ADVANTECH PCLD-788

PCLD-788
16-ch Relay Multiplexer Board
Features
ƒƒ 16 to 1 channel expansion
ƒƒ Differential and fully isolated multiplexing
ƒƒ Break-before-make relay control
ƒƒ “Channel closed” signal for precise A/D triggering
ƒƒ Up to 16 PCLD-788s can be cascaded for 256 channels
ƒƒ Easy wiring for large channel count configuration
ƒƒ Onboard cold-junction circuitry for thermocouple measurement
Introduction
PCLD-788 multiplexes 16 channels into a single I/O channel of an A/D converter, voltmeter or IEEE-488-based instrument. Up to 16 PCLD-788s can be cascaded for a total of 256
fully-isolated differential channels. The PCLD-788 can be controlled by any PC-LabCard™ product via a 16-bit 20-pin digital output port, found on cards such as the PCL-711B,
PCL-812PG or the PCL-818 series. Channel selection (0-15) and board selection (0-15) are done by programming the high-order four bits and low order four bits of a digital output
byte from the main I/O card in use.
Specifications
I/O
ƒƒ Channel Closed Signal
ƒƒ Cold-junction Sensor
Output
ƒƒ Contact Rating
ƒƒ Contact Resistance
ƒƒ Input Channels
ƒƒ Programming
ƒƒ
ƒƒ
ƒƒ
ƒƒ
ƒƒ
ƒƒ
TTL-level pulse
+24.4 mV/° C, 0 V at 0° C
Break-before-make with 3 msec. minimum break time
200 mΩ max.
16 isolated differential inputs
DO bit 0, 1, 2 and 3 for channel selection, DO bit 4, 5,
6 and 7 for board selection. Onboard DIP switches for
board-address setting
Max. Input Voltage
100 VDC or 100 V peak AC
Max. Switching Current 0.5 A
Max. Switching Power 10 VA
Operating Time
1 ms max.
Relay Life Expectancy 100 million cycles min. at 10 VDC and 1 mA
Release Time
1 msec. max.
PCLD-788 Block Diagram
Pin Assignments
General
ƒƒ Certifications
ƒƒ Connectors
Controller:
I/O:
ƒƒ Dimensions (L x W)
ƒƒ Mounting
ƒƒ Power Consumption
CE
2 x 20-pin box header, second connector in parallel for daisy chaining
Screw terminals
205 x 114 mm (8" x 4.5")
4 x screw holes for flat surface mounting
+5 V @ 380 mA max.
Ordering Information
ƒƒ PCLD-788
ƒƒ PCL-10120-1
ƒƒ PCL-10120-2
16-ch Relay MUX Board w/ Two 20-pin Flat Cables
20-pin Flat Cable, 1 m
20-pin Flat Cable, 2 m
Online Download www.advantech.com/products