B-2 Appendices
TP-5672 11/95
TB-DC1
Terminal
No.
Input/
Output*
TB-DC1
Terminal Name
TB-DC1
Terminal Description
18
OUTPUT
Emergency Source
If the emergency source is available, terminal 18 is grounded.
19
OUTPUT
System Alert
If there is a system-status system alert, terminal 19 is
grounded.
20
INPUT
Automatic/Manual
If terminal 20 is grounded, the logic board is in the manual
mode. The transfer switch is then under the control of the
manual transfer pushbuttons.
21
OUTPUT
Engine Start Terminal 3
Connects to generator set engine start terminal 3.
22
OUTPUT
Remote Start/Stop Relay
Terminal 22 is connected to K2, normally closed contact.
23
OUTPUT
Unregulated DC Power
Terminal 23 is an output voltage source to the optional dry
contact kit, DD-14.
24
INPUT
K1 Test Relay Control
Grounding terminal 24 energizes the test relay which simulates
a normal source failure.
25
INPUT
Normal Relay/
Emergency Relay/
Off-to-Normal Relay
Off-to-Emergency Relay
Terminal 25 supplies 10 volts DC to the transfer control relays.
The power is supplied from terminal 30.
26
OUTPUT
Normal Source
If the normal source is available, terminal 26 is grounded.
27
OUTPUT
Emergency-Position
Relay
If the contactor is in the emergency position, terminal 27 is
grounded.
28
OUTPUT
Normal-Position Relay
If the contactor is in the normal position, terminal 28 is
grounded.
29
INPUT
Battery
Input for external 12 to 30 volt DC controller power supply.
30
OUTPUT
Regulated DC Power
Supply
Regulated 10 volts DC from the controller power supply.
31
OUTPUT
Engine Start Terminal 4
Connected to P1-15.
32
N/A
Ground
Ground
33
N/A
Ground
Ground
34
N/A
Ground
Ground
*
Use Dry Contact Kit for external annunciation to custom equipment.
Figure B-1. Power supply board TB-DC1 terminal numbers, names,
and descriptions— continued