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Summary

Wiring diagram of external signaling in conjunction with the C-123L/A or C-123LW. This can be used to trigger a bell, buzzer, sounder or anything that requires a contact closure when a call is placed from the door station.  

Solution

[post_title] => External Signaling using the C-123L/A or C-123LW [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => open [post_password] => [post_name] => external-signaling-using-the-c-123l-a-or-c-123lw [to_ping] => [pinged] => [post_modified] => 2025-03-12 08:41:14 [post_modified_gmt] => 2025-03-12 15:41:14 [post_content_filtered] => [post_parent] => 0 [guid] => https://aiphone.local/kb/external-signaling-using-the-c-123l-a-or-c-123lw/ [menu_order] => 0 [post_type] => kb [post_mime_type] => [comment_count] => 0 [filter] => raw ) [1] => WP_Post Object ( [ID] => 36867 [post_author] => 23 [post_date] => 2021-07-26 18:15:21 [post_date_gmt] => 2021-07-27 01:15:21 [post_content] =>

Ensure the SKK-620C is correctly grounded 

  

In a dual-master station system, a loud feedback sound is heard at both master stations. 

This can be caused by a common power supply and/or missing DAK-2S. If both C-ML/A master stations share the same power supply, a ground loop feedback will occur when the talk button is pushed. Install separate SKK-620C power supplies or install batteries for each master station. The DAK-2S "Dual Master Component Modules" must also be installed per the wiring diagram below:          

Communication timeout issues 

If the resistance of the wire is too large, usually from exceeding distance limitations, the master station may not time out as designed. 22AWG = 245'  18AWG = 490'    

Communication volume is too loud or too soft 

It's possible the volume control is not adjusted properly. Remove the front cover of the C-ML/A and locate the volume potentiometer through a hole located at the bottom of the station. Use a small screwdriver to adjust the volume; clockwise to increase, and counterclockwise to decrease. Do not turn the potentiometer too hard in either direction or damage may occur.    [post_title] => Common Communication Troubleshooting for the C-123 Kit [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => open [post_password] => [post_name] => common-communication-troubleshooting-for-the-c-123-kit [to_ping] => [pinged] => [post_modified] => 2025-03-12 08:41:18 [post_modified_gmt] => 2025-03-12 15:41:18 [post_content_filtered] => [post_parent] => 0 [guid] => https://aiphone.local/kb/common-communication-troubleshooting-for-the-c-123-kit/ [menu_order] => 0 [post_type] => kb [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => WP_Post Object ( [ID] => 36872 [post_author] => 23 [post_date] => 2021-07-26 18:17:44 [post_date_gmt] => 2021-07-27 01:17:44 [post_content] =>

Summary 

Upon power up, the C-ML/A maser station squeals and the batteries seem to overheat.   

Cause 

Power supply and batteries are both installed.   

Solution 

Take batteries out of the C-ML/A master station if powered with an SKK-620C power supply. Both power sources cannot be used simultaneously.     Per the C-123 instruction manual:  [post_title] => C-123 Speakers Squeal and Station Overheats [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => open [post_password] => [post_name] => c-123-speakers-squeal-and-station-overheats [to_ping] => [pinged] => [post_modified] => 2025-03-12 08:41:18 [post_modified_gmt] => 2025-03-12 15:41:18 [post_content_filtered] => [post_parent] => 0 [guid] => https://aiphone.local/kb/c-123-speakers-squeal-and-station-overheats/ [menu_order] => 0 [post_type] => kb [post_mime_type] => [comment_count] => 0 [filter] => raw ) [3] => WP_Post Object ( [ID] => 37164 [post_author] => 18 [post_date] => 2021-08-15 20:51:52 [post_date_gmt] => 2021-08-16 03:51:52 [post_content] =>

Line Drawing

Specifications

Power Source

6V DC or Four C Batteries

Current Consumption

Maximum 85mA

Communication

Press-to-talk

Output

100mW

Wiring

2-cond., overall shield - use Aiphone #822202(22AWG) or #821802(18AWG)

Wiring Distance

245' (22AWG) or 490' (18AWG)

Mounting

Surface wall mount

Electrical Box

Single-gang box

Battery Life

One year(approx.) Underuse of 5 sec. calling, 20 sec. communication, 10 times a day

Dimensions

7-1⁄2" x 5-1⁄8" x 1-³⁄4"

Weight

Approx. 0.82lbs (370g) [post_title] => C-ML/A Technical Specifications [post_excerpt] => [post_status] => publish [comment_status] => open [ping_status] => open [post_password] => [post_name] => c-ml-a-spec-sheet [to_ping] => [pinged] => [post_modified] => 2025-03-13 10:26:22 [post_modified_gmt] => 2025-03-13 17:26:22 [post_content_filtered] => [post_parent] => 0 [guid] => https://aiphone.local/kb/c-ml-a-spec-sheet/ [menu_order] => 0 [post_type] => kb [post_mime_type] => [comment_count] => 0 [filter] => raw ) ) [post_count] => 4 [current_post] => -1 [before_loop] => 1 [in_the_loop] => [post] => WP_Post Object ( [ID] => 36862 [post_author] => 23 [post_date] => 2021-07-26 18:09:10 [post_date_gmt] => 2021-07-27 01:09:10 [post_content] =>

Summary

Wiring diagram of external signaling in conjunction with the C-123L/A or C-123LW. This can be used to trigger a bell, buzzer, sounder or anything that requires a contact closure when a call is placed from the door station.  

Solution

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