General Specifications; Electrical Connections - Renishaw RCH25U30J00A Installation Manual

General specifications

Power supply
RGH24 5 V ± 5%
RGH25+RGB25 5 V ± 5%
(system)
RGH25UHV 5 V ± 5%
(readhead only)
Ripple
Bake-out temperature
Sealing
(readhead)
Acceleration operating
(readhead)
Shock non-operating
(readhead)
Vibration operating
(readhead)
Mass
Cable Standard
UHV
The RGH24/ 25 series readheads have been designed to the relevant EMC standards, but
must be correctly integrated to achieve EMC compliance. In particular, attention to shielding
arrangements is critical. Renishaw recommends the use of a double screened cable to
connect RGH24 JST as used in the cable variants of the RGH24/ 25.
NOTE: Class 1M LED product. LED radiation. Do not view directly with optical instruments.

Electrical connections

RGH24 grounding and shielding
RGH24
Inner shield
Outer shield
*Maximum extension cable length:
RGH24B -100 m, RGH24D, X, Z - 50 m, RGH24C-30 m, RGH24W, Y, H, I, O -20 m
120 mA
200 mA
50 mA
NOTE: For digital outputs, current consumption figures
refer to unterminated readheads / interfaces.
A further 25 mA per channel pair (eg A+, A-) will be
drawn when terminated with 120 Ω.
Renishaw encoder systems must be powered from a
5 V dc supply complying with the requirements for
SELV of standard EN (IEC) 60950.
200 mVpp maximum@ frequency up to 500 kHz maximum
120 °C (RGH25UHV only)
IP40
500 m/s 2 BS EN 60068-2-7:1993
(IEC 68-2-7:1983)
1000 m/s 2 , 6 ms, ½ sine BS EN 60068-2-27:1993
(IEC 68-2-27:1987)
100 m/ s 2 , 55 Hz to 2000 Hz BS EN 60068-2-6:1996
(IEC 68-2-6:1995)
RGH24: 11 g RGH25: 9 g
RGB25 interface: 95 g
Cable: standard 34 g/m UHV 23 g/m
Double shielded, maximum outside diameter 4.4 mm.
6
Flex life >20 x 10 cycles at 20 mm bend radius.
Single tinned copper braided shield over PTFE
insulated cores.
NOTE: standard 15 pin 'D' type connector fitted is
not vacuum compatible.
Customer
electronics
Extension cable*
5 V
Output
signals
0 V
RGH25 and RGB25 grounding and shielding
Inner shield
RGH25
(except UHV)
Outer shield
Pin 15
**Maximum extension cable length:
RGB25B-100 m, RGB25D, X, Z - 50 m, RGB25C-30 m, RGB25Y, H - 20 m
Recommended signal termination
Digital outputs - RGH24D, X, Z, W, Y, H, I, O - RGB25D, X, Z, Y, H
#
Only required on alarm channel E (not RGH24)
Readhead/ interface
A B Z E Q+
Cable Z
A B Z E Q-
Analogue outputs - RGH24B, RGB25B
V V V +
0 1 2
120R
V V V -
0 1 2
Remote LED driver outputs
The output of the integral set-up LED
is available from the JST connector
versions only to allow remote
monitoring of readhead installation.
RGB25
Extension cable**
0 V power
5V
Customer
#
1k
electronics
= 120R
120R
0
#
1k
0 V
150R
Green
+
Green
Red
–
Customer
electronics
5 V
Output
signals
0 V
Red/Green
LED
Red