Remote Analog Programming; Remote Programming By Resistance - Ametek ASTDC60D1C-E00 Programming Manual

External User Control Signal Connector

REMOTE ANALOG PROGRAMMING

8.3
Remote programming is used for applications that require the output parameters be
programmed (controlled) from a remote instrument. An external resistance or voltage
or 4-20mA can be used as a programming source. External Source of programming
(Resistance, Voltage or 4-20mA) is common for Output Voltage, Current and Power
when remote programming mode is selected as External. When using remote
programming, a shielded, twisted-pair cable is recommended to prevent noise
interference to programming signals.

REMOTE PROGRAMMING BY RESISTANCE

8.3.1
Remote Analog reference source of the Output Voltage, Current and Power can be
selected as resistance by sending the following SCPI Command:
SOUR:ANALOG:PROG:SOUR CURR
8.3.1.1 R C
EMOTE URRENT
Analog Reference source is selected as Resistance and programming mode of output
current as external by sending following SCPI commands.
SOUR:ANALOG:PROG:SOUR CURR
SOUR:CURR:PROG EXT
The resistance-programming
(100% rated output current) / 5 kΩ, with input at Pin 20 (IPRG_ISOUR) and return to
Pin 18 (RTN_PRG). Refer to Figure 8-3. An internal current source, factory-set at 1
mA, from Pin 20 is utilized to drive the resistance. This produces a transfer function
for output current, as follows:
Iout = R * (100% rated output current) / 5 kΩ), with R in kohms.
Full Scale current programming resistance can be modified from default 5kOhms to
any other value, from 2 kOhm to 10 kOhm.
For example, To set 10 kOhms as full scale for Current programming send below
command.
SOUR:CURR:PROG:FSCR 10
Then the transfer function for output current, as follows:
Iout = R * (100% rated output current) / FSC kΩ), with R in kohms.
If multiple switches or relays are used to select resistors to program different current
levels, make-before-break contacts are recommended.
8-10
P R
ROGRAMMING BY ESISTANCE
default
Asterion DC Series Programming
coefficient for output
M330461-01 Rev A
current is