PRECISION DIGITAL Minimux II PD138, Instruction Manual

Page: 7 / 36

PD138 Minimux
®
II Temp & Process Scanner Instruction Manual
7
SPECIFICATIONS
Number of Channels per
Minimux 8 double-pole channels per unit
Number of Channels per
System Unlimited
Signals Switching DPST reed relays
Contact Resistance 0.2
Ÿ
maximum
Maximum Input Voltage 200 V (switched or common mode)
Maximum Current
Switched 0.5 A
Maximum Power Switched 10 W
Dwell Time Each channel adjustable from 0.6 to 30
seconds
Non-Volatile Memory All programming values are stored in non-
volatile
memory for ten years if power is lost
Scan Method Internal or manually controlled
Channel Indication Green LED on front panel
Disabling Channels Any channel may be disabled
Scan Stop The scan may be stopped by pressing and
holding the STOP/GO button for more than 0.5
seconds. The scan may be resumed by
pressing and releasing the STOP/GO button
quickly (less than 0.5 seconds)
Alarm Input Independent alarm input for each channel.
Input Impedance; 25 Kohm, typical pull-up to 5
V
Alarm Sequence Sequence A or Sequence F2A (First-Out)
Alarm Outputs Alarm condition indicated by:
1.
Front panel red LED for each channel.
2. Relay, 1 SPDT (form C); rated 2 A @ 30
VDC or 2 A @ 250 VAC resistive load;
1/14 HP @ 125 / 250 VAC for inductive
loads. For fail-safe operation, the relay is
energized in the non-alarm state. In the
case of a power failure, the relay will go to
the alarm state, (NC contact is connected
to common).
3. Built-in horn, 85 dB.
4. Stop-on-alarmed-channel (user select)
Alarm Acknowledge Front panel ACK and rear connector terminals
External Switch Functions The functions of the front panel buttons are
available at screw terminals at the rear of the
instrument
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