RGH34 RGS40
installation guide
10
Electrical connections
Grounding and shielding
Conductive
mounting plate
Interface ‘case’
connected to
ground
Output
signals
Inner shield
Outer shield
0 V
Double-shielded extension cable
*
Conductive
shield
FPC Cable
RGH34
readhead
Case
*
Maximum extension cable length
RGI34B-100 m, RGI34T, D, G and X - 50 m, RGI34N, W, Y and H - 20 m
Recommended signal termination
Digital outputs - RGI34T, D, G, X, N, W, Y and H
Analogue output - RGI34B
V
0
V
1
V
2
+
V
0
V
1
V
2
-
120
Ω
Standard RS422A line receiver circuitry
Capacitors recommended for improved noise immunity.
Customer
electronics
120
Ω
A B Z Q-
Cable Z
0
= 120
Ω
Interface
A B Z Q+
0 V
0 V
220 pF
220 pF
Remote LED driver outputs
The remote LED driver output allows remote monitoring of readhead installation.
Green
Red
Red/Green
LED
150
Ω
+
–
Green
Red
For optimum performance, ensure 100% screening
• Ground the readhead mounting bracket
• Ensure continuity of all shields
• Use double shielded extension cable
• Connect interface CASE to ground
• Use shielded connector shells on all cable connections
• Terminate the inner shield to 0V power at the customer interface
• Maximise the distance between encoder and motor cables