Electrical Connections - Renishaw RGH24 Installation Manual

Electrical connections

Grounding and shielding
RGH24
Inner shield
Outer shield
*
Maximum extension cable length
RGH24B - 100 m, RGH24D, X and Z - 50 m, RGH24W, Y, H, I and O - 20 m
IMPORTANT: The outer shield should be connected to the machine earth (Field Ground). The inner shield should be connected
to 0 V. Care should be taken to ensure that the inner and outer shields are insulated from each other. If the inner and outer shields
are connected together, this will cause a short between 0 V and earth, which could cause electrical noise issues.
Recommended signal termination
Digital outputs - RGH24D, X, Z, W, Y, H, I and O
0 V
Readhead
A B Z Q+
Cable Z = 120R 120R
0
A B Z Q-
0 V
Standard RS422A line receiver circuitry
Capacitors recommended for improved noise immunity.
RGH24 RGS20 installation guide
Extension cable*
Customer
220 pF
electronics
220 pF
Customer
electronics
5 V
Output
signals
0 V
Analogue output - RGH24B
V V V +
0 1 2
120R
V V V -
0 1 2
Remote LED driver outputs
JST connector version allows for remote
monitoring of readhead status.
150R
Green
+
Red/Green
LED
Green
Red
–
Red
8