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Important:
plate or the screw with the green wire
of the HandKey reader to earth
ground! Doing so may cause damage
to the HandKey unit.
mandatory 18 AWG or larger
jumper from –VIN to terminal 10
112.1.4
Signal Ground
The RS-485 signal ground connection (TB2 GND) needs to be connected to the HandKey signal ground.
There is no specific terminal designated for this purpose on the HandKey, but any of the following terminals
are appropriate for this purpose:
•
HandKey F1 Signal Ground Terminals: 8, 10, 12, 14, 18, 20, 22, 24, or 26
•
HandKey F3 Signal Ground Terminals: 4, 10, or 13
HandKey version F3
Back of Handkey CR Reader
Do not ground the rear
For DC powered units only,
1 2 3 4 5 6 7 8
TXD
TR1+
RXD
TR1-
RTS
R1+
CTS
R1-
GND
TR2+
TR2-
GND
TR3+
TR3-
GND
Hardware Installation Guide
Top of Reader
9
10 11 12 13 14
15 16 17 18
2
1
+
–
12-24
VDC or VAC
589
revision 7 —
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