7-2
7.1 Settings at Installation
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7.1.2 GYRO I/F Setting
The GYRO I/F circuit of the system is designed to be compatible with most types of gyro compasses by simply
setting the switches.
Step motor type: 24 to 100 VDC
Synchro-motor type: Primary excitation voltage 50 to 115 VAC
Before power-on operation can be performed, the switches S1, S2, S5, S6, S7, and jumper TB105 on the gyro
interface circuit (PC4201) must be set in accordance with the type of your gyro compass by performing the
procedure below.
The switches are factory-set for a gyration ratio of 180X and the step motor type. Make sure of the type of the
gyro compass installed on the own ship before starting the procedure below.
Procedures 1. Set S5 to "OFF."
The gyro compass and GYRO I/F are turned off.
2. Set S6 and S7 in accordance with the type of your gyro compass.
There are two types of gyro compasses: one type outputs a step signal, and the other type
outputs a synchro signal. Make sure of the type of the gyro compass installed on the own
ship before setting the switches S6 and S7.
Synchro signal: Set the switches to [SYNC].
Step signal: Set the switches to [STEP].
3. Set the DIP switch S1 in accordance with the type of the compass.
The items to be set are listed below. For the settings, refer to Table 7-1.
S1-1: Type of gyro signal (step/synchro)
S1-2/3: Gyration ratio of gyro compass
S1-4: Gyration direction of gyro compass
S1-5: Type of log signal (pulse/synchro)
S1-7/8: Ratio of log signal
4. Set the DIP switch S2.
The items to be set are listed below. For the setting, refer to Table 7-2.
１ ２ ３ ４ ５ ６ ７ ８
ON[m1] OFF OFF OFF ON OFF ON OFF
5. Confirm the settings of the DIP switch S10.
The DIP switch must be set as shown below. Do not change any of the settings.
１ ２ ３ ４ ５ ６ ７ ８
OFF OFF OFF OFF OFF OFF OFF OFF
6. Set the jumper TB105.
The TB105 is set for using a low-voltage step signal.
1-2 connected: Setting for normal use
2-3 connected: Setting for a step signal of 22 V or less
7. Connect the gyro signal and log signal cables to the terminal block.
8. Set S5 to "ON."
The gyro compass and GYRO I/F are connected.
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