Spellman MPD2.5P10/24 - Operation of the Units; Analogue Control

Spellman High Voltage Electronics Limited - Company Confidential
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81408-4r2 MPD Series Installation and User Guide
Page 10 of 29
4. Operation of the Units
The units are operated by either analogue input, using any of the methods detailed below, or
by digital control using an RS232/485 serial port with a PC connection and a suitable
interface.
4.1 Analogue Control
4.1.1 Control and Monitoring Signals
The units are controlled and monitored using the following analogue signals.
PARAMETER
MIN.
VALUE
MAX.
UNITS
Voltage control: 0 to 10V = 0 to Full scale output V
(i)
-1
+1
%
Voltage reference output (wrt signal ground)
10
V
Enable: Active low enable, input impedance.
Designed to be operated by TTL or CMOS logic or
open collector transistor.
10
kΩ
Voltage monitor: 0-10V for 0 to full scale output (wrt
signal ground)
-1
+1
%
Current monitor: 0-10V for 0 to full scale output (wrt
signal ground)
-1
+1
%
Note:
(i) a stable, low noise reference source is recommended to achieve full unit performance.
The following sections describe the various connections that can be used to control the
MPD HV units.