YASKAWA L1000A Series Technical Manual page 61

S eparate w iring fo r o u tp u t term in als MA, MB, MC, M1 an d M 2 from w iring to o th e r c o n tro l c ircu it lines. Im p ro p e r w iring
p ra c tice s c o u ld re s u lt in drive o r e q u ip m e n t m a lfu n c tio n o r n u isa n ce trips.
S eparate c o n tro l circu it w iring from m ain c ircu it w iring (term in als R/L1, S/L2, T/L3, B1, B2, U/T1, V/T2, W /T3, -, +1, +2) and
o th e r h ig h -p o w e r lines. Im p ro p e r w iring p ra ctic e s c o u ld re s u lt in drive m a lfu n ctio n due to e le ctrica l interference.
Use a cla ss 2 p o w e r s u p p ly (UL standard) w hen co n n e ctin g to the c o n tro l term inals. Im p ro p e r a p plicatio n o f p e rip h e ra l
de vice s c o u ld re s u lt in drive pe rfo rm a n c e de gra d a tio n due to im p ro p e r p o w e r supply.
D o n o t e xc e e d 5 0 m eters (164 feet) fo r the c o n tro l lin e b e tw e e n the drive a n d the o p e ra to r w hen u sin g an a n a lo g sig n a l from
a re m o te sou rce to s u p p ly the fre q u e n cy reference. F ailure to c o m p ly c o u ld re su lt in p o o r system pe rform ance.
D o n o t use u n s h ie ld e d cab le fo r co n tro l wiring. F ailure to co m p ly m a y cau se e le c tric a l in te rfe re n ce re su ltin g in p o o r system
pe rfo rm an ce. Use shielded, tw is te d -p a ir wires, a n d g ro u n d the sh ie ld to the g ro u n d te rm in a l o f the drive.
Insu late shield s with tape o r sh rin k tu b in g to p re v e n t co n ta ct with o th e r sig n a l lines a n d equipm ent. Im p ro p e r w iring pra ctices
co u ld re su lt in drive o r e q u ip m e n t m a lfu n ctio n due to sh o rt circuit.
Figure 3.20 Figure 3.21
Wire Size on page 64
Use s h ie ld e d tw is te d -p a ir cab le s as in d ic a te d to p re v e n t o p e ra tin g faults. Im p ro p e r w iring p ra ctice s c o u ld re s u lt in drive or
e q u ip m e n t m a lfu n ctio n due to e le c trica l interference.
3.8 Control Circuit Wiring
Figure 3.22.
T .