Yard Vacuum User Manual

9300 Series User’s Guide Relay Expansion Board (Grayhill Rack)
Chapter 7 - Hardware Reference Page 165
Relay Expansion Board (Grayhill Rack)
The optional relay extension board allows for custom digital output applications
using specific Grayhill modules. This option includes a 4-position Grayhill module
rack and one of two power supplies:
 a 100-240 VAC/110-370 VDC to 5 VDC power supply
 a 20-60 VDC to 5 VDC power supply
NOTE
The meter’s digital outputs can be wired directly (without the use of the Grayhill rack), as long as the
external power supply you use does not exceed 30 VDC/80 mA.
4
3
2
1
AC INPUT DC INPUT
AC OUTPUT DC OUTPUT
B
R
W
Y
9
8 7 6 5
4
3 2
1
Grayhill Rack
part # 70GRCK4R
D4 control module (module 4)
D3 control module (module 3)
D2 control module (module 2)
D1 control module (module 1)
Wire sizes will vary depending on application
These numbers indicate
which Grayhill module is
controlled by D1 to D4.
+5 VDC
output
Power Supply
AWG 20 to AWG 16