RGH40 RGS40-G
installation guide
11
Limit output
†
Select R so that the maximum current
does not exceed 20 mA.
Alternatively, use a suitable relay or
opto-isolator.
5 V to 24 V
V
p
V
q
P Q
R
†
Recommended signal termination
Digital outputs – RGH40T, D, G, X, N, W, Y, H
IMPORTANT:
The outer shield should be connected to the machine earth (Field Ground). The inner shield should be connected
to 0 V at receiving electronics only. 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.
Electrical connections
Grounding and shielding
RGH40
Customer
electronics
Extension cable
*
Inner shield
Outer shield
Output
signals
0 V
5 V
*
Contact Renishaw for information about using extension cables.
Single ended alarm signal termination
(option 05)
Customer
electronics
5 V
4k7
Ω
4k7
Ω
1k8
Ω
100
Ω
100nF
E-
Readhead
Analogue output – RGH40A
120
Ω
V
0
V
1
V
2
+
V
0
V
1
V
2
-
Standard RS422A line receiver circuitry
Capacitors recommended for improved noise immunity.
Customer
electronics
120
Ω
A B Z-
Cable Z
0
= 120
Ω
Readhead
A B Z+
0 V
0 V
220 pF
220 pF