Spellman MPD2.5P10/24 - Digital Control

Spellman High Voltage Electronics Limited - Company Confidential
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81408-4r2 MPD Series Installation and User Guide
Page 14 of 29
4.2 Digital Control
The units operate with a simple ASCII protocol see document number 48113-21 which
covers systems with both single and multiple slaves. The following parameters apply.
PARAMETER
MIN.
VALUE
MAX.
UNITS
Digital Mode - RS232 or RS485
Low = RS485
Open circuit = RS232
Enable - Active low enable, input impedance.
Designed to be operated by TTL, CMOS logic or
open collector transistor or software command.
10
kΩ
Voltage control resolution
16
Bit
Monitor resolution
16
Bit
The following sections describe the circuits used for RS232 and RS485 to make digital
(serial) connection the MPD HV units; refer to Table 1 for pin out details.
The units are controlled using a Graphical User Interface (GUI), for more information on a
GUI refer to Appendix 4.