Spectra Precision SP90m - Power In, Serial Port A; Serial Port B

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Power In, Serial Port A
On rear panel. A 7-C Connector.
NOTE: All signals are electrically isolated from the chassis
ground and power source.
Serial Port B
On rear panel. A switchable RS232/RS422 serial port +
external event input.
A 9-C connector fitted with a sealing cap.
Pin Signal Name Description
1 GND-A
Ground for serial port (electrically isolated from chassis
ground)
2 PWR IN –
Ground for power input (electrically isolated from chassis
ground)
3 TXD (Output) Port A RS232 TXD
4 RTS (Output) Port A RS232 RTS
5 CTS (Input) Port A RS232 CTS
6 PWR IN + External Power Input (9-36 V DC)
7 RXD (Input) Port A RS232 RXD
Pin RS232 RS422
1NC NC
2 RX (IN) RX+ (IN)
3 TX (OUT) TX– (OUT)
4NC NC
5 GND-B GND-B
6NC NC
7 RTS (OUT) TX+ (OUT)
8 CTS (IN) RX– (IN)
9 EVENT EVENT (IN)
1
7
6
52
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