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Pin assignment of TTL encoder

The pinout for the TTL encoder is executed in a 15-pin SUB-D connector (X8) with the following assignment:

Connection	X8 pin no.	Assignment TTL encoder	Assignment TTL encoder simulation
Female	1	A-	-
	2	A+	-
	3	+5 V (+/-) 5%, Imax = 250 mA loop-controlled	-
	4	-	A+
	5	-	A-
	6	B -	-
	7	-	R+ (zero pulse)
	8	+5 V	-
	9	R- (zero pulse)	-
	10	R+ (zero pulse)	-
	11	B+	-
	12	-	R- (zero pulse)
	13	-	GND
	14	-	B+
	15	-	B -

Tabelle: Pin assignment of TTL encoder

Cable type and layout

The cable type should be chosen as specified by the motor/encoder manufacturer.

Recommended:

• TTL signal evaluation: 3 x 2 x 0.14 mm2 and 1 x 2 x 0.5 mm2
• TTL encoder simulation: 4 x 2 x 0.14 mm2

The following conditions must be met:

• Use only shielded cables.
• Shield on both sides.
• Interconnect the differential track signals A, B and R by twisted cable strands.
• Do not separate the encoder cable, for example to route the signals via terminals in the cabinet.