MKS Granville-Phillips 358 series, Instruction Manual

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Chapter 2
18
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
2.2 RS-232 Specifications
Figure 2-6 RS-232 Wiring Connector
DB–25S connector
See Section 3.12 for
connector pin assignments.
Table 2-1 RS-232 Specifications
Item Specification
Format EIA standard RS-232-C, half duplex, asynchronous
Data Rates 75,150,300,600,1200,2400,4800,9600 baud
Character length 7 or 8 bit ASCII, switch selectable
Parity Odd, even, or none, switch selectable
Stop bits 1 or 2. 8 character bits plus parity allows only 1 stop bit
Handshake Outputs: DTR,RTS. RTS polarity selectable. Inputs: DSR, CTS, DCD. May be
forced to logic “TRUE” with switches
Logic levels Inputs: Logic 1, 2.0 Vdc minimum,15 Vdc maximum, logic 0, –15 Vdc minimum,
0.75 VDC maximum
Input Current: 4.0 mA max @ Vin = +15 Vdc, –4.0 mA max @ Vin = –15 Vdc