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Appendix BSpecifications
101
Connection Terminals
SIG: Connects to the SIG terminal of the B7A Link Terminal.
V–: Connects to the negative power terminal of the B7A Link Terminal.
Caution If
the terminals are not connected
correctly
, the internal circuitry of the B7A Link T
erminal will be
damaged.
Note 1. The transmission cable must be a VCTF cable with a thickness of 0.75 mm
2
minimum.
2. Do not wire power lines or high-tension lines along with the transmission cable in the same conduit.
Input Mode Selector
The B7AI1 incorporates an input mode selector on the back panel of the Unit,
with which the following modes can be set.
Input mode 15 points + 1 error 16 points
Function Fifteen-point input from the B7A Link
Terminal is effective. Bit 15 is used as
transmission error bit.
Sixteen-point input from the B7A Link
Terminal is effective.
Switch setting Upper side Lower side
Bit no.
00 to 14 Input 00 to input 14 Input 00 to input 14
allocation
15 Transmission error bit
Input 15
Status of input indicator lamp 15 Not used Lit when input 15 is ON. Not lit when
input 15 is OFF.
Status of the ERR indicator Lit when there is a transmission error and OFF during normal transmission
The
ERR indicator is lit when an error occurs. If the error is corrected, the ERR indicator is OFF at the next trans
-
mission cycle.
When
there is a transmission error
, the B7A Link T
erminal will hold the data just before the occurrence of the trans
-
mission
error
. If there is a transmission error because the B7A Link T
erminal is
turned of
f, however
, data 0 is trans
-
mitted in the first transmission cycle when the B7A Link Terminal is turned on again.
Transmission errors between the C200H-B7A01 and B7A Link Terminal
are detected by the B7A Link T
erminal
only. Check the ERR indicator and error bit for any error.
Performance Specification
Item C200H-B7AI1 C200H-B7AO1
I/O points 16 points or 15 points and 1 error
input
16 output points
Transmission distance 500 m max. if power is supplied to the Interface Unit and B7A Link Terminal
separately.
100 m max. if power is supplied to the Interface Unit and B7A Link Terminal
from a single power supply.
Transmission delay Typ. 19.2 ms, 31 ms max.
Minimum input time (see note 2) --- 16 ms
Internal current consumption 5 VDC, 100 mA max.
External power supply (see note 1) 12 to 24 VDC ±10%, 10 mA min. 12 to 24 VDC ±10%, 30 mA min.
Weight 200 g max.
Note 1. The external power supply capacity does not include the capacity required by the B7A Link Terminal.
2. The
minimum input time is the minimum time
required to read input signals from the CPU. Be sure that
the ON/OFF width of signals sent to B7A Interface Unit output relays is at least 16 ms.
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