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16.3. About Pin 7 of the Control/Monitor Terminals
A ground common to all the control and monitor terminals is assigned to Pin 7.
Both Pins 7 of the Control/Monitor terminal for CH1 and CH2, and that for CH 3 and CH4 are internally
connected to each other.
Pins 7 are isolated from the unit body.
16.5. Connection Cable and Maximum Cable Length
For the connection cable, use a Category 5 twisted pair cable for LAN (CAT5-UTP).
The maximum cable length is 600 m (656.17 yd).
16.4. Terminal Pin Arrangement
• About operation and terminal status
• The same information is output from both Pins 8 (fan status output) of the CH1 and CH2 terminal, and the
CH3 and CH4 terminal.
• Lighting status of the protection indicator on the front panel matches operation of protection status provided
at the monitor terminal.
HI-LEVEL LO-LEVEL
Control terminal (input) 9 – 14 V DC 0 – 3 V DC
Monitor terminal (output) OFF ON
Protection indicator (front panel) Light off Light on
Protection status (output) OFF ON
Terminal Pin No. Pin name
Unit operation status
HI-LEVEL LO-LEVEL
CH1, 2 CH1 power ON/OFF control (input) CH1 power OFF CH1 power ON
CH1 protection status (output) CH1 normal CH1 protection activated (irregular)
CH1 power ON/OFF status (output) CH1 power OFF CH1 power ON
CH2 power ON/OFF control (input) CH2 power OFF CH2 power ON
CH2 protection status (output) CH2 normal CH2 protection activated (irregular)
CH2 power ON/OFF status (output) CH2 power OFF CH2 power ON
GND (input/output)
––
Fan operation status (output) Fan stop (irregular) Normal
CH3, 4 CH3 power ON/OFF control (input) CH3 power OFF CH3 power ON
CH3 protection status (output) CH3 normal CH3 protection activated (irregular)
CH3 power ON/OFF status (output) CH3 power OFF CH3 power ON
CH4 power ON/OFF control (input) CH4 power OFF CH4 power ON
CH4 protection status (output) CH4 normal CH4 protection activated (irregular)
CH4 power ON/OFF status (output) CH4 power OFF CH4 power ON
GND (input/output)
––
Fan operation status (output) Fan stop (irregular) Normal
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
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