Connector / Pin Assignment / Signal
COM2 / 4 RTS
COM2 / 5 CTS
COM2 / 6 Not connected
COM2 / 7 Signal Ground
COM2 / 8 Signal Ground
COM2 / 9 +5 V
The assignment of the serial interface COM2 has not changed.
Fig. 35: Serial interface COM2
G: Housing FE (shield)
1: FE FE (shield)
2: TxD Transmit data (output)
3: RxD Receive data (input)
4: RTS Request to send (output)
5: CTS Clear to send (input)
6: NC -
7: SGND Signal ground (SGND)
8: 0 V out -
9: +5 V out Reserved
Networking interface
The existing device 07KT9x-AD has a parallel interface for connection to the coupler. Additional
information upon request.
1.4.1.3.2 SmartMedia Card 07 MC 90
The content of this chapter is invalid. Another memory card is used in the CPU (SD Memory
Card MC502).
For further information on the memory card, please refer to the AC500 documentation.
1.4.1.3.3 High-speed counter
When using the counter inputs (terminal 4.0 and 4.1), an external resistor 470 Ω / 1 W must be
connected upstream. There are 10 operating modes available. The terminal 1.0 can be config-
ured as output for the high-speed counters. Please note that this can result in delays of up to
2.5 ms.
For further information on high-speed counters, please refer to the AC500 documentation.
Replacement devices: CPU > Replacement device 07KT9x-AD
2018/09/24 3ADR010122, 8, en_US 43
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