22
Wiring Terminals
Section 2-2
Event Inputs
Connect event inputs across terminals A4 and A6 for the HFU.
• The inflow current is approximately 4 mA.
• Use event inputs under the following conditions:
Communications
• For communications with the host, connect communications across termi-
nals B7 and B8 or terminals A7 to A9 on the HFU or connect across ter-
minals 1 and 2 on the EDU.
Note
• If there are problems with communications noise performance when using
the port A connector, connect 110 to 125
Ω
of terminating resistance
across terminals 1 and 2 of port A on the EDU.
• Specify both ends of the transmission path, including the host computer,
as end nodes (i.e., connect terminators to both end). The minimum termi-
nating resistance is 54
Ω
.
Contact inputs
ON: 1 k
Ω
max., OFF: 100 k
Ω
min.
Non-contact
inputs
ON: Residual voltage: 1.5 V max., OFF: Leakage current: 0.1 mA
max.
A1
A2
A3
EV4
EV3
A4
A5
A6
EV2
EV1
A1
A2
A3
EV4
EV3
A4
A5
A6
EV2
EV1
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
HFU
Non-contact inputs
Contact inputs
+
+
−
+
+
−
B7
B8
RS-485
RS-232C
DO NOT USE
RS-422
RS-422
1
2
HFU
A7
A8
A9
SD
RD
SG
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
HFU
1
2
3
4
5
6
7
8
9
EDU
EDU
Port C communications
RS-485
Port A communications
B (+)
A (
−
)
B (+)
A (
−
)
RDB (+)
RDA (
−
)
SDB (+)
SDA (
−
)
Summary of Contents for EJ1G
Page 3: ...iv ...
Page 17: ...xviii ...
Page 21: ...xxii ...
Page 53: ...32 Unit Configuration Examples Section 2 4 ...
Page 69: ...48 Changing SPs During Operation Section 3 3 ...
Page 81: ...60 Other Functions Section 4 5 ...
Page 145: ...124 Other HFU Functions Section 5 7 ...
Page 167: ...146 Detailed Description of Services Section 6 4 ...
Page 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
Page 237: ......