19
When using with the AT8657/LED
ATUC-50IU
GND1
51
2 4
3
COLD2
HOT3
TALK LED: LOW/HI11
TALK ON (INVERT)21
When using with the U891RCx
BK: GND
WH: LED CONTROL
BL: CONTACT CLOSURE
RD: COLD
YL: HOT
SH: GND
ATUC-50IU
GND1
COLD2
HOT3
TALK LED: LOW/HI11
TALK ON19
GND23
• Do the following settings for the U891RCx.
SW.FUNCTION: MOM. ON
CONTROL: LED Remote
Mounting an IU
• When securing in two directions
Align the IU with the edge of a table, etc., and then fasten it with screws.