Rockwell Automation Liqui-Flo DBT Reach Drive - Manual (Page 17)

Installation/Wiring 2-11
2.5.2 Encoder Terminal Block
Table 2.3 – Encoder Terminal Designations
No. Description
8
+12V
1
DC Power
1. Jumper selectable +5/12V is available on 20B-ENC-2 Encoder Boards only.
Internal power
source
250 mA.
7 +12V(1) DC
Return (Common)
6 Encoder Z (NOT) Pulse, marker or
registration
input.
2
2. Z channel can be used as a pulse input while A & B are used for encoder.
5 Encoder Z
4 Encoder B (NOT) Quadrature B
input.
3 Encoder B
2 Encoder A (NOT) Single channel
or quadrature A
input.
1 Encoder A
Table 2.4 – Sample Encoder Wiring
I/O Connection Example I/O Connection Example
Encoder
Power
– 1 Internal
Drive Power
Internal
(drive) 12V
DC, 250mA
1. SHLD connection is on drive chassis.
Encoder
Power
–External
Power
Source
Encoder
Signal
–Single-
Ended, Dual
Channel Encoder
Signal
–Differential,
Dual Channel
8
1
Common
+12V DC
(250 mA)
1
2
3
4
5
6
7
8
to SHLD
+ Common
External
Power
Supply
to
SHLD
B
B NOT
A NOT
A
Z
Z NOT to SHLD
to Power Supply
Common
1
2
3
4
5
6
7
8 to SHLD
1
2
3
4
5
6
7
8
B
Z
A NOT
B NOT
Z NOT
A