBA connects to devices such as the relay module in a SmartSeries
®
Station Remote Terminal Unit (RTU) enclosure.
Installation
The assembly plugs directly into any GAI-Tronics 700 Series enclosure such as the Model 703A (indoor),
the Model 7325-101 (cast aluminum outdoor), or the Model 7335-001 (nonmetallic outdoor). It also
plugs into a SmartSeries
®
Station RTU enclosure. When installing the assembly in this enclosure, you
must also connect the 10-conductor keyed ribbon cable to
J3
on the side of the Base-16 PCBA. Be sure
that the red line on the edge of the cable lines up with
J3
-pin 1. Ensure that the connectors mate securely
and then tighten the 4 captive screws on the corners of the front panel.
Figure 3. Block Diagram