Specifications

A-41
800-TEC-ENGR
www.avg.net
Position Transducers/Sensors
SECTION
A
M1890 SPECIFICATIONS
Input Power:
105-135 V; 50/60 Hz, 35 VA max.
Operating Temperature:
-10 °F to +130 °F (-23.3 °C to 54.4 °C)
INPUT SIGNAL:
M1890-R: Resolver Input
AVG Automation's RL100, E7R, E8R, or RL101 series
M1890-S: Selsyn Input
Signal: 3-wire, 148 kΩ impedance, 48-90 V, L-L
Reference: 2-wire, 105-135 V, 50/60 Hz, 35 VA max.
Tracking Speed: 1800 RPM max
Resolution: 8-, 10-, or 12-bits-per-revolution; 1 part in 100,000
total
PROGRAMMING:
Scale Factors: 0.001 to 65,535.999 in increments of 0.001
Preset Numbers:
Multi-turn:
0 to 99,999
Single-turn: 0 to (Scale factor-0.001)
Decimal Point: After any digit
Freeze, Preset, Reset, and Supervisory Inputs:
Contact closure to signal reference or 5 V logic
Logic TRUE: 0-1 VDC (4.7 kΩ internal pull-up resistors)
Logic FALSE: 4-5 VDC
Power Interruption and Watch-dog Relay:
1 Form C contact, 120 VAC, 1 A
PARALLEL POSITION OUTPUTS:
a) 1855 Parallel Bus (Standard):
Compatible with AVG Automation's 1855 bus; 5-digit BCD; 5
V CMOS logic; Fan out of 1 driving LS TTL load; High Logic
TRUE
Logic TRUE: 2.4 V @ 1.6 mA PNP (sourcing) current
Logic FALSE: 0.4 V @ 1.6 mA NPN (sinking) current
Output Supply Current:
100 mA @ 5 VDC for logic
750 mA @ 12 VDC for limit outputs
Data Update Rate: 4 ms; Data on 1855 Bus is frozen when
freeze input goes TRUE (30 ms).
Maximum distance between M1890 and 1855 limit
modules:
3 ft (914.4 mm) ribbon (isolated from other wiring) and 100 ft
(30.48 m) shielded cable (with CBL-E34MF)
b) Additional Parallel Output (Optional):
Output Format:
BCD, Binary, or Gray Code
Output Interface: T, P, N, or C
T: LS TTL (74LS645):
Logic TRUE:
2 VDC @ 15 mA, 20 mA leakage when tristated;
Logic FALSE: 0.35 V @ 24 mA, 0.4 mA leakage when tristated
MUX Input: Low-active TTL-level (i.e., Logic TRUE: 0-0.8 V
max; Logic FALSE: 2-5V)
P: PNP source transistor:
Logic TRUE:
Transistor ON, 1.7 V drop @ 100 mA
Logic FALSE: Transistor OFF, 0.2 mA leakage @ 50 V max.
N: NPN (sinking) transistor:
Logic TRUE:
Transistor ON, 1.1 V max @ 100 Ma
Logic FALSE: Transistor OFF, 0.1 mA leakage @ 50 V max.
C: NPN sink transistor:
Logic TRUE:
Transistor OFF, 0.1 mA leakage @ 50V
Logic FALSE: Transistor ON, 1.1 V max. @ 100 mA
Data Update Rate: 4 ms
Data Transfer Signal:
Logic HIGH:
4 to 5 V
Logic LOW: 0 to 1 V (edge-triggered)
Transmission Distance: 50 feet (max.)
c) Serial Output (Optional):
Output-types:
RS-232C or RS-422A
Transmission Distance:
RS-232C:
50 ft (15.24 m) max.
RS-422A: 2000 ft (609.6 m) max., with shielded cable.
Character Protocol: User-Definable
Baud Rate: Field-selectable 300, 600, 1200, 2400, 4800, and
9600 bps.